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Title: Gearbox Identification
Post by: bob64 on 14 Feb 2009 at 14:47

Can anyone help identify this gearbox found in an old barn which has been suggested came from a Douglas. It has the marking PATENT H 5007 it's appears to be 2-speed with ratios of 1:1 or 1:0.6 the output shaft on the opposite side being lefthand thread and a number 163 stamped on both castings. Hope the photo helps.

(https://www.douglasmotorcycles.net/aa-files/images/bob64/2009/gearbox-750.jpg)

Title: Re: Gearbox Identification
Post by: graeme on 14 Feb 2009 at 22:47

Most definitely a Douglas gearbox, but it is a 3 speed. It is from a 3 1/2hp or early 4hp machine with the cone clutch on the final drive side of the box. I'm sure there will be plenty of people interested in acquiring it!
Cheers, Graeme

Title: Re: Gearbox Identification
Post by: Alan Cun on 15 Feb 2009 at 10:29

Heh Bob, Nah forget it???? Guess we knew it would end up on ebay. I would have paid around Aust $400 lets see what it brings????????/

Title: Re: Gearbox Identification
Post by: bob64 on 15 Feb 2009 at 15:00

Thanks for all the help, I've checked again and it is a 3 speed with ratios of
approximately 1:1.5 , 1:1 and 1:0.75.

Title: Re: Gearbox Identification
Post by: Alan Cun on 02 Mar 2009 at 09:00

Hello All, From where I looked on ebay the said 4 hp box has expired with out a bid. Like I say A $ 400 would have been the price I would have paid had the location been in Aust or NZ. I am in no hurry one will come one day or an alternate transplant will take place. regards Alan

Douglasmotorcycles.net

Reference => Identifying Douglas Motorcycles => Topic started by: bob64 on 14 Feb 2009 at 14:47