Twist Drills

Next

CONTENTSPage No.

Drill-Nomenclature

Silver and Deming Drills

Taper Shank Twist Drills

Taper Shank Core Drills

Centre Drills

Subland Drills - Parallel Shank

Subland Drills - Morse Tape Shank

Taper Shank Twist Drills - Long Series

Taper Shank Twist Drills - Extra Long Series

Parallel Shank Twist Drills - Jobber Series

Parallel Shank Twist Drills - Stub Series

Parallel Shank Twist Drills - Long Series

Parallel Shank Twist Drills - Extra Long Series

6

7

15

12

19

20

22

26

30

35

37

41

43

ShankDiameter Axis

StraightShank

ShankLength

Neck

. Overall Length

Flute Flute LengthBody

Lip Relief AngleHelix Angle -

DrillDiameter

Fluted Land

Point AngleTang Drive

Tanq

Taper Shank

Chisel Edge

Web

Land

Body Dia. Clearance

6Back

A drill having two helical flutes and a parallel shank of approximately the same diameter as the cutting end.

Type 'N ' Drills shall be supplied unlesss otherwise specified.

Back 7

High Speed Steel

Jobber SeriesPARALLEL SHANK TWIST DRILLS

Specifications conform toIS 5101-1991ISO 235-1980DIN 338-1978BS 328 : Part 1 : 1986Dimensions in mm / inch

mm

0.30 30.400.500.600.700.800.901.001.101.20 3/641.301.401.501.60 1/161.701.801.902.00 5/642.102.202.302.40 3/322.502.602.70

inch

1/64

1/32-

---

-

--

--

NumberSeries

68, 67, 6665, 64, 63

62,61,60 , 5958,5 7

565554

53,5 2

51,5 049

48, 4746,4 5

4443

42, 4140,3 938, 37

36

Diameter h8Flute

Length

56791011121416161818202022222424272730303033

OverallLength

19202224283032343638384040434346464949535357575761

mm

2.802.903.003.103.203.303.403.50 293.603.7 27, 263.80 253.90 24, 234.00 5/32 22,214.10 204.204.30 184.40 11/64 174.50 164.60 15, 144.70 134.80 3/16 124.90 11, 105.00 95.10 8, 75.20 13/64 6,5

inch

7/64

1/8

9/64 28

5/32 19

Diameter h8

NumberSeries

35,3 433,3 2

31

30

FluteLength

33333336363639393939434343434347474747475252525252

OverallLength

61616165656570707070757575757580808080808686868686

mm

5.305.405.505.605.705.805.906.006.106.206.306.406.506.606.706.806.907.007.107.207.307.407.507.607.707.807.908.008.108.208.308.408.50

inc

Diameter h8

h

7/32

15/64

1/4

17/64

9/32

19/64

5/16

21/64

Number &Letter Series

4,3

2

1A

B, CD

EFG

HIJK

LM

N

O

P

Q

FluteLength

525757575757575763636363636363696969696969696975757575757575757575

OverallLength

8693939393939393101101101101101101101109109109109109109109109117117117117117117117117117117

mm

8.608.708.808.909.009.109.209.309.409.509.609.709.809.90

10.0010.1010.2010.3010.4010.5010.6010.7010.8010.9011.0011.1011.2011.3011.4011.5011.6011.7011.80

inch

11/32

23/64

3/8

25/64

13/32

27/64

7/16

29/64

Diameter h8


R

S

T

U

V

w

X

Y

Z

FluteLength

818181818181818181818787878787878787878787949494949494949494949494

OverallLength

125125125125125125125125125125133133133133133133133133133133133142142142142142142142142142142142142

8Back

High Speed Steel



-------------

--

---

----

--

---

---

---

---

---

--

--

- --

-

---

--

--

--

---

---

---

--- -

-

-

-

-

-

-

--

-

--

-

--

-

--

-

-

mm

11.9012.0012.1012.2012.3012.4012.5012.6012.7012.8012.9013.00

13.1013.20

13.3013.40

13.50

inch

15/32

31/64

1/2

33/64

17/32

FluteLength

101101101101101101101101101101101101101101108108

108

Overal lLength

151151151151151151151151151151151151

151151160160

160

mm

13.6013.7013.8013.9014.0014.2514.5014.7515.0015.2515.5015.7516.0017.0018.0019.0020.00

Diameter h8

inch

35/64

9/16

37/64

19/3239/64

5/8

11/16

3/4

FluteLength

108108108108108114114114114120120120120125130135140

OverallLength

16016016016016016916916916917817817817818419119 8205

Back 9

Diameter h8

High Speed Steel



---

---

---

- -

-

-

-

-

-

-

--

--

Diameter

Fraction

1/64

1/32

3/64

1/16

5/64

3/32

7/64

1/8

9/64

NumberSeries

68, 67, 6665,64,63,6261,60,59,58

57,56

555453525150

49,4847

46,45,44

43,4241

40,3938,37

3635,34,33

3231

30

2928

mm

0.30.40.50.60.70.80.91.01.11.2

1.31.41.51.61.71.81.92.02.12.22.32.42.52.62.72.82.93.03.13.23.33.43.5

FluteLength

2.45.05.08.0

10.013.016.017.019.022.0

22.022.022.022.025.025.025.025.029.032.032.035.035.037.037.038.041.041.041.041.044.044.044.0

