Search found 124 matches

by Jay, Idaho
Fri Apr 16, 2010 4:52 pm
Forum: General Discussion
Topic: Workholding Device for Horizontal Band Saw
Replies: 12
Views: 4450

Re: Workholding Device for Horizontal Band Saw

Sometimes the easiest method is to weld your part to a bar and put the bar in the vise. I have about 8 toolmaker vises in several sizes and these are quite handy for holding small parts. Maybe drill a hole in the part and use a screw to hold it to a bar for sawing. The hole would have to be where it...
by Jay, Idaho
Mon Apr 05, 2010 11:31 am
Forum: General Discussion
Topic: Knife Jimping....
Replies: 3
Views: 6207

How about a reinforced resin bonded cutoff wheel, 1/32 - .050 being spun in a lathe chuck? Clamp the blade in an Aloris type adapter, use the carriage for notch spacing and the crossfeed for depth of cut?
Just a different idea....

Jay, Idaho
by Jay, Idaho
Sun Jan 24, 2010 11:45 am
Forum: Milling Machines
Topic: stone to smooth mill table
Replies: 52
Views: 11774

I keep a swivel base under my Kurt on the B'port all of the time, just handy for the kind of jobs that I most often do on the mill. There are aluminum sheetmetal formed covers that cover the rest of the table, fitted very well up against the sides of the swivel base. They are reversed when I have on...
by Jay, Idaho
Fri Jan 08, 2010 10:11 am
Forum: General Discussion
Topic: Which metal for trepanning / fly cutter bit?
Replies: 23
Views: 4719

I've had very good luck with (quality) hole saws in the 2"-3 1/4" range through 1/2" steel plate. I use my BP mill but am probably below 100 rpm. I use lots of cutting oil and clear chips often. It does take a lot of pressure to keep it cutting.
Only try this with bi-metal hole saws.

Jay
by Jay, Idaho
Thu Jan 07, 2010 4:33 pm
Forum: General Discussion
Topic: Jacobs 33JT
Replies: 4
Views: 1152

It only takes a few minutes to make up a bunch of blank wedges from CRS and cut the slots to fit the taper when you need a set. I did this years ago and have used them quite a few times.

I'm cheap and hate to wait for stuff that I order.
by Jay, Idaho
Thu Jan 07, 2010 10:06 am
Forum: General Discussion
Topic: Which metal for trepanning / fly cutter bit?
Replies: 23
Views: 4719

Going through material that thick with a 1/4" diameter piece of HS is going to be quite challenging, probably impossible. 100 rpm may be too fast, depending on the diameter of the hole. I'd try high speed tool steel and see how it goes. Drilling followed by boring will probably a lot easier and quic...
by Jay, Idaho
Tue Dec 29, 2009 9:42 am
Forum: General Discussion
Topic: Hardening a Silver-brazed Steel Assembly
Replies: 24
Views: 2510

Silver braze during draw operation,

Use 4140 and do what Bill Cook suggested. That is how Remington does their rifle bolts that are made from several pieces.
by Jay, Idaho
Sat Dec 19, 2009 10:33 am
Forum: General Discussion
Topic: Heat treating 4140
Replies: 4
Views: 1702

Kitchen ovens often have temp swings as the heat is turned on and off. I'd put a piece of metal, or several, in the oven to act as a heat sink, reducing the temperature swings when it was cycling.
by Jay, Idaho
Thu Dec 17, 2009 10:24 am
Forum: General Discussion
Topic: forming with a punch and die
Replies: 11
Views: 1637

Licenses,

The most important think about owning/building suppressors in the US is to have the proper Federal paperwork. Each of the 50 states have their own rules which one will be aware of when you begin your Federal (BATFE) license application. My state, Idaho, allows full autos and suppressors while next d...
by Jay, Idaho
Wed Dec 16, 2009 10:58 am
Forum: General Discussion
Topic: forming with a punch and die
Replies: 11
Views: 1637

Nice stampings. How about showing us the tooling?

Thanks,

Jay
by Jay, Idaho
Sun Nov 29, 2009 9:52 pm
Forum: General Discussion
Topic: magnetic chuck
Replies: 6
Views: 1951

I had one that leaked oil so I took the bottom off and made a gasket or used latex or whatever to end the leak. What I saw was that when the lever was in the "OFF" position, it merely moved steel bar(s) into place that cancelled the magnetic function of the magnets. So simple that I was really impre...
by Jay, Idaho
Fri Oct 09, 2009 8:43 am
Forum: General Discussion
Topic: Drilling to Get Rid of Excess Metal?
Replies: 20
Views: 2950

Your original idea of drilling holes is probably not a bad idea. I have "chain-drilled" a plate to make a rough disc when we did not have a saw that was suitable. You drill a series of holes outside of the finish part diameter, holes almost touch each other but not quite. You can then easily saw thr...