Member postings for Dibnah

I used pallet banding for a flat belt. It hasn't really had a load test as in cutting chips but it has held and spun under tension with no slip or sign of parting company up to now. It's that uncontrollable stuff you get around heavy parcels etc too. I think it is polypropylene maybe ? I have some on a drum so thought I would experiment with it.

Yes it was very subtle and only with experience some time later I could revisit his words with another meaning.

Thanks Neil, there appears to be a wealth of experience here . Welding like most things ....plenty of practice.

I remember as a young lad getting a job as a welders mate, in the college holidays. It was on a gas plant near Barrow-In Furness. Anyway I asked this old pipe welder "What makes a good welder?" he replied "Having a good grinder"!

Managed to tack the motor & countershaft mount together this evening.

Motor and C.S. bolted to angle iron which uses a piece of box section as a guide, the angle has couple of keepers snug on the rear and raises and lowers for tension by that stud on the top of the mount, through a captive nut. The box section is bolted to a piece of slotted angle shown in earlier pics. Haven't got any belts on but spun the motor up and as yet no out of control vibration. I am trying an idea I had for a flat belt and will reveal shortly what it is, just glued it up and will give it a whirl tomorrow hopefully. Success or failure I will report here. This stuff is so cheap if it is ok I don't mind cutting it off to strip everything down for final weld and paint.

Have edited out backgound junk in the hope it easier to see.

Edited By Dibnah on 22/07/2020 22:07:56

Edited By Dibnah on 22/07/2020 22:09:15

Edited By Dibnah on 22/07/2020 22:11:21

Great suggestion Dave the jockey wheel may be easier to achieve than my initial plan for tensioning. And the rule of thumb info is really useful to know As per your suggestion and Perko I will give it a run and observe before I decide to take a slither off the shoulder.

Good point John and honestly I don't know if the moving in and out of position will affect the Lathe setup. I will have to cross that bridge later. If I do experience alignment issue I may have to relocate other things and leave it permanently on its jacks. Thanks

Ok thanks for that info Perko I think will give it a shot and see how it goes first.

@SillyOldDuffer. Re: my last reply to you.....

"do you think it would be an issue to run 20/40 thou off the shoulder of that gear ? Just to give a tad more clearance."

My thinking is a miss is as good as a mile but I don't know if that applies to drive belts ? I believe the Poly V belt is 3.5mm thick. should be approx 0.8mm of clearance. A touch off the shoulder would improve that a tad but I really don't know how snug these belts get and what the tolerances are when they are in tension and whizzing round at speed.

Ok no probs Dave, like I said I do appreciate the concerns but you are wrong. I'm happy to learn from you guys about lathe specifics but the other stuff I really do know about and didn't wish to be rude in my responses.

Thanks Dave I have addressed stability etc in prior post. I did consider initially placing motor below but as I want to keep the footprint small I would have had to cut away part of tray in order to keep counter shaft in close proximity. No relation but Fred was a legend, I just had that nick name for years. One issue I have run into is depending on type of belt used it is very tight between belt and the rear of the right hand side back gear (When engaged), do you think it would be an issue to run 20thou off the shoulder of that gear ? Just to give a tad more clearance. Another thing I was thinking about is if there is any losses due to the angle of the belts ?

I appreciate the concerns chaps but from here on in you really don't need to raise that issue. I should have said the feedback I am looking for is more to do with particular knowledge about perhaps the belts run better off to the side or don't place motor on side etc etc or whatever little lathe nuance you are aware of. The shape, rigidity, stability type issues of the base are all fine. The size of the wheels are absolutely fine for the surface they are intended for, they cope with the friction for that surface fine and individually rated for 75Kg. Incidentally even those larger castors on my mobile gantry aren't designed for going off road just like the castors on your tool chest, at the single point of contact they rely on a fairly frictionless surface which means even trying to steamroll an m3 nut can draw a halt to rotation. I stress they are only for moving the lathe a short distance from it's storage place and I have said it will be stabilised with Jacks for use (they maybe not too clear in pics but are on there and the final construction will involve longitudinal mechanical connection, so no issue with leveraged rotational or indeed any other forces. I'm confident as I deal with that kind of stuff in working life and maybe I should have been clear about that to avoid this repetition. I promise if I ever get egg on my face and it topples I will post the picture of the plaster cast !

You didn't say the length of belt you ordered for that price but this company might be worth bookmarking.

This size will suit me I think once I have moved things around a bit and it's only £2.78 delivered !

**LINK**

That is definitely good to know and info about the belt sizing that followed. Thanks Martin

Edited By Dibnah on 18/07/2020 08:36:54

Not at the moment ...no but that could change as just been offered a Viceroy. It's like it's just starting to rain lathes in my life ! That can't be such a bad thing can it !?

Cheers Colin

Long live the cows. Cows lives matter

Thanks to Lee & Brian for also popping in here.

I just tacked on a bracket to rear of stand which will hold a vertical frame (that I have yet to make) but managed to clamp on couple pieces of angle iron and clamped motor and countershaft to them to show roughly how they will be when finished. Obviously any thoughts to potential issues would be glad to hear it, the obvious one being ensuring clearance for the back gear shaft and just general accessibility to nuts and bolts on lathe etc.

I plan to sort belt tension between countershaft/headstock and motor/countershaft separately. It looks like previously between motor and countershaft nothing in place. Nothing fancy for that just a slot with captive nut and bolt to apply pressure to countershaft mounts. Then they will both slide in unison like in a lift shaft using the angle frame as a guide. With some stud to lift or lower. A bit like the action of a vice.

Thanks Ady just explained to S.O.D. why I haven't done anything as yet. Only needs longitudinally. Top and bottom is connected front to back. Don't want to be around to experience the forces that will break these welds.

Thanks for both suggestions and info Clive. I want to keep the footprint minimal and be able to move it around easily and just lower the jacks when in use.

Edited By Dibnah on 17/07/2020 19:01:10

Yes agree. I thought I said here but must have been another thread that I plan to make a mechanical connection longitudinally either weld or bolt in the form of a shelf. Maybe even two shelves but wanted to leave that until I'm satisfied with my motor mount plans.