Member postings for Brian Jopling

Somebody must have seen/filled a Thetford 2". Help

Brian

Having retired late I hoped to start a traction engine project. However health has meant a change in plans so I have cheated and bought at auction a very well made 2" Thetford. I am looking for some help.

I intend to run on air to start but would like advice on filling the boiler to make sure the water jacket is full. I cannot see a hand water pump.The engine came with a bicycle pump which may or may not be part of the plan.

regards Brian.

PTFE, very good for bearings but expensive, has a greasy feel is almost (always?) a off dull white shiny finish and is heavy compared to nylon, acetal, pvc.Bit heavier than Delrin but easy to confuse. PTFE machines very well and takes a good finish with a hss flat or slightly negative rake tool with a stoned radius. Back off drills or they will pull in (same as brass)

Do not inhale dust or fumes - wet polish and grind only

Jopo

I would be very wary of inhaling burnt of burning plastic. Many are very toxic

Jopo

John. Time for serious thought methinks.

Jopo

Thanks for that John. My bed lead screw is in v. good condition and I would like to try the fitting of a speed control to the feed motor first. My plan would be to fit the fastest gear train and vary that.

Would like to know how you get on with your mod - in case!

I also intend to find a suitable dro kit but would dearly love to find a sensitive vertical head (if such a beast exists).

Jopo

I have a Harrison universal mill and the cross lead nut is worn. Anybody know where spares might be available - or will I have to machine a tap to make a new one.

The feed is a seperate motor driven gear box with change wheels - which is a a pain. Anyone converted this to a variable 3 ph speed drive who could give some advice?

Jopo