Overal lLength

19192229323538414448

4848484851515151545757606064646770707070737373

Fraction

5/32

11/64

3/16

13/64

7/32

15/64

1/4

17/64

Diameter


27,2625

24,23,22212019181716

15,1413

12,11109

8.76.543

2

1ABCDE

FG

H

mm

3.63.73.83.94.04.14.24.34.44.5

4.64.74.84.95.05.15.25.35.45.55.65.75.85.96.06.16.26.36.46.56.66.76.8

FluteLength

48484851545454545656

5659596262626464646467676767707070707373737373

Overal lLength

76767679838383838686

8689899292929595959598989898

102102102102105105105105105

Back 10

High Speed Steel

Jobbers LengthSTRAIGHT SHANK TWIST DRILLS

Specifications conform toASME B94. 11m-1993

Dimensions in mm / inch

---

---

----

-

-

-

--

---

--

--

--

-

- -

-

-

-

--

--

--

-

-

----

--

---

- -----

-

-

-

-

--

-

Fraction

9/32

19/64

5/16

21/64

- -

-

-

---

-

-

-

---

---

---

--

-11/32

--

-

-

-

--- -

23/64

3/8

25/64

Diameter

Letter Series

KJI

L

MN

O

P

Q

R

S-

T

U

V

w

X

mm

6.97.07.17.27.37.47.57.67.77.87.98.08.18.28.38.48.58.68.78.88.99.09.19.29.39.49.59.69.79.89.9

10.0

FluteLength

7373757575787878818181818484848787878789898989929292929595959595

OverallLength

105105108

108108111111111114114114114117117117

121121121

121

37/64124124124124

19/32

39/64127127127127130

130130130130

Fraction

13/32

27/64

7/16

29/64

15/32

31/64

1/2

33/6417/3235/64

-

-

-

-

-

-

-- -----------------------------

-

-

-

-

-

9/16

5/8

41/6421/32

43/6 4

11/16

Diameter

Letter Series

YZ

mmFlute

LengthOverallLength

10.2010.50

10.8011.0011.2011.5011.8012.00

12.2012.5012.8013.0013.2013.5013.8014.0014.2514.5014.7515.0015.2515.5015.7516.0016.2516.5016.7517.0017.2517.50

9898100103103106106110111

111114114114122122122122122122132132132132132132132132143143143143

133133137

140140143143146149149152152

152168168168168168168181181181181181181181181194194194

194

11Back

High Speed Steel

Jobbers LengthSTRAIGHT SHANK TWIST DRILLS

Specifications conform to


ASME B94.11M-1993

Diameter h8

mm

1.001.201.50

1.802.002.202.502.803.003.203.503.804.004.204.504.805.005.205.505.806.00

inch

3/64

1/16

5/64

3/327/64

1/89/64

5/32

11/643/16

13/647/32

15/64

FluteLength

689

10111213141616182022222224262626282828

OverallLength

26303234363840434646495255555558626262666666

mm

6.206.506.807.007.207.507.808.008.208.508.809.009.209.509.80

10.0010.2010.5010.8011.0011.2011.50

Diameter h8

inch

1/417/64

9/32

19/645/1621/64

11/32

23/64

3/825/6413/32

27/64

7/1629/64

FluteLength

31313434343437373737404040404343434347474747

OverallLength

70707474747479797979848484848989898995959595

A shortened form of parallel shank jobber series twist drill, the reduction in length being in the flute length.

Back 12

High Speed Steel

Stub SeriesPARALLEL SHANK TWIST DRILLS


-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Type 'N' Drills shall be supplied unless otherwise specified.

Diameter h8

mm

11.8012.0012.2012.5012.8013.0013.2013.5013.8014.0014.2514.5014.7515.0015.2515.5015.7516.0016.2516.5016.7517.0017.2517.5017.7518.0018.2518.5018.7 519.00

inch

15/3231/64

1/233/64

17/3235/64

9/16

37/64

19/3239/64

5/8

416 4

21/32

43/6411/1645/6 4

23/32

47/6 4

FluteLength

475151515151515454545656565658585858606060606262626264646464

OverallLength

95102102102102102102107107107111111111111115115115115119119119119123123123123127127127127

Diameter h8

mm

19.2519.5019.7520.0020.2520.5020.7521.0021.2521.5021.7522.0022.2522.5022.7523.0023.2523.5023.7524.0024.2524.5024.7525.0025.2525.5025.7526.0026.2526.50

inch

3/449/6 425/32

51/64

13/1653/64

27/3255/64

7/8

57/6429/32

59/6415/1 6

61/6431/32

63/641

1.1/32

FluteLength

666666666868686870707070707272727272757575757575787878787878

OverallLength

131131131131136136136136141141141141141146146146146146151151151151151151156156156156156156

Back 13

High Speed Steel



-

-

-

-

-

-

-

-

--

--

-

-

-

-

-

-

-

-

-

-

-

-

Diameter h8

mm

26.7527.0027.2527.5027.7528.0028.2528.5028.7529.0029.2529.5029.7530.0030.2530.5030.7531.0031.25

inch

1.1/16

1.3/32

1.1/8/

1.5/32

1.3/16

1.7/32

FluteLength

81818181818184848484848484848787878787

OverallLength

162162162162162162168168168168168168168168174174174174174

mm

31.5031.7532.0032.5033.0033.5034.0034.5035.0035.5036.0036.5037.0037.5038.0038.5039.0039.5040.00

