Search found 1487 matches

by John Hasler
Sun May 17, 2020 2:37 pm
Forum: Lathes
Topic: Need help with lathe finish
Replies: 21
Views: 3163

Re: Need help with lathe finish

kenickie22 wrote:
Sun May 17, 2020 11:54 am
Is the generated leg the one that checks 240v to ground?
Yes.
by John Hasler
Sun May 17, 2020 11:54 am
Forum: Welding
Topic: Tig welding a tractor part?
Replies: 15
Views: 2855

Re: Tig welding a tractor part?

If it's cast iron braze, don't weld. I think it is probably steel, though. I can't see making that part iron.
by John Hasler
Sun May 17, 2020 9:30 am
Forum: Welding
Topic: Tig welding a tractor part?
Replies: 15
Views: 2855

Re: Tig welding a tractor part?

Peen the weld and the heat affected area.
by John Hasler
Thu May 14, 2020 12:36 pm
Forum: Lathes
Topic: Need help with lathe finish
Replies: 21
Views: 3163

Re: Need help with lathe finish

That's my #1 suspect as well.
by John Hasler
Wed May 13, 2020 7:07 am
Forum: Lathes
Topic: Need help with lathe finish
Replies: 21
Views: 3163

Re: Need help with lathe finish

That screw that is black, is loose! It will create a high resistance connection and an imbalance of your motor electrical system. You need to pull it apart and clean the wire, the contact pads and maybe replace the screw. That should help a lot. Also apply anti-oxidant grease. It would be best to i...
by John Hasler
Mon May 11, 2020 8:20 am
Forum: General Discussion
Topic: If a lathe, horizontal mill and a radial arm drill had a baby
Replies: 2
Views: 1078

Re: If a lathe, horizontal mill and a radial arm drill had a baby

The triangular gib is also an interesting and elegant mechanism.
by John Hasler
Sun May 10, 2020 10:18 am
Forum: Lathes
Topic: Radius Knurling.
Replies: 20
Views: 3182

Re: Radius Knurling.

I found a discussion of the grinding of taps that calls what I think you mean by "back relief" "radial relief", which makes more sense to me. What I called "back relief" I guess would be more properly described as "flank relief". I can see now that Clickspring's tool has no radial relief as machined...
by John Hasler
Sat May 09, 2020 7:44 pm
Forum: Lathes
Topic: Radius Knurling.
Replies: 20
Views: 3182

Re: Radius Knurling.

Cutting past the center line will have made the angles where the turned shape meets the face slightly acute. The flank angles lack face relief, though. I think it just wasn't very sharp. Having seen his (I don't claim I would have thought of this the first time either) I think that if I were to make...
by John Hasler
Sat May 09, 2020 5:47 pm
Forum: Lathes
Topic: Radius Knurling.
Replies: 20
Views: 3182

Re: Radius Knurling.

I just see him honing the front flat, but watching more closely I see that front relief comes from his having cut past the center line on the mill. That should also have provided a bit of flank relief if I am visualizing the geometry correctly.
by John Hasler
Sat May 09, 2020 5:25 pm
Forum: General Discussion
Topic: 4-way toolpost build
Replies: 13
Views: 2315

Re: 4-way toolpost build

Why not space the clamping bolts evenly? So that each bit will have two screws on it spaced as far apart as they can be. Steve By using #10s I was able to put a screw in each corner plus two more per side for a total of 12. That way each side has four screws that can be used. I've been using this t...
by John Hasler
Sat May 09, 2020 4:55 pm
Forum: General Discussion
Topic: 4-way toolpost build
Replies: 13
Views: 2315

Re: 4-way toolpost build

I prefer square headed bolts, socket head tend to fill with chips, especially machining brass. I have this problem with the compound attaching allen head bolts filling up with chips, have to regularly clean them out with compressed air, annoying. That's a good point. I wish I had used square-headed...
by John Hasler
Sat May 09, 2020 8:24 am
Forum: Lathes
Topic: Radius Knurling.
Replies: 20
Views: 3182

Re: Radius Knurling.

Harold_V wrote:
Sat May 09, 2020 1:46 am
He'd have enjoyed much better success with his cutting tool had he relieved it properly.

H
I assume you refer to the lack of front relief?