Skip to content Skip to navigation menu
No. 40 - 1/2" Pitch - Single - Bored to Size Sprocket

40BS21 1

No. 40 - 1/2" Pitch - Single - Bored to Size Sprocket
Item #100807065
  • 40 Chain Number
  • 1 Strand
  • 21 Teeth
  • 3.617 in Outside Diameter
  • 1 in Finished Bore
  • Without Hardened Teeth
+ Show More + Show Less
No. 40 - 1/2" Pitch - Single - Bored to Size Sprocket
Price Unavailable
Price Unavailable
Pricing is unavailable at this time. Please contact Customer Service for assistance.
Online Ordering Restricted
Please contact Customer Service for assistance.
Contact Customer Service
    Shipment Options
  • 40 Chain Number
  • 1 Strand
  • 21 Teeth
  • 3.617 in Outside Diameter
  • 1 in Finished Bore

features

  • Conforms to ANSI B29.1-1975 standards
Single Strand Tooth Thickness 0.284 in
Hub Length Thru 0.716 in
No. of Screws 2
Chain Pitch 1/2 in
Material Steel
Keyway w/Keyway & Set Screw
Length Through Bore 1 in
Pitch Diameter 3.355 in
Bore Type Bored to Size
Chain No. 40
Width Across Teeth 0.284 in
No. of Teeth 21
Martin No. 40BS21
Pitch Diameter [Min] 3.355 in
Inch/Metric Inch
Set Screw Size 5/16-18 X 5/16
Hardened Teeth Without Hardened Teeth
Sprocket Style B
No. of Strands Across 1
Outside Dia. 3.6170 in
Hub Projection 0.72 in
Outside Dia. [Min] 3.6170 in
Caliper Diameter 3.0334 in
Keyway Size 1/4 x 1/8
Hub Dia. 2 3/4 in
Finished Bore 1 in
Weight 1.59 LB
EAN or UPC 697950148724
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison