Harrison L5 lathe rebuild

[Micktoon]

Good Evening All , Well at long last I have got a bit more done to the Harrison. I have done various things without photos , like diamond filing the burs off every single cog tooth in the whole gearbox ....... not a five minute job , I have all new bearings for the spindle and new oil seals and generally cleaned and inspected everything. I managed to get the gear cog I needed to replace because of chipped teeth, thanks are due to Peter ( Bacup Hillbilly ) who had a spare gear cog and shaft , the holes in the clutch plates are oval and the pins worn, this was making the clutch grab and sometime not disengage , I have got new roller bearing pins and Rob Wilson is kindly going to drill and press the new pins in ( I was not confident of doing a good job of it ) Cheers Rob. The other part that was worn was a brake pad disc that is operated by the clutch lever, I did not even know it was there so have never used it ! It had wore down to the countersunk fixing bolts was was steel on steel not bronze on steel. The original was made of a bronze type brake material with particles inbedded in it, I could not get any of this so have made one out of bronze, it should still do the job.

This is the worn out part, the three holding coutersunk set screws had just been rubbing.


2 inch bronze bar, skimmed to size.


Drilled out in a couple of stages to almost the right ID , the drill is car boot job , rusty but sharp where it counts !


I marked out the three holes and drilled them on the Bridgeport.


I then skimmed the top surface so it was the right depth to the countersink s, then parted off.


The new disc in place along side the old one, its only after looking at this photo I think I might mill the three recessed flats into it as per the original so it has even contact with the steel collar it presses against , as it is it might wear uneven around the holes ? it wont do any harm to do it anyway.


Cheers Mick