Search found 1268 matches

by John Hasler
Thu Dec 12, 2019 12:13 am
Forum: Lathes
Topic: 3 jaw chuck
Replies: 20
Views: 1063

Re: 3 jaw chuck

When I'm using a three-jaw I just don't take the part out of the chuck until I'm done. I sometimes take the chuck off with the part still in it, do something else, and the put the chuck back on, though.
by John Hasler
Wed Dec 11, 2019 11:29 am
Forum: General Discussion
Topic: Fire Danger
Replies: 10
Views: 203

Re: Fire Danger

Only "drying" (i.e., polymerizing) oils such as linseed and tung oil spontaneously combust. You have to pile the rags up to get them to do it.

Telling them this won't help, though. They will quote an "expert" as asserting that all oily rags are dangerous.
by John Hasler
Mon Dec 09, 2019 11:08 pm
Forum: Lathes
Topic: 3 jaw chuck
Replies: 20
Views: 1063

Re: 3 jaw chuck

Runout in a three-jaw is a much less serious problem than is bellmouthing. When I need something accurately centered I use a four-jaw.
by John Hasler
Mon Dec 09, 2019 5:38 pm
Forum: General Discussion
Topic: Power HACKSAW question
Replies: 9
Views: 250

Re: Power HACKSAW question

A power hacksaw can have a thick, wide, HSS blade. If the machine is properly made and correctly adjusted this allows it to make very straight cuts.
by John Hasler
Sun Dec 08, 2019 11:11 pm
Forum: General Discussion
Topic: Power HACKSAW question
Replies: 9
Views: 250

Re: Power HACKSAW question

Yes.
by John Hasler
Sun Dec 08, 2019 12:33 pm
Forum: General Discussion
Topic: Anodizing Power Supply?
Replies: 4
Views: 174

Re: Anodizing Power Supply?

I haven't tried anodizing yet but from what I've read you can't simply trade off time for current because the finish depends on the current density. That one looks suitable to me. I recently scored a couple of big honk'in programmable supplies (one 0-20 V 0-20 A, the other 0-60 V 0-60 A) so I may gi...
by John Hasler
Fri Dec 06, 2019 12:42 pm
Forum: Live Steam
Topic: Kit Iron Castings
Replies: 16
Views: 770

Re: Kit Iron Castings

Are the cast iron parts that come from Allen, Little Engines, Mercer, Etc made from grey iron or ductile iron? I have read in several places when recommendations are made to make things from ductile iron but ideal -vs- economical or expedient or even availability are different things so I would lik...
by John Hasler
Fri Dec 06, 2019 8:56 am
Forum: General Discussion
Topic: Interrupted Cut Removes Tool Point
Replies: 27
Views: 1187

Re: Interrupted Cut Removes Tool Point

I have a set of "coated" drill bits purchased at a yard sale that are like that. My guess is that they are high carbon steel that never got heat-treated due to a manufacturing screwup.

Fortunately the index they were in was worth the $2.
by John Hasler
Thu Dec 05, 2019 10:31 pm
Forum: I.C. Engines
Topic: spark plug manufacture
Replies: 11
Views: 9023

Re: spark plug manufacture

If you simply cast ceramic around your electrode differential thermal expansion will almost certainly cause a failure unless you match the coefficients of expansion. There is also a risk of a smooth electrode being blown out when the cylinder fires (the insulator can also blow out of the shell: I ac...
by John Hasler
Tue Dec 03, 2019 7:02 pm
Forum: Home Shop CNC
Topic: New Controller?
Replies: 9
Views: 347

Re: New Controller?

It was the Centroid Acorn system that I was looking for. Reading more, I see it requires Windows 10. Somehow I thought it was a fully contained controller and would just need a monitor and HID. I also see it wont support my pendant - which I never got set up anyway. I guess I'll have to read about ...
by John Hasler
Fri Nov 29, 2019 11:18 pm
Forum: Lathes
Topic: Vee belts for lathe
Replies: 3
Views: 286

Re: Vee belts for lathe

The link belts do have a direction, and they don't give a "this is what will happen if you run it in reverse" comment, so I don't know what the effect would be. I have run my atlas in reverse with a link belt, but since I have a threaded chuck, it was only very slow to remove a tap or die from a pa...
by John Hasler
Mon Oct 28, 2019 9:54 am
Forum: General Discussion
Topic: VFD setup
Replies: 28
Views: 3353

Re: VFD setup

I read 280 but it looks to me like it's been restamped and then scraped. I think I see the remnants of a "1" to the left of the "2".

Star connected 480 is 277 phase to neutral. That makes no sense to me on a motor nameplate, though.