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Metric Roller Chain Sprocket

E20B21

Metric Roller Chain Sprocket
Item #100967478
  • 20B-3 Chain Number
  • 3 Strands
  • 21 Teeth
  • Without Hardened Teeth
  • B Sprocket Style
  • 25 mm Minimum Bore
  • 98 mm Maximum Bore
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Metric Roller Chain Sprocket
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    Shipment Options
  • 20B-3 Chain Number
  • 3 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
Martin No. 20B21
Pin Diameter 19.05 mm
Inch/Metric Metric
Length Through Bore 115.01 mm
Bore Style Minimum Bore
Pitch Diameter [Min] 213 mm
No. of Strands Across 3
Bore Range [Min] 25 mm
Chain Pitch 31.75 mm
Pitch Root Diameter 194 mm
Caliper Diameter 193.38 mm
Single Strand Tooth Thickness 18.19 mm
Pitch Diameter 213 mm
Sprocket Style B
Width Across Teeth 91.08 mm
Outside Dia. [Min] 233.66 mm
Bore Type Reborable
Chain No. 20B, 20B-3
No. of Teeth 21
Root Diameter 194 mm
Hub Length Thru 96.81 mm
Series B
Family Name No. 20 - 31.750 mm Pitch - Triple - Type B & C
Bore Range [Max] 98 mm
Hub Dia. 140 mm
Material Steel
Outside Dia. 233.66 mm
Hardened Teeth Without Hardened Teeth
Weight 51.5 LB
EAN or UPC 697950405292
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