D12B45

Metric Roller Chain Sprocket

Item #100965887

25 mm Minimum Bore

90 mm Maximum Bore

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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

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