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SprocketN

omenclature

BottomDia.

OutsideDia.C

alip

erD

ia.

PitchDia.

(Even #of Teeth)

BoreHubO.D.

C/L to C/Lof Chain Row (Transverse Pitch)

Chain RowThickness

Face Width

Length Thru Bore(L.T.B.)

Sprocket Nomenclature

D 160 B 16 H 2 1/4# of Strands

SingleDoubleTripleQuadrupleDouble Single

BlankDEF

DS

Chain Pitch (measured in eighths)25 = 2/8 = 1/4"35 = 3/8 = 3/8"40 = 4/8 = 1/2"41 = 4/8 = 1/2"50 = 5/8 = 5/8"60 = 6/8 = 3/4"80 = 8/8 = 1"

100 = 10/8 = 1 1/4"120 = 12/8 = 1 1/2"140 = 14/8 = 1 3/4"160 = 16/8 = 2"180 = 18/8 = 2 1/4"200 = 20/8 = 2 1/2"240 = 24/8 = 3"

# of Teeth

Special Instructions

HSS

Hardened TeethStainless Steel

Bore Size

Sprocket Type

ABCD

Plate OnlyHub One SideHub Both SidesDetachable Hubs

JA, SH,... BTB H, P, Q,... BS

QDTaper BushedMST®

Bored-To-Size

SingleType ANo Hub

Ex: 25A40

SingleType B Hub

One SideEx: 35B20

SingleType C HubBoth SidesEx: 60C17

Type BSBored-to-SizeEx: 50BS16 1

Single QDEx: 35SH40

DoubleSingle

Ex: DS40A19

SingleTaper Bushed

Type BEx: 50BTB16

DoubleType B

Ex: D35B19H

DoubleType C

Ex: D60C72

SingleType D

Detachable HubEx: 100D30

DoubleTaper Bushed

Ex: D50BTB21Double QD

Ex: D80E52Triple Type BEx: E60B12

Triple QDEx: E60E68

Single MST®

Ex: 50P24Double MST®

Ex: D80R60Triple MST®

Ex: E60Q21Triple Type CEx: E60C72

Types of Sprockets