Member postings for Ronen Burstein

Hi there

I need advice please.

I want to build a pulley like the attached image. What material I shall use for the inner spacer?

Also, what tolerance between bearing and inner socket wall?

Ronen

Thanks Brian

And the rest of you guys. it is always plesent to post a Q on that forum.

Ronen

Thanks guys.

I think I will go to the simple / primitive approach and will give a go to the hand winding machine.

However to coil it tight and then pull it, pose a problem, as because its diameter (3mm) I sort of need to do it while it’s red hot and that make it difficult to evenly space the pitch.

Ronen

Hi everybody

Thanks so much for your reply, much appreciated.

I think I miss lead you somewhat. What I need is that:

I need to make a six revolution cork screw from 3mm music wire with 2.5mm inside diameter. It is for making rustic wine cork screw opener.

The Idea is attaching 2.5mm rod to hand drill and bends the wire around it six times. Now I have found that if I turn the drill handle 13/8 of revolution it will revolve the drill head six times. The trick is to advancing the wire while it revolves around the 2.5mm fixed rod, in steady travel distance. The pitch of the screw that I need is 9mm.

So I thought that I need to attach a pinion & rack mechanism to the drill and the rack will push the music wire in constant travel speed to give me the pitch I need.

I don’t know how to calculate the dimension of the P&R that revolves by the motion of the drill, so it will travel in the speed I needed.

Ideally I would like to make it on my lathe but too old to do the gears train calculation to give me screw / spring of 9mm pitch with 3mm wire and 2.5mm inside diameter.

Attached two photos that might help to understand what I am up to, the primitive way.

Thanks

Ronen

Hi there

Maybe it’s not related to that forum but, alas,

I need to build a machine that revolve steel rod six times and at the same time advance it 9mm per one all revolution.

I sketch the machine but can’t put my head to calculate the gear.

I use hand drill for the rod revolving and I know that if I revolve the drill handle one all revelation and 5/8 of an all revelation the rod that attached to the drill will revolve six times.

I want to attach a Rack and pinion to it (to the drill gear) that will advance to rod: 6 x 9mm = 54mm.

It is to making screws.

Regards,

Ronen

Thanks for all your reply.

Ronen

Thanks again for your reply. Fantastic.

But if I may, one more Q. Is there optimal spindle speed for fine cut in mild steel or once i set the gear for factory fine cutting it will cut fine no matter what spindle speed?

Ronen

Hi There

Thank you all very very much for your replay. I think the problem must have been because of me putting back the gears wrongly. I am not sure that i can see in the manual the original setting but i will contact Warco for that.

Thanks again for all your replay. I got a lot of tips & trics out of it.

Regards

Ronen

Hi There

New to the forum and to working with lath. I recently bought a Waco WM240B Belt drive lathe.

It worked well in a sense that it gave my smooth fine surface. But the other day I change gears for thread cutting, then change it back to the original setting (presumably) and ever since i got very raged surface finish even thug i am using the automatic feed. When it got to the end i disengage the cutting head and manually bring it back to the beginning. During the path back i can see that the cutting head still cutting the metal? (See attached photo). Any idea what wrong?

Thanks

Ronen