Member postings for Lathe-argic

Thanks Clive, all sorted.

Apologies if this is in the wrong section. Does anyone know where I can purchase 33T & 34T gears for metric screw cutting on a Myford Super 7 with gearbox?

I've had a good scout around on the net with no joy.

Many thanks in advance.

Tim

Thank you to everyone who is contributing. I feel well eqiuiped now. Will, the drawing you posted is a great form of reference.

I'm opting to skim a small block of mild steel using the vertical slide. My inclination was to use a 4 flute cutter, however I have read opinions to the contrary. By drilling the bolt hole prior to skimming to alleviate the load (as Ian recommended in an earlier post), I thought a 4 flute end mill would be adequate and give a more refined surface finish. Given this will be my first milling experience, with a preference to making smaller passes.

I don't have any literature on milling so I'll be off to the library this week. Suggestions welcome.

Many thanks,

Tim

John, I certainly don't want to make things difficult so mild steel it is.

Ian, that makes the process seem very straight forward (famous last words) even for a simpleton like me.

Many thanks

Okay, firstly thank you to everyone who replied. I'll take on board all the suggestions. I appreciate it's probably a very easy part to engineer in principle. I don't have access to a milling machine, however I do have a vertical slide. So, correct me if I'm wrong, I should be able to hold a bar of silver steel in the vertical slide, using a milling attachment in the lathe chuck, and mill a recess to form a u-shape or clevis. Then I can drill a hole for the bolt. Apologies, I was suffering from a lack of confidence mainly due to inexperience. I realise this is prohibitive to learning.

Sandgrounder, thank you for posting the link to the pictures of the attachment. It's very helpful to see how it was installed. I was concerned about the tension and the leverage required for the chuck to operate effectively.

Swarf, mostly, thanks for posting the schematic and other images. Incidentally, mine came with the attaching bracket visible in the second picture (brown background with allen key). I'll have a close look to see if I could engineer it to fit somehow.

In summary, I will hit the drawing board and post the results and conclusions. Once again thank you for everyone's input. I'm slightly overwhelmed by the number of people willing to contribute . Legends!!

Many thanks,
Tim

Edited By Lathe-argic on 06/05/2021 21:59:40

Edited By Lathe-argic on 06/05/2021 21:59:56

Edited By Lathe-argic on 06/05/2021 22:00:34

Edited By Lathe-argic on 06/05/2021 22:01:01

Hi,
I recently bought a myford quick release collet chuck for my barely used (complete novice) Myford Super 7. It came with an earlier ML7 attachment which does not fit. Does anyone know where I can by the clevis and bolt, or a similar alternative, which goes through the headstock housing?

Many thanks in advance.

Tim

Thanks for all your help. I managed to engage the apron to the lead screw by unwinding the spring loaded screw (as far as it would go) for the half nut adjustment. This seemed counter intuitive and I feel a little stupid for not trying it earlier. I would say that the bond feels decidedly weak between the half nut and lead screw. The half nuts probably need a good clean or even replacement.

Bizarrely though another problem surfaced. When I ran up the lathe the lead screw remained motionless. I fiddled around with lead screw handwheel and it seem to locate on a gear in the gear box and started working again.

Thanks to all for your responses.

David, I'm based near Sudbury in Suffolk. Ideally I want to turn a screw for a workbench but more importantly I'm interested in learning the skill.

Bazyle, It has a lever. When I press the lever down I can see the half nuts closing down on the lead screw but the apron's not moving when engaged.

John, The lead screw is turning when the chuck is turning. I'm thinking that maybe a gear has slipped or maybe broken teeth on the gears inside the apron assembly.

Many thanks

Edited By Lathe-argic on 28/05/2020 14:51:52

As a precursor I am a complete beginner. Apologies in advance for the use of incorrect terminology. I recently inherited a Myford Super 7 lathe with what appears to be a problem. When I engage the cam lever on the apron to automatically travel the length of the lead screw it doesn't move. I can move it manually using the handwheel at the back. The lead screw itself is turning as it should and the lathe is set at a low speed. I have tried adjusting the spring loaded screw to raise and lower the half nut on the underside of the apron but that made no difference. I can't really see well enough ito check inside to see if the thread is okay or not. Any thoughts or advice as to what I should check first and where to go from now? Thanks in advance