Diameter h8

inch

1.1/4

1.9/32

1.5/161.11/32

1.3/8

1.13/321.7/16

1.15/321.1/2

FluteLength

8790909090909393939396969696

100100100100100

OverallLength

174180180180180180186186186186193193193193200200200200200

Back 14

High Speed Steel


Specifications conform toIS 5100-1969ISO 235-1980DIN1897-1984BS 328 : Part 1 : 1986Dimensions in mm / inch

- -

-

-

-

-

-

-

-

-

-

-

-

--

-

-

-

--

--

-

Diameter h8

mm

1.001.101.201.301.401.501.601.701.801.902.002.102.202.302.402.502.602.702.802.903.00

inch

3/64

1/16

5/64

3/32

7/64

FluteLength

333741414545505053535656595962626266

666666

OverallLength

5660656570707676808085859090

959595

100100

100100

mm

3.103.203.303.403.503.603.703.803.904.004.104.204.304.404.504.604.704.804.905.00

5.10

Diameter h8

inch

1/8

9/64

5/32

11/64

3/16

FluteLength

6969697373737378787878788282828282878787

87

OverallLength

106106106112112112112119119119119119

126126126

126126

132132132132

A lengthened form of the parallel shank jobber series twist drill, the increase in length being in the flute length.

Type 'N' Drills shall be supplied unless otherwise specified.

Back

High Speed Steel

Long SeriesPARALLEL SHANK TWIST DRILLS


15

- -

-

-

-

-

-

-

--

-

-

-

-

-

-

-

-

--

-

--

-

--

-

--

-

-

-

High Speed Steel



Diameter h8

mm

5.205.305.405.505.605.705.805.906.006.106.206.306.406.506.606.706.806.907.007.107.207.307.407.507.607.707.807.908.008.10

inch

13/64

7/32

15/6 4

1/4

17/6 4

9/32

19/64

5/16

FluteLength

87879191919191919197979797979797

102102102102102102102102109109109109109109

Overal lLength

139139139139139139

139132132

148148148148148148148

156156

156156156156156156165165165165165165

mm

8.208.308.408.508.608.708.808.909.009.109.209.309.409.509.609.709.809.90

10.0010.1010.2010.3010.4010.5010.6010.7010.8010.9011.0011.10

Diameter h8

inch

21/64

11/32

23/64

3/8

25/64

13/32

27/64

7/16

FluteLength

109109109109115115115115115115115115115115121121121

121121121121121121121121128128128128128

OverallLength

165165165165175175175175175175175175175175

184184

184184184184184184184184184195195195195195

16Back

lh

---

--

-

---

---

--

----

-

-

- ---

-

--

---

--

----

---

---

-

-

Diameter h8

mm

11.2011.3011.4011.5011.6011.7011.8011.9012.0012.1012.2012.30

12.4012.5012.6012.7012.8012.9013.0013.1013.2013.3013.4013.5013.6013.7013.8013.9014.0014.25

inch

29/64

15/32

31/64

1/2

33/64

17/32

35/64

9/16

FluteLength

128128

128128128

128

128

134134134134134

134134

134134134134134134134140140140140140140140140144

OverallLength

195195195195195195195205205205205205

205205205205205205205205205214214214214214214214214220

Diameter h8

mm

14.5014.7515.0015.2515.5015.7516.0016.2516.5016.7517.0017.25

17.5017.7518.0018.2518.5018.7519.0019.2519.5019.7520.0020.2520.5020.7521.0021.2521.5021.75

inch

37/64

19/32

39/64

5/841/64

21/32

43/64

11/1645/64

23/32

47/64

3/449/6 425/32

51/64

13/1653/64

27/3 255/6 4

FluteLength

144144144149

149149149154154154154158

158

158162162162162

158

166166166166

171171

171171176176

176

OverallLength

220220220227227227227235235235235241

241241241247247247247254254254254261261261261268268268

Back 17

High Speed Steel



- -

-

-

-

-

-

-

-

-

-

-

--

---

---

---

---

---

---

-

Diameter h8

mm

22.0022.2522.5022.7523.0023.2523.5023.7524.0024.2524.5024.7525.0025.2525.5025.7526.0026.2526.5026.75

inch

7/8

57/6429/32

59/6415/16

61/6431/32

63/641

1.1/32

FluteLength

176176180180180180180185185185185185185190190190190190190195

Overal lLength

268268275275275275275282282282282282282290290290290290290298

mm

27.0027.2527.5027.7528.0028.2528.5028.7529.0029.2529.5029.7530.0030.2530.5030.7531.0031.2531.50

Diameter h8

inch

1.1/16

1.3/32

1.1/8

1.5/32

1.3/16

1.7/32

FluteLength

195195195195195201201201201201201201201207207207207207207

OverallLength

298298298298298307307307307307307307307316316316316316316

18Back

High Speed Steel



-

--

-

-

--

-

-

-

-

-

-

-

-

-

-

-

-

--

--

Diameterh8

3.03.54.04.55.05.56.06.57.07.58.08.59.09.5

10.0

Flute Length

100115120125135140140150155155165165175175185

SERIES 1

OverallLength

150165175185195205205215225225240240250250265

Flute Length

130145150160170180180190200200210210220220235

SERIES 2

OverallLength

190210220235245260260275290290305305320320340

Flute Length

180190200210225225235250250265265280280295

OverallLength

265280295315330330350370370390390410410430

SERIES 3

Back 19

High Speed Steel

Extra Long SeriesPARALLEL SHANK TWIST DRILLS

Specifications conform toIS 7823 -1983DIN 1869-1978

Dimensions in mm

Size

25/32

13/16

27/32

7/ 8

29/32

15/16

31/32

1

1.1/32

1.1/16

1.3/32

1.1/8

1.5/32

1.3/16

1.7/32

1.1/4

1.9/32

1.5/16

1.11/32

1.3/8

FluteLength

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

OverallLength

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

Size

1.13/32

1.7/16

1.15/32

1.1/2

1.17/32

1.9/16

1.19/32

1.5/8

1.21/32

1.11/16

1.23/32

1.3/4

1.25/32

1.13/16

1.27/32

1.7/8

1.29/32

1.15/16

1.31/32

2

FluteLength

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

OverallLength

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

6

Back 20

High Speed Steel

(Size of Shank : 3/4" Dia x 2-1/4" Shank Length)SILVER AND DEMING DRILLS-3/4" SHANK Dimensions in inch

