D12B45

Metric Roller Chain Sprocket

Item #100965887

25 mm Minimum Bore

90 mm Maximum Bore

+ Show More

Auto Replenish

each One-time purchase

Product Details

Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat.

Manufactured of high carbon steel
Precise machining and processes ensure consistent finish and high quality
Bores are concentric to pitch line, minimizing run out
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain

Specifications

Length Through Bore	50.01 mm
Bore Style	Minimum Bore
Series	B
Martin No.	12B45
Outside Dia.	284.84 mm
Root Diameter	261 mm
Pitch Diameter [Min]	273.1 mm
Bore Range [Max]	90 mm
Family Name	No. 12 - 19.050 mm Pitch - Double - Type B & C
Chain No.	12B, 12B-2
No. of Teeth	45
Pitch Diameter	273.1 mm
Material	Steel
Pitch Root Diameter	261 mm
No. of Strands Across	2
Hardened Teeth	Without Hardened Teeth
Bore Range [Min]	25 mm
Single Strand Tooth Thickness	10.87 mm
Width Across Teeth	30.33 mm
Sprocket Style	B
Chain Pitch	19.05 mm
Bore Type	Reborable
Pin Diameter	12.065 mm
Inch/Metric	Metric
Caliper Diameter	260.86 mm
Hub Length Thru	50 mm
Outside Dia. [Min]	284.84 mm
Hub Dia.	130 mm
Weight	32.64 LB
EAN or UPC	697950401560