Member postings for Haydn Callow

Thanks, I think I understand it now, I’m on the case !

Well, fitted drive belt and the lathe is working pretty much as it should……with the gears as above the saddle wizzes along very fast so I changed the gears as in the photo in this post and it is much better but still much to fast….where do I go from here ? Do I try and source a couple of 20 tooth gears…

another problem is when the lead screw is engaged the part the ‘clutch lever’ engages that carries the bottom gear slowly moves out until the lead screw disengages. I have looked for a grub screw or something to lock it in position but nothing seems obvious.

Edited By SillyOldDuffer on 28/09/2022 18:24:16

The gears are not actually turning on those M10 bolts, I made up some steel sleeves for them…should I make replacements up out of a different metal later ? These are mild steel I think.

Well, now got the basket case together and it’s looking o.k. I have cobbled up some spindles for the gears to spin on, no idea what I’m doing regarding ratios ect… the photos show the present result….all I want is the lead screw to transport the saddle at a sensible speed to work with, can’t actually run the lathe yet as I’m waiting for a drive belt which I should have tomorrow. I have a couple of gears left over so I can alter things if required.

again thanks for all the help from everyone…..

Would there be any point in cleaning up the pressure pad half so it is smooth ?
also if I could cut the thread in the threaded lower half 1mm deeper would that be a good idea ?
I am a retired Dental Tec with 50 years experience and am quite confidant with small hand motors ( like dremel . I think I could with the correct width of cutting disc deepen the thread a little…..of course I could end up with a nackered half nut……

thoughts please.

in the meantime I’ve cleaned everything up and lowered the pressure pad a bit and it does seem o.k.

Lee Roger’s….I think you are spot on once again….thanks. Should I get the pressure pad half back to smooth ?

Hi,

thanks for all the reply’s…I have now discovered that the shiny top half should in fact not have any thread, what you see is where the lead screw over time has worn into it….it’s supposed to be a pressure pad….the lower half is the only part that has a ‘half’ thread. In view of this should I smooth out the top pressure pad and adjust it down a bit..

the lead screw looks to be pretty good.

thanks

So my next question :- can it be repaired ( beyond my ability ) or could I get a replacement ?

Hi, first off a big thank you to everyone who has helped me so far.

new to all this,

bought a Drummond M type in a basket……I now have it built and I know it has been attacked with a hacksaw in the past…..however it is mostly there and it will do what I want.

I have stripped most parts and cleaned and oiled reassembled.

I have just stripped the saddle and in doing discovered what a half nut is.

my question is having never having seen one before :- what do folks think of it ? Worn out, o.k, or good.

if worn out what can I do about it ?

Thanks….got it !

Nick, that is exactly what I need. Many thanks for taking the trouble.
mine doesn’t have the fork that comes off the headstock spindle.

also no 20 teeth beers..but at lease I know what I’m aiming for.

I suppose if I get different gears to transmit power from the spindle to the lead screw it will only affect the speed of the lead screw…..I doubt I will ever be doing any threading on this machine and as long as I can get the lead screw turning at a sensible speed to move the saddle I will be happy….

thanks again

Hi again,

looking at your very detailed photo of your gears/banjo…..my banjo looks a different shape to yours so what you have mau not be possible.

Lovely, thanks….can I be a real pain and ask the size of each gear..?

Sorry , photos in wrong order…..

Worked out how the motor mounts onto the base unit. Now I have to work out how the (I think it’s called ) counter shaft is mounted….I should then get the lathe turning……the last photo shows the ( banjo ) where all the gears need to go to get the lead screw turning….I’m going to have to get a cog on the end of the spindle .a cog on the end of the lead screw and then try and connect them with other cogs….I don’t have any ‘axels ‘ to mount the intermediate cogs on so any photos or drawings would be a big help. thanks in advance

I’ve sorted the gears out, I have :-

2x30

1x35

1x38

1x45

1x50

1x60

they all have a peg sticking out and a hole so they fit together.

non have a cutout for a woodruff key. The end of the lead screw has a woodruff slot so I’m assuming that’s missing. Also missing are the spindles the gears turn on…..anyone out there got a pattern or a drawing / Photo of one? Also the size of the lead screw gear.

thanks

That’s exactly what I did this morning, changed the 4 threads that the head stock bolts into….now metric and all good

I do have the back gear. As said, everything has been modified so it all goes together on the custom made base unit.

Nigel,

thank you for such a informative reply….I have a Myford ML7 and that is complete….I understand now where and what a back gear is….I doubt I will ever need it…..I bought this lathe as a basket case and I’m hoping to get it sorted over the winter…if I decide to sell it I suppose what has been pointed out will reduce the value….however it came with 3 good chucks, a new half hp motor and other bits….I paid £200 so doubt I’ll lose on it and I may keep it.