Size

33/6417/3235/649/1637/6419/3239/645/841/6421/3243/6411/1645/6423/3247/643/449/6425/3251/6413/1653/6427/3255/647/8

OverallLength

666666

666666666666666666

Size

57/6 429/3259/6415/1661/6431/3263/6411.1/321.1/161.3/321.1/81.5/321.3/161.7/321.1/41.9/321.5/161.11/321.3/81.13/321.7/161.15/321.1/2

FluteLength

333333333333333333333333

Overal lLength

666666666666666666666666

Back 21

FluteLength

3333333333333333333333

33

High Speed Steel

(Size of Shank : 1/2" Dia x 2-1/4" Shank Length)SILVER AND DEMING DRILLS-1/2" SHANK Dimensions in inch

Diameter h8

mm

3.003.203.503.804.004.204.504.805.005.205.505.806.006.206.506.807.007.207.507.808.00

inch

1/89/64

5/32

11/643/16

13/647/32

15/6 4

1/417/64

9/32

19/645/16

FluteLength

333639434343475252525757576363696969697575

Overal lLength

114117120124124124128133133133138138138144144150150150150156156

MorseTaper

No.

111111111111111111111

Diameter h8

mm

8.2 08.5 08.8 09.0 09.2 09.5 09.8 0

10.0010.2010.5010.8011.0011.2011.5011.8012.0012.2012.5012.8013.0013.20

inch

21/64

11/3 2

23/64

3/825/6413/32

27/64

7/1629/64

15/3231/64

1/233/64

FluteLength

757581818181878787879494949494101101101101101101

OverallLength

156156162162162162168168168168175175175175175182182182182182182

MorseTaperNo.

111111111111111111111

A drill having two helical flutes and a standard Morse Taper Shank

Type 'N ' Drills shall be supplied unless otherwise specified .

Back 2 2

High Speed SteelTAPER SHANK TWIST DRILLS


-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Diameter h8

mm

13.50

13.8 014.0 014.2 514.5014.7515.00

15.25

15.50

15.75

16.00

16.25

16.50

16.75

17.00

17.2517.50

17.75

18.00

18.25

18.50

18.7519.00

19.25

19.50

19.7520.00

20.25

20.50

20.75

inch

17/3235/64

9/16

37/64

19/3239/64

5/841/64

21/32

43/6411/16

45/6423/3 2

47/6 4

3/449/6425/32

51/64

13/16

FluteLength

108108108114114114114

120120120120125125125

125130130130130135135135135140140140140145145145

OverallLength

189189189212212212212

218218218

218223223223223228228228228233233233233238238238238243243243

MorseTaper

No.

1112222

2222222

22222222222222

22

mm

21.0021.2521.5021.7522.0022.2522.50

22.7523.0023.2523.5023.75

24.0024.25

24.5024.7525.0025.2525.5025.7526.0026.2526.5026.7527.0027.2527.5027.75

28.0028.25

Diameter h8

inch

53/6 4

27/3 255/6 4

7/857/6 4

29/32

59/6 415/16

61/64

31/32

63/6411.1/64

1.1/32

1.3/641.1/16

1.5/641.3/32

1.7/64

FluteLength

145150150150150150155

155155155155160

160160

160160160165165165165165165170170170170170

170175

243248248248248248253

253253276276281

281281

281281281286286286286286286291291291291291

291296

OverallLength

MorseTaper

No.

2222222

22333

33

33333333333333

33

23Back



- -

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Diamete r h8

mm

28.5028.7529.0029.2529.5029.75

30.0030.2530.5030.7531.0031.2531.5031.7532.0032.5033.0033.5034.0034.5035.0035.5036.0036.5037.0037.5038.0038.5039.0039.5040.00

inch

1.1/8

1.9/64

1.5/32

1.11/64

1.3/161.13/64

1.7/321.15/64

1.1/4

1.9/32

1.5/161.11/32

1.3/8

1.13/321.7/16

1.15/321.1/2

1.17/321.9/16

FluteLength

175175175175175175

175180180180180180180185185185185185190190190190195195195195200200200200200

OverallLength

296296296296296296

296301301301301301301306334334334334339339339339344344344344349349349349349

MorseTaper

No.

333333

3333333344444444444444444

mm

40.5041.0041.5042.0042.5043.00

43.5044.0044.5045.0045.5046.0046.5047.0047.5048.0048.5049.0049.5050.0050.5051.0052.0053.0054.0055.0056.0057.0058.0059.0060.00

Diameter h8

inch

1.19/32

1.5/81.21/32

1.11/16

1.23/32

1.3/4

1.25/321.13/16

1.27/32

1.7/81.29/321.15/16

1.31/32,2

2.1/16

2.1/8

2.3/162.1/4

2.5/1 6

FluteLength

205205205205205210

210210210210

215215215215215220220220220220225225225225230230230235235235235

OverallLength

354354354354354359

359359359359

364364364364364369369369369369374412412412417417417422422422422

MorseTaperNo.

