Search found 1276 matches

by pete
Fri Nov 17, 2017 8:27 pm
Forum: General Discussion
Topic: Note on Jacobs chucks
Replies: 13
Views: 340

Re: Note on Jacobs chucks

Hi Dave, I bought 3 of Glacern Machine Tools integral shank keyless chucks. Two of them with an R8 taper and one with an MT 3 for the lathe. That was 6-7 ? years ago so no telling if there using the same manufacturer or not. All 3 tested to about .0015" runout with one R8 running just barely ov...
by pete
Fri Nov 17, 2017 2:23 am
Forum: Milling Machines
Topic: Grizzly mini-mill & resonance?
Replies: 15
Views: 243

Re: Grizzly mini-mill & resonance?

There's some very detailed information about using an epoxy and granite mix on various machines and up to building complete machine parts by casting it into forms with it over on the CNCZone Dianne. Lot's of posts about it with mixture ratios by weight so it's correctly done. I think it would take s...
by pete
Thu Nov 16, 2017 8:13 pm
Forum: Milling Machines
Topic: Grizzly mini-mill & resonance?
Replies: 15
Views: 243

Re: Grizzly mini-mill & resonance?

Column rigidity on these mini mills is a massive problem due to the built in design flaws Dianne, I've owned one. Tool extension as Spro mentioned also has a large effect. And as you described taking that last narrow cut can cause vibrations as the material is ripped off. After more time than I'd ca...
by pete
Thu Nov 16, 2017 7:01 pm
Forum: Lathes
Topic: Large Radius Turning
Replies: 3
Views: 276

Re: Large Radius Turning

Very clever and well thought out Russ. I've read a few times about center drilling the tailstock side of the carriage and doing the same at the correct matching elevation on the front of the tailstock much like John mentioned and using a pointed rod. But your method makes no permanent changes and as...
by pete
Thu Nov 16, 2017 6:40 pm
Forum: Lathes
Topic: Large lathe levelling
Replies: 15
Views: 534

Re: Large lathe levelling

Fwiw I just watched Tom Liptons lathe leveling video on his Oxtools Youtube channel last night. I think it's just what your looking for Weedy. Properly aligning and testing a machine tool is a far more complex topic to understand than it first seems. In 1927 Dr. Georg Schlesinger pretty much wrote t...
by pete
Thu Nov 16, 2017 5:38 pm
Forum: General Discussion
Topic: Brown and Sharpe Micrometer
Replies: 4
Views: 204

Re: Brown and Sharpe Micrometer

B & S is a pale shadow of what it once was that's for sure. They designed and made some top quality and innovative products. For metrology items they were probably equal to Starrett for the amount they made and the quality. I've got a B & S 558 cylindrical square that's unlike any others I k...
by pete
Thu Nov 16, 2017 5:20 pm
Forum: General Discussion
Topic: Note on Jacobs chucks
Replies: 13
Views: 340

Re: Note on Jacobs chucks

Jacob chucks and there current quality comes up on Practical Machinist general forum fairly often. Going by what I've read posted there Jacob chucks are now supposed to be all built in China and that the new rebuild kits don't properly fit the older American made chucks. I don't recall a single post...
by pete
Tue Nov 07, 2017 10:58 pm
Forum: General Discussion
Topic: OT: Building in isolated location
Replies: 415
Views: 26663

Re: OT: Building in isolated location

Exactly Ed, and where do they draw the line? Isn't bacteria alive? Only animals are mentioned in there name so unethical treatment of plants and bacteria is open season? Logic from PETA members isn't very pretty either. Easy to have firm beliefs about how the rest of us should live our lives when yo...
by pete
Tue Nov 07, 2017 8:47 pm
Forum: General Discussion
Topic: OT: Building in isolated location
Replies: 415
Views: 26663

Re: OT: Building in isolated location

It would be pretty rare for a black bear to even try for a deer Bill. Way too quick for them unless it was old and/or sick. There mostly foragers and eat everything from fresh grass in the spring to grubs or anything dead. I have seen full grown grizzlys digging up fox dens and snacking on the new p...
by pete
Sun Nov 05, 2017 6:43 pm
Forum: Lathes
Topic: What Measurements Are Important
Replies: 2
Views: 375

Re: What Measurements Are Important

A great set of charts showing the proper tests Ron. Dr. Georg Schlesinger pretty much wrote the book on machine tool alignment and testing. There's a couple of websites with copies of his work online if you run a search using his name and possibly adding Testing Machine Tools they should come up as ...
by pete
Mon Oct 23, 2017 5:33 pm
Forum: Milling Machines
Topic: Milling Machine Identification
Replies: 6
Views: 346

Re: Milling Machine Identification

Given the OP's user name I'd assume your in Norway? I can't really give you any help about your machine or it's actual brand name except to offer a suggestion. It's layout is quite typical of an European built toolroom mill. No company sets up and builds something that complex without being a fair s...
by pete
Sat Oct 21, 2017 6:19 pm
Forum: General Discussion
Topic: Drilling to depth?
Replies: 33
Views: 1221

Re: Drilling to depth?

I've drilled a fair number of #56 (.046") tap drill holes for 0-80 threads with a floor standing drill press and my BP clone and there both about the same for actual feel while drilling. Pretty much none :-) And have also done some in stainless. Depends on what type of mill you have or if it's ...

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