Search found 1264 matches

by John Hasler
Sun Dec 08, 2019 11:11 pm
Forum: General Discussion
Topic: Power HACKSAW question
Replies: 2
Views: 73

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: 142

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: 665

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: 1048

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: 8986

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: 307

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: 253

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: 3311

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.
by John Hasler
Fri Oct 25, 2019 6:38 pm
Forum: General Discussion
Topic: Electrical wiring in the home shop.
Replies: 61
Views: 8349

Re: Electrical wiring in the home shop.

Mr Ron writes: Before the use of polarized plugs became standard on all electrical devices, the return leg of the device could be wired to the return leg of the power source. Reversing the plug in a receptacle, would make the entire device hot. I don't believe that it ever has been permissable to se...
by John Hasler
Fri Oct 25, 2019 5:46 pm
Forum: Lathes
Topic: Tail stock alignment
Replies: 11
Views: 1432

Re: Tail stock alignment

In standard notation the axis that the cross-sllide runs parallel to is X. Z is the axis of rotation of the spindle. Y is what you are calling Z. When turning a small movement of the tool up or down results in very little change in depth of cut so a tiny tilt to a part being turned between centers c...
by John Hasler
Tue Oct 22, 2019 10:50 am
Forum: General Discussion
Topic: Electrical wiring in the home shop.
Replies: 61
Views: 8349

Re: Electrical wiring in the home shop.

Under the current code GFCI is not required in a shop for 220 outlets, hardwired machines, or dedicated outlets. I know a number of people who have had bad experiences with the outlets with built in GFCI. One of them had the outlet catch fire. I have no GFCI and have no plans to install any but if I...
by John Hasler
Fri Oct 11, 2019 7:29 pm
Forum: Lathes
Topic: Screwcutting not picking up in the same place
Replies: 19
Views: 2940

Re: Screwcutting not picking up in the same place

If you are cutting threads with a pitch of 1.75 mm and your leadscrew has a pitch of 3 mm each turn of the leadscrew will cut 1.7143 threads. Thus your threading dial has to account for that ratio by moving one full interval for every .58333 turns of the leadscrew.