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Metric Roller Chain Sprocket

D12B21

Metric Roller Chain Sprocket
Item #100965872
  • 12B-2 Chain Number
  • 2 Strands
  • 21 Teeth
  • Without Hardened Teeth
  • B Sprocket Style
  • 20 mm Minimum Bore
  • 70 mm Maximum Bore
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Metric Roller Chain Sprocket
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    Shipment Options
  • 12B-2 Chain Number
  • 2 Strands
  • 21 Teeth
  • Without Hardened Teeth
  • B Sprocket Style

description

  • 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.

features

  • 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
Width Across Teeth 30.33 mm
Hub Length Thru 39.13 mm
Hardened Teeth Without Hardened Teeth
Pitch Diameter 127.8 mm
Family Name No. 12 - 19.050 mm Pitch - Double - Type B & C
Martin No. 12B21
Bore Range [Max] 70 mm
Material Steel
Bore Range [Min] 20 mm
Chain No. 12B, 12B-2
Inch/Metric Metric
Bore Style Minimum Bore
Pin Diameter 12.065 mm
Length Through Bore 50.01 mm
Chain Pitch 19.05 mm
Pitch Root Diameter 115.8 mm
Pitch Diameter [Min] 127.8 mm
Root Diameter 115.8 mm
Single Strand Tooth Thickness 10.87 mm
No. of Teeth 21
Sprocket Style B
No. of Strands Across 2
Caliper Diameter 115.39 mm
Bore Type Reborable
Outside Dia. [Min] 139.56 mm
Series B
Outside Dia. 139.56 mm
Hub Dia. 100 mm
Weight 9.07 LB
EAN or UPC 697950401416
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