Search found 6531 matches

by GlennW
Thu May 31, 2018 12:29 pm
Forum: The Photo Album
Topic: Soft Jaws
Replies: 15
Views: 1282

Re: Soft Jaws

Nice solution Earl! I'm working with short sections of dead soft 1/2" dia. thin wall tubing, so I needed as much contact as I could get. DSC01006.jpg A collet could have worked for this step of the job, but I need depth location so I would have had to machine a collet blank to suit. (Which can also ...
by GlennW
Wed May 30, 2018 6:59 am
Forum: General Discussion
Topic: Indicating knurled surfaces
Replies: 14
Views: 978

Re: Indicating knurled surfaces

If you want the shaft to be concentric with the high points on the knurling use a scroll chuck and soft jaws to hold the roller.

Four jaw chucks serve a purpose, but are far from "all purpose".
by GlennW
Sat May 26, 2018 9:09 pm
Forum: General Discussion
Topic: Another "How to make" question
Replies: 31
Views: 1999

Re: Another "How to make" question

Once you have made it that far, the next step is to move Y back to 1.549" and connect the slots using the rotary table. (Pink line again) Ron 3.JPG Of course, there are short cuts, but this is one basic explicit way to demonstrate the concept of rotary table use. Naturally, roughing and finishing cu...
by GlennW
Sat May 26, 2018 8:50 pm
Forum: The Photo Album
Topic: Soft Jaws
Replies: 15
Views: 1282

Re: Soft Jaws

SteveM wrote:
Sat May 26, 2018 7:53 pm
If your hand or arm ever hit that sharp 90 degree corner, it's going to be bad.
Been there, done that...

It's a little rough on the old knuckles!
by GlennW
Sat May 26, 2018 8:34 pm
Forum: General Discussion
Topic: Another "How to make" question
Replies: 31
Views: 1999

Re: Another "How to make" question

Ron, The angles are not as you are saying. The spokes are on 24 degree centers. Ron 1.JPG The pink lines are the center of the tool path of a 1/8" diameter end mill. Using a 1/8" end mill you would start with the RT at zero with the spindle zero'ed over the axis of the RT. Move the X axis of the mil...
by GlennW
Sat May 26, 2018 5:44 pm
Forum: General Discussion
Topic: Another "How to make" question
Replies: 31
Views: 1999

Re: Another "How to make" question

It's the same as what Ron had originally. The difference is that Ron had just figured the tool path incorrectly, which is most likely why he stated the other time he tried something similar it didn't work out. Ron, You are trying to calculate the tool path from the center of the wheel to the edge of...
by GlennW
Sat May 26, 2018 4:09 pm
Forum: The Photo Album
Topic: Soft Jaws
Replies: 15
Views: 1282

Re: Soft Jaws

They fit!
DSC00998.jpg
by GlennW
Sat May 26, 2018 3:36 pm
Forum: The Photo Album
Topic: Soft Jaws
Replies: 15
Views: 1282

Soft Jaws

I hadn't run my CNC mill since some time last year so I thought I'd see if it still remembered how to make stuff. Cut off the pieces on a Cold Saw, which leaves a nice finish. DSC00973.JPG Next to the Bridgeport for drilling, counter boring, and beveling the one end. DSC00975.jpg Next to the CNC Mil...
by GlennW
Fri May 25, 2018 8:42 am
Forum: General Discussion
Topic: 4130 chromoly
Replies: 5
Views: 675

Re: 4130 chromoly

You might consider grinding a radius on the corners of that 1" drill.

I'd drill it to about 7/8" and then bore the rest with at least a 1/32" radiused tool bit.

Better concentricity, better finish.
by GlennW
Thu May 24, 2018 7:23 pm
Forum: General Discussion
Topic: 4130 chromoly
Replies: 5
Views: 675

Re: 4130 chromoly

You will get different results depending on the temper of the stock, Annealed, Normalized, or Quenched and Tempered. I prefer working with harder stock, but I don't turn anything dry, I use flood cutting oil, so, what I do doesn't apply to most. Machining though seems to work well dry with carbide e...
by GlennW
Sun May 20, 2018 8:29 pm
Forum: General Discussion
Topic: Grinding wheel hole enlargement ?
Replies: 11
Views: 793

Re: Grinding wheel hole enlargement ?

Mine is a 1/4" diameter pin about 2 1/2" long and has about an inch of it's length coated with diamond grit. If my memory is working, the wheels I used were purchased as blanks and were 2" diameter and 2" long with a 1/2" bore. Probably from Diamond Industrial Tool as they have an incredible stock o...
by GlennW
Sun May 20, 2018 3:46 pm
Forum: General Discussion
Topic: Grinding wheel hole enlargement ?
Replies: 11
Views: 793

Re: Grinding wheel hole enlargement ?

They blew up from having the ID enlarged?

So dressing the OD with a diamond will cause the wheel to explode as well?