44444

44444444444444445555555555

24Back



-

-

-

-

-

-

-

-

-

-

-

- -

-

-

-

-

-

--

-

-

-

-

mm

61.0062.0063.0064.0065.0066.00

67.0068.0069.0070.0071.0072.0073.0074.0075.0076.0077.0078.0079.0080.0081.00

inch

2.3/82.7/16

2.1/22.9/16

2.5/ 82.11/16

2.3/4

2.13/162.7/8

2.15/1 63

3.1/163.1/18

3.3/1 6

FluteLength

240240240245245245245250250250250255255255255260260260260260265

OverallLength

427427427432432432432437437437437442442442442447514514514514519

MorseTaperNo.

555555555555555566666

Diameter h8

mm

82.0083.0084.0085.0086.0087.0088.0089.0090.0091.0092.0093.0094.0095.0096.0097.0098.0099.00

100.00101.00102.00

inch

3.1/43.5/1 6

3.3/83.7/16

3.1/2

3.9/163.5/8

3.11/16

3.3/43.13/163.7/8

3.15/164

Diameter h8 FluteLength

265265265265270270270270270275275275275275280280280280280285285

OverallLength

519519519519524524524524524529529529529529534534534534534539539

MorseTaperNo.

666666666666666666666

25Back


Specifications conform toIS 5103-1969ISO 235-1980 DIN 345-1978BS 328 : Part 1 : 1986Dimensions in mm / inch

--

-

-

-

-

--

-

-

-

-

-

-

-

Diameterh8

5.05.15.25.35.45.55.65.75.85.96.06.16.26.3

6.46.56.66.7

6.86.9

7.07.1

Flut eLengtht

7474747480808080808080868686

86868686

93939393

OverallLength

155

155155

155161161161161161

161161167

167167167167167167

174174

174174

MorseTaper

No.

11111111111111

11

1111

11

Diameterh8

7.27.37.47.57.67.77.87.98.08.18.28.38.4

8.58.68.7

8.88.99.09.19.29.3

FluteLength

93939393

100100100100100100100100100

100107107

107107107107107107

OverallLength

174174

174174181181181181181181181181181

181188188

188188188188188188

MorseTaper

No.

11111111

11111111111111

A lengthened form of the Taper Shank Twist Drill, the increase in length being in the flute length.

Type ' N ' Drills shall be supplied unless otherwise specified.

Back 26


Specifications conform toIS 8305-1976DIN 341-1978

Dimensions in mmLong Series

Diameterh8

9.49.59.69.79.89.9

10.010.110.210.310.410.510.610.710.810.911.011.111.211.311.411.511.611.711.811.912.012.112.212.312.4

FluteLength

107107116116116116116116116116116116116125125125125125125125125125125125125134134134134134134

OverallLength

188188

197197197

197197197

197197

197197

197

MorseTaper

No.

1111111111111111111111111111111

Diameterh8

12.512.612.712.812.913.013.113.213.313.413.513.613.713.813.914.014.2514.514.7515.015.2515.515.7516.016.2516.516.7517.017.2517.517.75

FluteLength

134134134134134134134134142142142142142142142142147147147147153153153153159159159159165165165

OverallLength

215215215215215215215215223223223223223223223223245245245245251251251251257257257257263263263

MorseTaper

No.

1111111111111111222222222222222

Back 27

206206206206206206206

206206206

215215

215215215

215

206206


Long Series


Dimensions in mm

Diamete rh8

18.0018.2518.50

18.75

19.00

19.2519.50

19.75

20.00

20.2520.5 020.7521.0 021.2 521.5 021.7 522.0 022.2 522.5 022.7 5

23.0 023.2 523.5 023.7 524.0 024.2 524.5 024.7525.0 025.2 5

FluteLength

165

171

171

171171

177177

177177

184

184

184184191191191191191

198198

198198198206206206206206

206214

OverallLength

263269269269269275275275275282282282282289289289289289296296

296319319327327327327327

327335

MorseTaperNo.

22222222222222222222

23333333

33

Diameterh8

25.5025.7526.0026.2526.5026.7527.0027.2527.5027.7528.00

28.2528.5028.7529.0029.2529.5029.7530.0030.2530.5030.7531.0031.2531.5031.7532.0032.5033.0033.50

FluteLength

214214214214214222222222222222222

230230230230230230230230239239239239239239248248248248248

OverallLength

335335335335335343343343343343343

351351351351351351351351360360360360360360369397397397397

MorseTaperNo.

33333333333

3333333333333334444

Back 28


Long Series


Dimensions in mm

Diameterh8

34.0034.2534.5035.0035.5036.0036.5036.7537.0037.5038.0038.5039.0039.5040.0040.5041.0041.50

FluteLength

257257257257257267267267267267277277277277277287287287

OverallLength

406406406406406416416416416416426426426426426436436436

MorseTaper

No,

444444444444444444

Diameterh8

42.0042.5043.0043.5044.0044.5045.0045.5046.0046.5047.0047.5048.0048.5049.0049.5050.00

FluteLength

287287298298298298298310310310310310321321321321321

OverallLength

436436

447447

447447447459459459459459470470470470470

MorseTaper

No.

44444444444444444

29Back


Long Series


Dimensions in mm

Diameterh8

FluteLength

SERIES1OverallLength

FluteLength

SERIES 2OverallLength

MorseTaperNo.

