Search found 479 matches

by jcfx
Fri May 22, 2020 4:03 pm
Forum: General Discussion
Topic: Annealing E52100 steel ?
Replies: 5
Views: 299

Re: Annealing E52100 steel ?

I miss the old hardware stores, they used to be plentiful but they've gone the way of the Dodo, what's left are staffed with paycheck collectors and space fillers that give you the deer in the headlight looks when you ask for a 6-32 socket head cap screw. 220 balls left ! Trade anyone 10 balls for 1...
by jcfx
Thu May 21, 2020 12:42 am
Forum: General Discussion
Topic: Annealing E52100 steel ?
Replies: 5
Views: 299

Re: Annealing E52100 steel ?

Yep, without a heat treat oven I think those E52100 balls go in the parts archive bin.
Reordered some low carbon steel balls and they annealed and drilled great.

Anyone need some 5/16" dia. Low Carbon Steel balls ?
I have 242 left !
by jcfx
Thu May 21, 2020 12:37 am
Forum: General Discussion
Topic: Annular cutters
Replies: 16
Views: 728

Re: Annular cutters

That would probably not be much different than step drilling. If you actually needed a ring shape milled into something, like if a tube needs to go inside something and have the material both inside and outside the tube, an annular cutter would work. Steve I guess it would depend on the size holes ...
by jcfx
Wed May 20, 2020 12:57 pm
Forum: General Discussion
Topic: Annular cutters
Replies: 16
Views: 728

Re: Annular cutters

Are you drilling a blind hole into thick material? I was looking at thru holes. Can't envision a use of using one for a blind hole, but I'm sure there's something. Steve Interesting thought on using them for a blind hole, I'd guess if you had annular cutters that would overlap enough, it would be p...
by jcfx
Tue May 19, 2020 4:39 pm
Forum: General Discussion
Topic: Annealing E52100 steel ?
Replies: 5
Views: 299

Annealing E52100 steel ?

I've been attempting a rebuild of one of those ball and socket jointed soldering helping hands contraptions, the ball ends aren't what you would call a ball more door knob shaped and what I'm doing is annealing ball bearings so that I can drill and silver solder new rods into the balls to get true b...
by jcfx
Tue May 19, 2020 4:25 pm
Forum: General Discussion
Topic: Annular cutters
Replies: 16
Views: 728

Re: Annular cutters

I've used them on my lathe to do exactly what you're intending to do, I used the annular cutter to cut holes in cast iron lathe chuck back plates, I needed to finish bore a register in them to a certain size. I bought a MT2 annular cutter holder from Mcmaster, which fits my drill press and lathe tai...
by jcfx
Fri May 15, 2020 4:09 pm
Forum: The Junk Drawer
Topic: Does anyone else get this message
Replies: 11
Views: 566

Re: Does anyone else get this message

Interesting, never really paid much attention but now that you bring it up, using your link takes me here
very bare bones, not secure -
chaski01.jpg
chaski01.jpg (19.71 KiB) Viewed 500 times

Clicking on the link does take me to a secure page ( green lock and https ) -
chaski02.jpg
chaski02.jpg (26.29 KiB) Viewed 500 times

I'm using Firefox on a Mac.
by jcfx
Wed May 06, 2020 1:58 am
Forum: General Discussion
Topic: Determining an angle of a blind pocket ?
Replies: 13
Views: 1186

Re: Determining an angle of a blind pocket ?

The angle is sort of critical, since there are two opposing cylinders with the same pocket my replacement one needs to be as close as possible to the one I'm not replacing in order for the ball joints at the ends of the arm to lock. I ordered a countersink that was 100º and it sort of worked, the po...
by jcfx
Mon May 04, 2020 7:34 pm
Forum: General Discussion
Topic: Determining an angle of a blind pocket ?
Replies: 13
Views: 1186

Re: Determining an angle of a blind pocket ?

Bill - You're not missing anything, I was just looking for alternate ways of measuring that angle rather than my way of turning a point using the compounds protractor and seeing if it matched. or test fitting counter sink bits I had ( were all too acute ). You're correct that the tapered pocket is o...
by jcfx
Sun May 03, 2020 8:49 pm
Forum: General Discussion
Topic: Determining an angle of a blind pocket ?
Replies: 13
Views: 1186

Re: Determining an angle of a blind pocket ?

Interesting ideas, in the realm of wax I did try a hard styling clay which needs to be heated to work with but the part was too much of a heat sink to use the clay. whateg0 - I was wondering about using a DTi but I would have make a needle point probe, the pocket is only a little over 1/8" deep, whe...
by jcfx
Sun May 03, 2020 12:02 am
Forum: General Discussion
Topic: Determining an angle of a blind pocket ?
Replies: 13
Views: 1186

Determining an angle of a blind pocket ?

I was wondering how to determine what an angle would be for a blind pocket ? Through trial cuts on a lathe I arrived at an angle that fits the pocket, but I was wondering if there was a better way. A little info, what I'm doing is converting a Manfrotto 143 Magic Arm from a cam lock to a screw lock,...
by jcfx
Mon Apr 27, 2020 11:56 am
Forum: Milling Machines
Topic: Mill tooling
Replies: 48
Views: 5962

Re: Mill tooling

I've used precision ground tool room stones to knock down high spots, they seem to work very well on flat surfaces
they'll probably work when used with some care on tapered round surfaces.