Bendix Sturmey Archer Shimano 24 and 28 tooth rear sprockets

[Old'n'Slow Bikes]

Excellent item! You should do well offering these up. I will message you in order to buy a couple myself as I run F&S hubs on many of my bikes If you could, I suggest also making say a 22 or 24 tooth cog with 1/2 the teeth missing, enabling a "skip-tooth", or one-inch pitch chain to be used. It should be a simple input call out to your machine to do every other tooth, making it a Skip Tooth, or 1" pitch instead of 1/2" you show above. Any even-toothed cog can have 1/2 the teeth removed to be able to run a 1" pitch chain...stainless? Even better I am in.. Below is a hand-converted modification of a 1/2" pitch cog on the larger center opening Sturmey version..
View attachment 2180231

Thanks for the good words! I will try the 'Skip-tooth' next. I had been contemplating that. I haven't made the cogs in 22" as there seems to be a pretty good supply of those, and the decorative designs just kind of get lost in a cog that small.

 

[bicibob]

I'd like one of each please. I'll send you a PM. Great idea!

 

[SKPC]

Correct, there are many of these 3-tab Sturmey/Bendix cogs in 22-tooth out there fairly cheap, but you have to modify them in order to run a 1" pitch chain. The other "new" 3-tab 1" pitch cogs available online are made of soft metal, so I think that 22-26 tooth (11-13) in both chain pitches would sell very well.

 

[Old'n'Slow Bikes]

Correct, there are many of these 3-tab Sturmey/Bendix cogs in 22-tooth out there fairly cheap, but you have to modify them in order to run a 1" pitch chain. The other "new" 3-tab 1" pitch cogs available online are made of soft metal, so I think that 22-26 tooth (11-13) in both chain pitches would sell very well.

I am really new to the classic bike scene. I mean I grew up in the 60's, but if you didn't have a banana seat bike with hi-rise bars, you were an outcast! So..., what is the attraction or cool factor of the 1" pitch chains? Are they from a certain era of cycling?

 

[SKPC]

They have been used since the teens up to the War and after on most everything. Many will modify and upgrade their skip tooth bikes with multi speed hubs to make them more rideable and they are looking for larger 3-tab style sprockets like yours in both formats, 1/2" & 1". Bigger, 1/2" pitch sprockets like yours are not really around much. The 3-tab design you have is only one of many sprocket attachment strategies..

 

[Archie Sturmer]

So..., what is the attraction or cool factor of the 1" pitch chains?

They simply fit the cool 1" pitch front sprockets (big sprocket).

Larger rear sprockets may look cool too, and are functional, but roughly only about ~1/4 as visible as the front.

 

[WillWork4Parts]

To add to that...the front inch pitch sprockets are typically 26t and 24t on mens' bikes and kids riding these back in the day had legs that didn't care to tire out. The rear sprocket to match was typically a 10t and those are absolutely plentiful and hard to sell even. Ha. The 12t inch pitch sprockets are hard to come by. They're usually threaded too with a few different diameters and pitches, that would probably be a hassle to keep up with and replicate threads on such thin material.
I agree, the guys looking to tackle hills on these earlier bikes are probably interested in these sprockets for multi speed hubs with the 3 tabs like you've got. Skip tooth(inch pitch) just opens up that many more options for us!

 

[Old'n'Slow Bikes]

To add to that...the front inch pitch sprockets are typically 26t and 24t on mens' bikes and kids riding these back in the day had legs that didn't care to tire out. The rear sprocket to match was typically a 10t and those are absolutely plentiful and hard to sell even. Ha. The 12t inch pitch sprockets are hard to come by. They're usually threaded too with a few different diameters and pitches, that would probably be a hassle to keep up with and replicate threads on such thin material.
I agree, the guys looking to tackle hills on these earlier bikes are probably interested in these sprockets for multi speed hubs with the 3 tabs like you've got. Skip tooth(inch pitch) just opens up that many more options for us!

Thanks for the info! I will talk to my laser programmer (my son is the programmer!) tomorrow at work. Most guys on here are going to want the Circle cut out pattern huh? or maybe a elongated oval like a Sturmey hub? Not so much the 'custom' hearts and such?

 

[WillWork4Parts]

I'd buy one of the heart sprockets in inch pitch to match the front...found on a lot of Schwinns, Colson and Huffman had a similar sprocket up front too.

 

[Miq]

I’m in for a 24T Sturmey 1/2” pitch.