Search found 293 matches

by D_R
Tue Jun 14, 2005 8:07 pm
Forum: Sheet Metal Fabrication
Topic: Bending Aluminum Pipe?
Replies: 11
Views: 38690

Re: Bending Aluminum Pipe?

"Go to a mufler shop. They will have a tube bender and will be gald to bend your tubing for a small fee. " Muffler shops have benders meant for relatively thin wall exhaust pipe. The dies they use are different than a conventional tube bending die. There's a chance if the size pipe is near a standar...
by D_R
Mon May 30, 2005 8:36 am
Forum: General Discussion
Topic: hard steel turning
Replies: 9
Views: 2171

Re: hard steel turning

"I am thinking my punches are maybe a 62 hardness and made of M2 or A2 but regular carbide is just messing them up." Most punches, like Roper-Whitney sheet metal type, are much softer than Rc 62. The punches used in CNC punching machines tend to be quite hard though. BTW, I've made punches out of ha...
by D_R
Sun May 29, 2005 8:27 am
Forum: General Discussion
Topic: hard steel turning
Replies: 9
Views: 2171

Re: hard steel turning

tnta, The process of turning hardened steel is referred to as "hard turning". It's done on rigid CNC lathes with special inserts. Not a process for the average home shop guy. Thor punch company tells me they make their punches from pre-heat treated blanks and "hard turn" the business end to size (ro...
by D_R
Tue May 03, 2005 10:42 am
Forum: General Discussion
Topic: Low Cost Metal Stamping Press
Replies: 2
Views: 1156

Re: Low Cost Metal Stamping Press

"I will need to get a die made also"

I think the die maker could give you some inidication of the tonnage required.
by D_R
Fri Apr 22, 2005 11:56 am
Forum: General Discussion
Topic: 2 mm square tool steel
Replies: 2
Views: 987

Re: 2 mm square tool steel

Try Parker Steel. They only deal in metric sizes.
by D_R
Mon Apr 04, 2005 9:13 am
Forum: General Discussion
Topic: ID on Cont Cast Iron Bar
Replies: 2
Views: 1034

Re: ID on Cont Cast Iron Bar

"if there is a standard color coding system for ID'ing alloys of continuous cast iron bar (such as Durabar) like there is for rolled steel alloys? " Wish that was true, but there is no standard color coding system for steel alloys. Every vendor and mill seems to use a different color coding system. ...
by D_R
Mon Mar 21, 2005 2:51 pm
Forum: Sheet Metal Fabrication
Topic: Bend angle on Di-Acro Brake?
Replies: 5
Views: 6174

Re: Bend angle on Di-Acro Brake?

I have customers with the latest and greatest in CNC press brakes. Supposedly, these will do an accurate bend angle the first time. They tell me at least one test piece is still needed so you aren't alone with this problem. One thing to watch out for in "sneaking" up on a bend. Once you reach the co...
by D_R
Mon Mar 07, 2005 12:16 pm
Forum: General Discussion
Topic: VFD Controller
Replies: 5
Views: 1233

Re: VFD Controller

FWIW, I've been told some of the newer VFD's can tolerate switching devices between them and the driven motor.
by D_R
Mon Mar 07, 2005 12:13 pm
Forum: General Discussion
Topic: Bison face cutters
Replies: 2
Views: 774

Re: Bison face cutters

Those type cutters may be okay for very light work. With the clamp holding mechanism for the insert these are not at all in the same league with the Kennametal and other types using screw down inserts. Taking an angled plunge with a clamped milling insert may cause the insert to move in it's pocket....
by D_R
Tue Feb 15, 2005 9:33 pm
Forum: General Discussion
Topic: Chrome cylinder rod
Replies: 12
Views: 2555

Re: Chrome cylinder rod

Hmmmm....you guys are talking about plated cylinder rod. Back in the sizties when I was in college I had a job at Cunningham MFG in Seattle. Their main product line was pneumatic and hydraulic cylinders. They advertised as being the first cylinder manufacturer to use hard chromed rods. I know the ro...
by D_R
Thu Feb 10, 2005 9:23 am
Forum: Sheet Metal Fabrication
Topic: Sheet Metal Cutters
Replies: 13
Views: 7744

Re: Sheet Metal Cutters

Uhh, Doug......

You already have a cheap knock-off wheel type shear that you say doesn't perform as expected.

Do you really want to buy a Beverly knock-off that also won't perform as expected?

As with all tools, you get what you pay for.
by D_R
Mon Feb 07, 2005 6:35 pm
Forum: General Discussion
Topic: reasonable prices for used tooling- question
Replies: 9
Views: 1705

Re: reasonable prices for used tooling- question

"In trying to determine a fair value for this stuff, he looked up all the list prices in the MSC book, and offered the lot to me for 25 cents on the dollar. " You haven't given us much info on this guy, but a number of times I've seen older guys shutting their shops for retirement who don't have a c...