Model Railway Forum

hi its me agaln i have a west country / battle of britain which has a motor which is on its last legs and is in need of replacement i have sourced replacement and want to know if it is much of a job to replace the worm gear as the replacement comes without one regards bob

Mod Note> Topic moved from DCC area to the On the Workbench section of the forum

Best done with a gear puller...

What are the two angled screw/adjusters for RAF?

bobclifford1953 wrote: ↑Sat Aug 21, 2021 7:21 pm hi its me agaln i have a west country / battle of britain which has a motor which is on its last legs and is in need of replacement i have sourced replacement and want to know if it is much of a job to replace the worm gear as the replacement comes without one regards bob

If you are looking to salvage the old gear to put on the new motor and it is brass then I would try a hot air gun on it with any luck it will just drop off. Install it while it is still hot by the time it is cool it will be a tight fit on the shaft.

PS handle the hot item with some pliers but be careful not to damage the teeth

Richard

Tricky Dicky wrote: ↑Tue Aug 24, 2021 1:58 pm If you are looking to salvage the old gear to put on the new motor and it is brass then I would try a hot air gun on it with any luck it will just drop off.

Much more fun with a cigarette lighter!
https://youtu.be/XOS_rTMnLyA

teedoubleudee wrote: ↑Tue Aug 24, 2021 12:36 pm What are the two angled screw/adjusters for RAF?

Spare mandrels for different size shaft diameters. Replace the in-use mandrel as required, by screwing into the main Tee driver.

RAF96 wrote: ↑Wed Aug 25, 2021 10:02 am

teedoubleudee wrote: ↑Tue Aug 24, 2021 12:36 pm What are the two angled screw/adjusters for RAF?

Spare mandrels for different size shaft diameters. Replace the in-use mandrel as required, by screwing into the main Tee driver.

Gotcha thanks.

teedoubleudee wrote: ↑Wed Aug 25, 2021 10:13 am

RAF96 wrote: ↑Wed Aug 25, 2021 10:02 am

teedoubleudee wrote: ↑Tue Aug 24, 2021 12:36 pm What are the two angled screw/adjusters for RAF?

Spare mandrels for different size shaft diameters. Replace the in-use mandrel as required, by screwing into the main Tee driver.

Gotcha thanks.

The thin mandrel was very soft and bent then broke off, so I had to drill the mandrel body out to take a hardened steel rod in lieu. The heavier mandrels haven't seen any use yet.

RAF96 wrote: ↑Tue Aug 24, 2021 8:24 am Best done with a gear puller...
DB182B93-13BF-4EFB-BC84-20A8BA6B7C64.jpeg

That looks quite good - where did you find it?