Search found 161 matches

by ChipMaker4130
Sat Feb 29, 2020 10:36 pm
Forum: General Discussion
Topic: Dead soft Aluminum
Replies: 14
Views: 4960

Re: Dead soft Aluminum

pete wrote:
Sat Feb 29, 2020 5:49 pm
. . .Copper will be a bit hard but it's easy to return it to a soft condition just by heating to red hot then air cooling. . .
Better to water quench. It 'cleans' the surface and gets the copper to the absolute softest possible state.
by ChipMaker4130
Wed Feb 19, 2020 9:27 pm
Forum: General Discussion
Topic: hardening and tempering
Replies: 20
Views: 5576

Re: hardening and tempering

. . .2 rods I made for my press didn't bend at full force. . . You don't say what function your hardened parts will perform, but if edge-loaded or if used where a bending force may be applied you definitely don't want super hard. When they break, its like an explosion - shrapnel and all! There are ...
by ChipMaker4130
Sun Feb 02, 2020 7:59 pm
Forum: General Discussion
Topic: Pull start repair.
Replies: 40
Views: 15646

Re: Pull start repair.

A note on the Harris Sta-Silv Black: it is a bear to remove after soldering. When I can, I sand-blast it off!
by ChipMaker4130
Thu Jan 30, 2020 11:00 am
Forum: General Discussion
Topic: When to ream!
Replies: 11
Views: 2875

Re: When to ream!

I would face before reaming. You don't show dimensions, but reaming would typically only take off the last 5-20 thousandths or thereabouts, depending on bore size. There shouldn't be any chatter problems with the reaming operation. (The main reason to face before reaming is to provide smooth entry f...
by ChipMaker4130
Thu Dec 05, 2019 9:29 pm
Forum: General Discussion
Topic: Piston or Wedge QCTP.
Replies: 19
Views: 6219

Re: Piston or Wedge QCTP.

At home I use a Phase-II wedge. At work we use a piston. If all the holders fit properly and if it is all of good quality you will be happy with the piston. If I were to buy again, it would be another wedge. I like the way it pulls down & tight.
by ChipMaker4130
Tue Nov 26, 2019 8:07 pm
Forum: General Discussion
Topic: Interrupted Cut Removes Tool Point
Replies: 27
Views: 7377

Re: Interrupted Cut Removes Tool Point

That material shouldn't affect (for a long time, anyway) a typical 'point' of HSS, interrupted cut or not. Is the cutter for sure being damaged, or is it just a buildup of Aluminum at the point? How much 'stickout' do you have from the holder to the cutting edge, and what is the shape of the cutting...
by ChipMaker4130
Mon Oct 14, 2019 12:35 pm
Forum: General Discussion
Topic: Plasma cutter options
Replies: 10
Views: 3692

Re: Plasma cutter options

I have a Hypertherm PowerMax 600, an older unit. It is a 40A machine, has very good consumable life and cuts 1/2" steel very nicely. I've cut long runs of 1/2" steel and never had the machine stop due to 'duty cycle'. I get tired before the Hypertherm does! The larger versions of this make might sui...
by ChipMaker4130
Sun Oct 06, 2019 9:34 am
Forum: General Discussion
Topic: suspended recumbent trike finished
Replies: 6
Views: 3714

Re: suspended recumbent trike finished

spro wrote:
Thu Oct 03, 2019 8:27 pm
I already liked the one you made.
I already like the one you're going to make!
by ChipMaker4130
Mon Sep 30, 2019 5:20 pm
Forum: General Discussion
Topic: suspended recumbent trike finished
Replies: 6
Views: 3714

Re: suspended recumbent trike finished

Turned out great. Nice work!
by ChipMaker4130
Sun Sep 29, 2019 11:06 am
Forum: General Discussion
Topic: Phase converter theory question.
Replies: 3
Views: 2199

Re: Phase converter theory question.

My uneducated guess is that swapping the input will not have any effect. The idler will still rotate in the same direction and the phase relationship between the single-phase input and the idler will remain the same.
by ChipMaker4130
Fri Sep 13, 2019 2:32 pm
Forum: General Discussion
Topic: Used endmills
Replies: 13
Views: 5417

Re: Used endmills

I think Mr Hoffman alluded to the key question: Do you need to sharpen the flutes or just the end? 'Touching up' the end isn't usually too big a job and in many cases, especially in a home shop, that's the part that gets dull.
by ChipMaker4130
Wed May 29, 2019 8:08 pm
Forum: General Discussion
Topic: Drilling UHMW
Replies: 6
Views: 4471

Re: Drilling UHMW

If accuracy is not an issue, you'll still be ahead time and fuss-wise just using a hole saw. Use the coarsest tooth one you can get and don't turn it fast and it won't be a problem. You can also flood it with coolant or even water. You will have to deal with a burr unless you cut part way through, t...