3 0

A lengthened form of the Morse Taper Shank Twist Drill, longer than the long series.

Type 'N ' Drills shall be supplied unless otherwise specified.

Back


Extra Long Series


Dimensions in mm

8.0 165 265 210 330 18.5 165 265 210 330 1

9.0 175 275 220 345 19.5 175 275 220 345 1

10.0 185 285 235 360 110.5 185 285 235 360 111.0 195 300 250 375 111.5 195 300 250 375 112.0 205 310 260 395 112.5 205 310 260 395 113.0 205 310 260 395 113.5 220 325 275 410 114.0 220 325 275 410 114.5 220 340 275 425 215.0 220 340 275 425 215.5 230 355 295 445 216.0 230 355 295 445 216.5 230 355 295 445 217.0 230 355 295 445 2

17.5 245 370 310 465 218.0 245 370 310 465 218.5 245 370 310 465 219.0 245 370 310 465 219.5 260 385 325 490 220.0 260 385 325 490 220.5 260 385 325 490 221.0 260 385 325 490 221.5 270 405 345 515 222.0 270 405 345 515 222.5 270 405 345 515 223.0 270 405 345 515 223.5 270 405 345 535 3

Diameterh8

24.024.525.025.526.026.527.027.528.028.529.029.530.031.032.033.034.035.036.037.038.039.040.041.042.0

43.044.045.046.047.048.049.050.0

FluteLength

290290290290290290305305305305305305305320320320340340340340360360360360360

385385385385385405405405

SERIES 1

OverallLength

440440440440440440460460460460460460460480505505530530530530555555555555555

585585585585585605605605

MorseTaper

No.

3333333333333344444444444

44444444

31Back


Extra Long Series


Dimensions in mm

Diameter

Fraction

1/8

9/645/32

11/643/16

13/647/32

15/641/4

17/649/32

19/645/16

mm

3.03.23.53.84.04.24.54.85.05.25.55.86.06.26.56.87.07.27.57.88.0

FluteLength

FluteLength

485454546464647070707073737376767679797983

REGULAR SHANK REGULAR SHANK

OverallLength

OverallLength

130137137137146146146152152152152156156156159159159162162162165

MorseTaperNo.

MorseTaperNo.

111111111111111111111

Fraction

21/6411/32

23/643/8

25/6413/32

27/647/16

29/6415/32

31/641/2

33/64

Diameter

mm

8.28.58.89.09.29.59.8

10.010.210.510.811.011.211.511.812.012.212.512.813.013.2

838389898989929292989898105105105111111111117117117

165165171171171171178178178184184184190190190210210210

216216216

111111111111111222222

Back 32


Specifications conform toASME B94. 11M-1993


Diameter

Fraction

17/3235/64

9/16

37/64

19/32

39/645/8

41/6421/32

43/6411/16

45/6423/3247/643/449/6425/3251/6413/1653/64

27/3255/647/8,57/64

mm

13.5013.8014.0014.2514.5014.7515.0015.2515.5015.7516.0016.2516.5016.7517.0017.2517.5018.00

18.5019.0019.50

20.0020.5021.00

21.5022.0022.50

FluteLength

FluteLength

124

117

124124124124124124124124130130130137137137143143143149149152152156156156156156156

OverallLength

OverallLength

216222222222222222222222222222229229229235235235241241241248248251251273273273273273273


MorseTaper

No.22222222222222222222222333333

Fraction

29/3259/64,15/1 661/6431/3263/64,11.1/641.1/321.3/641.1/161.5/64,1.3/3 21.7/641.1/81.9/64,1.5/3 21.11/641.3/161.13/64,1.7/3 21.15/641.1/41.17/641.9/321.19/64,1.5/1 61.21/641.11 /32

Diameter

mm

23.0023.5024.0024,5025.0025.5026.0026.5027.0027.5028.0028.5029.0029.5030.0030.5031.0031.5032.0032.5033.0033.5034.00

156156

162162

162

165165168168175181181184187187190200200216216219222222

273273279279279283283286286318324324327330330333343343359359362365365

MorseTaperNo.

33333333344444444444444

33Back




-

-

-

-

-

-

-

-

Diameter Diameter

Fraction

1.23/64,1.3/ 81.25/641.13/32

1.27/641.7/161.29/64,1.15/3 21.31/641.1/21.17/321.9/161.19/321.5/81.21/321.11/161.23/32,1.3/ 41.25/321.13/161.27/32

1.7/8

1.29/321.15/161.31/322,2.1/322.1/162.3/322.1/8

mm

34.5035.0035.50

36.0036.5037.0037.5038.00

39.0040.0041.0042.0043.0044.0045.0046.00

47.0048.0049.0050.0051.0052.0053.0054.00

FluteLength

FluteLength

225229229

232232235238238238244251254257257257257257257264264264264264260260260


368371371

375375378381381416422429432435435435435435435441441441441441441441441

MorseTaper

No.

444

44444555555555555555555

Fraction

2.5/32, 2.3/162.7/322.1/4

2.5/162.3/8

2.7/162.1/2

2.9/162.5/8

2.11/162.3/4

2.13/16

2.7/8

2.15/163

3.1/83.1/4

mm

55.0056.0057.00

58.0059.0060.0061.0062.0063.0064.0065.0066.0067.0068.0069.0070.0071.0072.0073.0074.0075.0076.0077.0078.00

286286286302302302324324324340340340340356356356371371371394

OverallLength

OverallLength

441441441

260257257257257257

441441441476476

476495495495518518518537537537537552552552622622622648

MorseTaper

No.

