Search found 1561 matches

by Torch
Fri Aug 07, 2020 8:17 am
Forum: 3-in-1 Metalworking Machines
Topic: replacing lathe bearings on 9729
Replies: 10
Views: 225

Re: replacing lathe bearings on 9729

I wonder if the bearings are 2007109 and 2007108.

That is what is used on a nearly identical Chinese-branded machine. They are all made in the same factory. But don't bet the farm on those numbers, they do make changes on the fly!
by Torch
Fri Aug 07, 2020 7:34 am
Forum: 3-in-1 Metalworking Machines
Topic: replacing lathe bearings on 9729
Replies: 10
Views: 225

Re: replacing lathe bearings on 9729

Ooops, sorry. I was thinking of the G4791 for some reason. My bad. The spindle bore on that one is bigger so the bearings will be too.

However, the preload procedure is probably similar.
by Torch
Fri Aug 07, 2020 6:48 am
Forum: 3-in-1 Metalworking Machines
Topic: replacing lathe bearings on 9729
Replies: 10
Views: 225

Re: replacing lathe bearings on 9729

The parts list shows the bearings as a 7112 and a 7110. Those are not sealed, but are angular contact bearings and you could get the dimensions from an on-line catalog.

I believe the manual is downloadable from Grizzly, and documents the correct pre-load procedures for the lathe bearings.
by Torch
Mon Aug 03, 2020 6:12 am
Forum: 3-in-1 Metalworking Machines
Topic: 9729 control knobs
Replies: 11
Views: 628

Re: 9729 control knobs

I'm looking forward to seeing them.
by Torch
Mon Aug 03, 2020 6:11 am
Forum: 3-in-1 Metalworking Machines
Topic: smoke coming out of 9729 lathe motor connector box
Replies: 6
Views: 249

Re: smoke coming out of 9729 lathe motor connector box

Those motors are 3/4 hp AC induction TEFC motors, correct? Probably the thin varnish insulating the windings has deteriorated from heat over time and now one or more windings are shorting. The motor will not last much longer. You could get it rewound if there is a motor or armature repair shop in yo...
by Torch
Sat Jul 18, 2020 3:53 pm
Forum: 3-in-1 Metalworking Machines
Topic: 9729 control knobs
Replies: 11
Views: 628

Re: 9729 control knobs

I can do that, yes, but I'd rather buy if I can and spend my turning/milling time doing other things. As you wish. Personally, I have found it faster to whip out my own knobs than to seek them out, order them, wait for delivery. I could have made a few nice knurled knobs with set screws in less tim...
by Torch
Sat Jul 18, 2020 11:03 am
Forum: 3-in-1 Metalworking Machines
Topic: 9729 control knobs
Replies: 11
Views: 628

Re: 9729 control knobs

You have a lathe an a mill. Make whatever you want!! ;-)
by Torch
Sun Jun 14, 2020 7:06 pm
Forum: 3-in-1 Metalworking Machines
Topic: Bolton at-520 cross slide nut
Replies: 8
Views: 2040

Re: Bolton at-520 cross slide nut

If you change to a metric thread, you will have to change all your change gears too. A different pitch would result in wildly inaccurate threads!

My lead screw (and I suspect many others from China) is a strange hybrid -- it's actually a metric diameter with an 8tpi pitch.
by Torch
Sat Jun 13, 2020 10:32 am
Forum: 3-in-1 Metalworking Machines
Topic: 4 jaw chuck on a HF 44142
Replies: 12
Views: 4589

Re: 4 jaw chuck on a HF 44142

The other areas often are of interest to 3-in-1 owners. After all, if you own a 3-in-1, you own a lathe and you own a mill. So those areas may be useful too.

Granted, as a 40 year retired machinist, you may spend more time answering questions than asking them. ;-)
by Torch
Sat Jun 13, 2020 5:15 am
Forum: 3-in-1 Metalworking Machines
Topic: 4 jaw chuck on a HF 44142
Replies: 12
Views: 4589

Re: 4 jaw chuck on a HF 44142

Do you mean the 3-in-1 section? Yeah, it's been pretty quiet of late. Other areas seem to have regular traffic though. Speaking personally, I often find my questions are already answered with a quick search. So I do more lurking than posting now. I jump in if I see a question that I can answer. But ...
by Torch
Thu Jun 11, 2020 10:17 pm
Forum: 3-in-1 Metalworking Machines
Topic: Way Wipers for 3 in 1!
Replies: 8
Views: 879

Re: Way Wipers for 3 in 1!

I might have -- I don't remember anymore. It's also possible that the holes were pre-existing.
by Torch
Thu Jun 11, 2020 3:02 pm
Forum: 3-in-1 Metalworking Machines
Topic: oil for headstock
Replies: 17
Views: 8367

Re: oil for headstock

I use Amsoil "Super Shift" synthetic transmission fluid.

I figure it's for gears in high-torque applications. And temperature stable for those mid-winter days in a cold shop. ;-)