Search found 411 matches

by Conrad_R_Hoffman
Mon Sep 14, 2020 1:54 pm
Forum: General Discussion
Topic: Boyar Shultz table stop
Replies: 16
Views: 2959

Re: Boyar Shultz table lock

I've never understood the lack of a table lock. At the very least you need it for dressing the wheel so the diamond doesn't creep. I think it's possible to move the stops in so they both contact the push thingie, but that's a pita. Better to make a dedicated part, but I've never really looked at wha...
by Conrad_R_Hoffman
Fri Aug 21, 2020 11:57 am
Forum: General Discussion
Topic: Cutting oil holder
Replies: 11
Views: 2994

Re: Cutting oil holder

Empty tuna cans are the rule, because machinists eat tuna fish sandwiches for lunch.
by Conrad_R_Hoffman
Tue May 19, 2020 2:37 pm
Forum: General Discussion
Topic: Starrett combination squares
Replies: 9
Views: 2461

Re: Starrett combination squares

I bought one long ago because it was something you were supposed to have. Over 30 years or so it probably takes the award for the least used tool in the shop. Based on that, material wouldn't matter much.
by Conrad_R_Hoffman
Tue Jan 14, 2020 2:13 pm
Forum: General Discussion
Topic: Grinding wheel question
Replies: 12
Views: 3495

Re: Grinding wheel question

Don't grind dry. That way the mess will be localized. Dressing the wheel goes everywhere but drops quickly and I just sweep if off the cement floor.
by Conrad_R_Hoffman
Fri Dec 20, 2019 3:36 pm
Forum: Lathes
Topic: Proper way lubricants
Replies: 2
Views: 2366

Re: Proper way lubricants

I've used some pretty old way oil, but after a while I found it leaves a varnish. That's probably the time to dump it and buy new. There are lots of people bottling up the right lubes for SBs.
by Conrad_R_Hoffman
Mon Oct 21, 2019 3:03 pm
Forum: Lathes
Topic: Winding springs
Replies: 16
Views: 8207

Re: Winding springs

I don't like winding springs on the lathe; seems dangerous. I use a fixture with a drill chuck and a hand crank.
by Conrad_R_Hoffman
Fri Sep 13, 2019 1:20 pm
Forum: General Discussion
Topic: Used endmills
Replies: 13
Views: 5183

Re: Used endmills

I bought a fixture to sharpen the ends on my surface grinder. The fixture works well enough, but you have to shorten the end mills a bit if you can't grind the flutes. Given the cost of a decent 1/2" end mill, I think it's worth it, but not every end mill can be saved. OTOH, "real" machinists will c...
by Conrad_R_Hoffman
Wed Jun 05, 2019 12:43 pm
Forum: General Discussion
Topic: marking tools
Replies: 15
Views: 5685

Re: marking tools

You can buy colorants for epoxy. Pick a good one and mark tools with that. You can get really creative and mill a small spot and fill it with color. Fairly hard to remove, at least harder than most paints.
by Conrad_R_Hoffman
Fri May 31, 2019 11:30 am
Forum: General Discussion
Topic: Which grease to replace old specification?
Replies: 10
Views: 5460

Re: Which grease to replace old specification?

Well known to people with old British sports cars having manual transmissions. They called out GL-4 lube back then. The problem is some gear oils started saying "suitable for GL-4 & GL-5 applications", but I was never sure if they were safe to use. Then there was a spec for limited slip rear ends, t...
by Conrad_R_Hoffman
Tue May 28, 2019 3:43 pm
Forum: General Discussion
Topic: Which grease to replace old specification?
Replies: 10
Views: 5460

Re: Which grease to replace old specification?

Obviously lubricants have to be chosen for the application, but in this case it would be hard to find a grease that wasn't up to the job. I seem to remember being surprised that one of my Kluber high speed spindle greases also mentioned open gears as an application. Seemed like an expensive way to g...
by Conrad_R_Hoffman
Tue May 28, 2019 12:00 pm
Forum: General Discussion
Topic: Drilling UHMW
Replies: 6
Views: 4317

Re: Drilling UHMW

I use that technique for all sorts of thin and hard to grip parts. Works great.
by Conrad_R_Hoffman
Mon May 20, 2019 10:09 pm
Forum: Milling Machines
Topic: Gear Cutting
Replies: 9
Views: 6171

Re: Gear Cutting

FWIW, I make most of my gears out of Delrin. They hold up great, can be cut faster and the gear cutters stay sharp longer. I'm sure there are places where you really need steel, but maybe fewer than people think.