555

55

555

555555555555556666

34Back




-

--

-

-

-

-

-

-

--

-

-

Diameter h8

mm

7.00

8.00

9.00

10.00

11.00

12.00

13.00

14.00

15.00

16.00

17.0018.0019.0020.0021.0022.0023.0024.0025.0026.0027.0028.00

inch

9/325/1611/323/8 , 13/3 27/1615/321/217/329/1619/32, 5/821/3211/1623/323/4, 25/3213/1627/32, 7/829/32

15/16, 31/321, 1.1/321.1/161.3/32

FluteLength

6975818794

101101108114120125130135140145150155160160165170170

OverallLength

150156162168175182182189212218223228233238243248253281281286291291

MorseTaperNo.

1111111122222222233333

Diameter h8

mm

29.0030.0031.00

32.0033.0034.0035.0036.0037.0038.0039.0040.0041.0042.0043.0044.0045.0046.0047.0048.0049.00

inch

1.1/8, 1.5/32

1.3/16,1.7/3 2

1.1/41.9/321.5/161.11/321.3/81.13/321.7/16, 1.15/321.1/2

1.9/161.5/8

1.11/161.3/4

1.13/16

1.7/81.15/16

FluteLength

175175180185185185190190195195200200200205205210210210215215220220

OverallLength

296296301306334334339339344344349349349354354359359359364364369369

MorseTaper

No.

3333444444444444444444

3 5

A drill having three or more helical flutes and a standard Morse Taper Shank designed for opening out or enlarging holes.

Back

High Speed SteelTAPER SHANK CORE DRILLS

Specifications conform toIS 5366 : 1978ISO 7079 : 1981DIN 343 : 1981BS 328 : 1959Dimensions in mm / inch

-

-

-

-

-

-

-

Diameter h8

mm

50.0050.5051.0052.0053.0054.00

55.0056.0057.0058.0059.0060.0061.0062.0063.0064.00

inch

2

2.1/16

2.1/8

2.3/162.1/4

2.5/16

2.3/82.7/16

2.1/2

FluteLength

220225225225225230

230230235235235235240240240245

OverallLength

369374412412412417

417417422422422422427427427432

MorseTaper

No.

445555

5555555555

mm

65.0066.0067.0068.0069.0070.00

71.0072.0073.0074.0075.0076.0077.0078,0079.0080.00

Diameter h8

inch

2.9/1 6

2.5/82.11/16

2.3/4

2.13/162.7/8

2.15/163

3.1/1 63.1/8

FluteLength

245245245250250250

250255255255255260260260260260

OverallLength

432432432437437437

437442442442442447514514514514

MorseTaper

No.

555555

5555556666

lSO 7079 : 1981 Specifies th e Diameter ranges , over 7.5 to 50 mmDIN 343 : 1981 Specifies the Diameter ranges , ove r 8.5 to 50 mm

Back

1) Taper Shank Core drills upto and including 20 mm dia are supplied with 3 flutes, over 20 mm dia to75 mm dia ar e supplied with 4 flutes an d over 75 mm di a ar e supplied with 6 flutes.(For DIN Specification, the No. of Flutes shall be 3 for sizes upto & incl. 50mm dia )

2) Type 'N' Drills shall be supplied unless otherwise specified.

36

High Speed SteelTAPER SHANK CORE DRILLS

Specifications conform toIS 5366 : 1978ISO 7079 : 1981DIN 343 : 1981BS 328 : 1959Dimensions in mm / inch

Pilot Diakl 2

1.001.251.602.002.503.154.005.006.308.00

10.00

Body Diah9

3.153.154.005.006.308.00

10.0012.5016.0020.0025.00

Max

33.533.537.542.047.052.059.066.074.083.0

103.0

Overall Length

Min

29.529.533.538.043.048.053.060.068.077.097.0

Max

1.902.202.803.304.104.906.207.509.20

11.5014.20

Pilot Length

Min

1.31.62.02.53.13.95.06.38.0

10.112.8

Tolerance onOverallLength

± 1/32± 1/32± 1/16± 1/16

± 3/32± 3/32

± 3/32

OAL

1.1/21.3/422.1/42.1/233.1/2

Min

1/165/641/85/321/45/1613/32

Max

5/643/325/323/169/323/815/32

3/641/163/321/83/161/45/16

Body Dia. Pilot Dia.

1/83/161/45/167/165/83/4

BS No.

1234567

Back 37

Type - 'A' Centre Drill for centre holes without protecting chamfer.

Pilot Length

High Speed SteelCENTRE DRILLS - Type 'A'

Specifications conform toIS 6708 : 1977ISO 866 : 1975DIN 333 : 1986

Dimensions in mm

High Speed SteelCENTRE DRILLS

Specifications conform to

BS 328 : Part 2 : 1950

Dimensions in inch

38Back

Type - 'B' Centre Drills for centre holes with protecting chamfers.

High Speed SteelCENTRE DRILLS - Type 'B'


Dimensions in mm

Pilot Diakl2

1.602.002.503.154.005.006.308.00

Body Diah9

6.38.0

10.011.214.018.020.025.0

Max

47525963707883

103

Overall Length

Min

4348535764727797

Max

2.83.34.14.96.27.59.2

11.5

Pilot Length

Min

2.02.53.13.95.06.38.0

10.1

Back 39

Type - 'R' Centre Drills for centre holes with radius form.

