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है”ह”ह

IS 7456 (1994): Rock drill shanks and chuck bushings -Dimensions [PGD 8: Pneumatic Tools]

IS 7456 : 1994

ROCKDRILLSHANKSANDCHUCK BUSHINGS -DIMENSIONS

( First Revision )

UDC 621.9 - 229.211 : 622.223~05

@ BIS 1994

BUREAU OF INDIAN STANDARDS ~MANAR BHAVAN, 9 BAHADUR SHAH ZAFAR MARO

NEW DELHI 110002

December 1994 Price Group 1

Pneumatic Tools Sectional Committee, PE 08

FOREWORD

This Indian Standard ( First Revision ) was adopted by the Bureau of Indian Standards, after the draft finalized by the Pneumatic Tools Sectional Committee had been approved by the Production Engineering Division Council.

This standard was first issued in 1974. In view of the work done at IS0 level, this revision has been aligned with IS0 723 : 1991 ‘Rock drilling equipment - Forged collared shanks and corres- ponding chuck bushings for hollow hexagonal drill steels’, issued by the*International Organization for Standardization ( IS0 ).

In this revision an additional size of 28 mm has been included.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with 1-S 2 : 1960 ‘Rules for rounding off numerical values ( revised )‘. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS 7456 : I994

Indian Standard

ROCKDRILLSHANKSANDCHUCK BUSHINGS -DIMENSIONS

( First Revision ) 1 SCOPE ling holes in rock, concrete, etc. This standard covers the dimensions of rock drill shanks and its chucic bushings. 3 DIMENSIONS 2 TERMINOLOGY Rock Drill - Percussive rotating tool for dril- 3.1 Shanks

HEXAGONAL HOLLOW DRILL STEEL

z 1)

-y’ :d<_ rl r7

f 1.2 A I-

‘) DIAMETER MEASURED AT ME ENTRY POINT OF THE CONE

Nominal Size

19x 108

22x 108

25 x 108

25x 159

28x 159

-

-

-

-

-

-

-

S Tol on :1 s

19.2 108

II Min

50

50

50

70

75

-

-

-

-

-

-

-

All dimensions in millimetres.

J

I I 6.5 5.5 8.0

I I

6.5 813 9-5

I I

z-

-

-

9.5 jiO.91 38 1 4.5 / 16

9.5/IO.91 38 j 4.51 16

9.5 (IO-91 43 1 4.5 1 16

-

-

-

-

-

-

71 0

1.5

2.0

2.0

2.0

3.0

_-

-

-

-

-

-

-

-

*a”*2 Y

1 7

1 9

1 9

1 9

1 11

1

0.20

0.20

1

IS 1456 : 1994

3.2 Chuck Bushings

All dimensions in millimeters.

--

Nominal Size

19 x 108

22 x 108 / 22.4 1 : ::f: 1 4.5 1 1.2

25 x 108 1 25.6 / ++ ::f: 1 4.5 1 i.2

25 x 159 1 25.6 i ,‘~8% / 4.5 1 1.2

- ____-- ___-_

28 x 159

!

4 DESIGNATION

A rock drill shank of nominal size 25 x 108 shall be designated as:

Rock Drill Shank IS 7456 25 x 108

2

Bureau of Indian Standards

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Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.

Revision of lndian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is seaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and Standards Monthly Addition’.

This Indian Standard has been developed from Dot : No. PE 08 ( 0089 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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