Author Topic: OHV Douglas  (Read 598 times)

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Offline Cliffy73

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OHV Douglas
« on: 15 Oct 2022 at 18:51 »
Evening all. Has anyone got a rear hub for an OC or DT/SW5 they would like to sell. I require one for finishing my bike. Cheers Chris.

Offline Doug

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Re: OHV Douglas
« Reply #1 on: 16 Oct 2022 at 12:24 »
Chris,

The DT hub is much wider than the OC or SW5, so you don't want that if building a road bike with a brake drum. The OC & SW5 used the standard hub as per the 600EW, S6 and derivatives, the mid-thirties heavyweight models, and the Aero models. It was also used on the lightweight models from 1931 onward (and some earlier than that). So quite a few potential donors.

-Doug

Offline cardan

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Re: OHV Douglas
« Reply #2 on: 17 Oct 2022 at 03:12 »
Are they the hubs on this CW project? https://www.douglasmotorcycles.net/index.php?topic=9276.0

Leon

Offline Doug

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Re: OHV Douglas
« Reply #3 on: 17 Oct 2022 at 04:46 »
Leon,

Almost. The CW (and the OB) had a narrow conical spline since it only mounted a sprocket. When Douglas switched to a brake drum for the 1926 big twins they made the conical spline half again wider. And that was the design they carried one with to 1938. 

-Doug

Offline Hutch

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Re: OHV Douglas
« Reply #4 on: 17 Oct 2022 at 05:39 »
Also OB rear hub  is wider than the front, CW are same front and rear.
-Hutch