Steven Meixner Posted November 20, 2021 Share Posted November 20, 2021 Please help identify rear sprocket. Link to comment Share on other sites More sharing options...
TerryB Posted November 20, 2021 Share Posted November 20, 2021 What is the diameter? Sure looks low on teeth count to be a rear sprocket Link to comment Share on other sites More sharing options...
Steven Meixner Posted November 20, 2021 Author Share Posted November 20, 2021 Terry, I understand what you're saying. Will measure tomorrow, but would guess 3 1/2" to 4". Maybe it's a front sprocket which would explain the small bore. Maybe 3/8" bore. Link to comment Share on other sites More sharing options...
TerryB Posted November 20, 2021 Share Posted November 20, 2021 I rode motorcycles starting in the late 1960s up to 2012 including street and off road. The tooth count is more like a front sprocket than rear, especially with the attachment configuration but even that is unusual for anything I’ve ever encountered. Link to comment Share on other sites More sharing options...
edinmass Posted November 20, 2021 Share Posted November 20, 2021 Looks like it’s off early machinery. Probably a farm implement. Link to comment Share on other sites More sharing options...
Steven Meixner Posted November 20, 2021 Author Share Posted November 20, 2021 OD of teeth is 3 1/2". ID is 3/8". I showed this picture to 2 very knowledgeable early motorcycle guys. Both agreed its motorcycle, just couldn't put there finger on correct application. Link to comment Share on other sites More sharing options...
TerryB Posted November 20, 2021 Share Posted November 20, 2021 Has to be real early in the use of chain rather than a leather belt which might limit it to a handful of makes. Ed and I are later generation motorcycle guys. My first thought was like his, farm or industrial use. In most applications the smaller number of teeth is a for front sprocket. Rear sprockets generally have more teeth and are larger in diameter. Link to comment Share on other sites More sharing options...
Larry Schramm Posted November 20, 2021 Share Posted November 20, 2021 (edited) The part is off an early 1950's Schwinn bicycle. It is called a skip link sprocket. Edited November 20, 2021 by Larry Schramm (see edit history) 1 Link to comment Share on other sites More sharing options...
Steven Meixner Posted November 20, 2021 Author Share Posted November 20, 2021 Larry, does yours have the threaded portion as mine? Link to comment Share on other sites More sharing options...
TerryB Posted November 20, 2021 Share Posted November 20, 2021 Rear bicycle would make more sense since the small sprocket would be on the rear. I saw similar sprocket without the mounting on a Google search but it did not have a mounting setup like this sprocket. Link to comment Share on other sites More sharing options...
Larry Schramm Posted November 20, 2021 Share Posted November 20, 2021 12 minutes ago, Steven Meixner said: Larry, does yours have the threaded portion as mine? The rear spiral thread is used for the coaster brake. When peddling forward, the bike moves forward. When the coaster brake is applied, there is another part that moves away from the sprocket and applies force the plates in the rear drum to stop the bike. The coaster brake is similar to a hydraulic clutch in a transmission except it is mechanical. 1 Link to comment Share on other sites More sharing options...
Steven Meixner Posted November 20, 2021 Author Share Posted November 20, 2021 Looks like Larry nailed it. Thanks 1 Link to comment Share on other sites More sharing options...
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