High Speed SteelCENTRE DRILLS - Type 'R'


Dimensions in mm

Pilot Diak12

1.001.251.602.002.503.154.005.006.308.00

10.00

Body Diah9

3.153.154.005.006.308.00

10.0012.5016.0020.0025.00

Max

33.533.537.542.047.052.059.066.074.083.0

103.0

Overal l Length

Min

29.529.533.538.043.048.053.060.068.077.097.0

PilotLength

3.003.354.255.306.708.50

10.6013.2017.0021.2026.50

Max.

3.154.005.006.308.00

10.0012.5016.0020.0025.0031.50

Radius

Min.

2.503.154.005.006.308.00

10.0012.5016.0020.0025.00

40Back

Size

131415161718

BodyDiameter

1/45/167/161/25/83/4

DrillDiameter

3/327/645/323/167/321/4

OverallLength

22.1/82.3/433.1/43.1/2

Size

12345678

PLAIN TYPE

BodyDiameter

1/83/161/45/167/161/25/83/4

DrillDiameter

3/645/647/641/83/167/321/45/16

OverallLength

1.1/41.7/822.1/82.3/433.1/43.1/2

BELL TYP E

COMBINED DRILLS ANDCOUNTERSINKS

Specifications conform toASME B94. 11M- 1993

Dimensions in inch

Back 41

For Fine series Type - A Countersinks

For Medium series Type - A Countersinks

Tool Type 'N' Subland Drills shall be supplied unless otherwise specified.

High Speed SteelSUBLAND TWIST DRILLS WITH PARALLEL SHANK

Specifications conform toIS 12692: 1989

Dimensions in mmFor clearance holes and countersinks for countersunk head screws

Big Diah8

13.017.2

Small Diah9

6.69.0

StepLength

1519

FluteLength

101130

OverallLength

151191

Suitable forCountersunkhea d screws

M6x 1M8x 1.25

Bi g Dih8

11.515.019.0

Small Diaah9

6.48.4

10.5

StepLength

151923

FluteLength

94114135

OverallLength

142169198

Suitable forCountersunkhea d screws

M6 x 0.75M8 x 0.75

M10 x 0.75

Note : For fine pitch threads, subland twist drills shall be manufactured to the samedimensions of 'd' L' ' and 'l2 'l1 '. They can be ordered as special tools and diameter 'd1'must be specified in such cases as given in IS : 10952 -1984.

Tool Type 'N' subland drills shall be supplied unless otherwise specified.

42Back



Dimensions in mm

For clearance holes and countersinks for countersunk head screws

Big Diah8

11.0

14.015.5

9.0

Small Diah9

6.88.5

10. 212. 0

StepLength

21.025.530.034.5

FluteLength

8194

108120

OverallLength

125142160178

Suitable forscrew threads

M8 x 1.25M10 x 1.5M12 x 1.75M14 x 2.0


4 3Back




Dimensions in mm

For clearance holes and counterbores

High Speed SteelSUBLAND TWIST DRILLS WITH


Dimensions in mmFor clearance holes and countersinks for countersunk head screws

Big Dih8

111518

Small Diaah9

6.69.0

11.0

StepLength

151923

FluteLength

94114130

OverallLength

142169191

Suitable forCheese

hea d screws

M6 x 1M8 x 1.25M10x 1.5

Big Diah8

13.017.221.525.028.0

Small DIah9

6.69.0

11.013.515.5

Steplength

1519232731

Flutelength

101130150160170

Overalllength

182228248281291

MorseTaper

No.

12233

Suitable forCountersunkhead screws

M6 x 1M8 x 1.25M10 x 1.5M12 x 1.75M14 x 2.0

for slotted cheese head screws

MORSE TAPER SHANK

44

Note : For fine pitch threads, these sub land twist drills shall be manufactured to thesame dimensions of d, , L, l2 l1 and Morse Taper Number as given in the above table, butcan be ordered as a special tool with diameter 'd1' specified according toIS: 10952-1984,

Tool Type 'N' Subland Drills shall be supplied unless otherwise specified.

Back

High Speed SteelSUBLAND TWIST DRILLS WITH

MORSE TAPER SHANK


Dimensions in mmFor holes prior to tapping screw threads

Big Dih8

911141618202224263033

Small Diaah9

6.88.5

10.212.014.015.517.519.521.024.026.5

StepLength

21.025.530.034.538.543.547.551.556.562.570.0

FluteLength

8194

108120130140150160165175185

OverallLength

162175189218228238248281286296334

MorseTaperNo.

11122223334

Suitable forscrew

threads

M8 x 1.25M10 x 1.5M12 x 1.75M14 x 2.0M16 x 2.0M18 x 2.0M20 x 2.5M22 x 2.5M24 x 3.0M27 x 3.0M30 x 3.5

45Tool Type 'N' subland drills shall be supplied unless otherwise specified.

Back

High Speed SteelSUBLAND TWIST DRILLS WITH MORSE TAPER SHANK


Dimensions in mmFor clearance holes and counterbores for slotted head screws

eBig Diah8

11

15182024263033

Small Diah9

6.6

9.011.013.515.517.520.022.0

StepLength

15

19232731353943

FluteLength

94

114130140160165175185

OverallLength

175

212228238281286296334

MorseTaper

No.

1

2223334

Suitable forSlotted Cheese

head screws

M6 x 1M8 x 1.25M10 x 1.5M12 x 1.75

M14 x 2.0M16 x 2.0M18 x 2.5M20 x 2.5

Documents

Twist Drills