Search found 12 matches

by TGriffin
Sun Oct 20, 2013 9:44 pm
Forum: General Discussion
Topic: Newbie is an understatement
Replies: 9
Views: 1179

Re: Newbie is an understatement

You got a steal and a couple of very nice machines to learn on. I spent a lot of hours on that model of Clausing and it is a nice lathe to use. The Bridgeport is also one of the most versatile mills around and there is a ton of tooling available for it. Hopefully you got tooling with the machines be...
by TGriffin
Sun Oct 13, 2013 10:44 am
Forum: General Discussion
Topic: found old test indicator
Replies: 8
Views: 2123

Re: found old test indicator

I have the Lufkin version and it works great. That type is a lot more durable than the ones with a gear train.

Tom
by TGriffin
Sat Sep 28, 2013 9:52 pm
Forum: 3-in-1 Metalworking Machines
Topic: making a pulley on a lathe
Replies: 30
Views: 12122

Re: making a pulley on a lathe

The 6" diameter is going to be pretty large to turn on a mandrel. You would need to take really light cuts to keep it from spinning. A better bet would be to mount the blank to a faceplate or hold it in the chuck to do the work. Make sure you turn the diameter and the bore in one set-up to maintain ...
by TGriffin
Wed Sep 25, 2013 7:28 pm
Forum: The Junk Drawer
Topic: Shop wall art
Replies: 26
Views: 4054

Re: Shop wall art

This is a good thread, I'm surprised there aren't more responses. My walls are pretty much covered with stuff. The Cleveland decimal equivalent chart is over my lathe and is probably the only thing that I actually use, the Wright brothers mural is my inspiration, the Cleveland Air Race memorabilia i...
by TGriffin
Tue Sep 24, 2013 10:11 pm
Forum: Gunsmithing
Topic: cannon
Replies: 31
Views: 16383

Re: cannon

The whole point of temper is pretty much academic if there is adequate wall thickness on the barrel. The original barrels were cast and certainly not heat treated, but they had a heck of a lot of mass. Metallurgy was a pretty young science back then so they probably just over engineered the heck out...
by TGriffin
Mon Sep 23, 2013 4:46 pm
Forum: Gunsmithing
Topic: cannon
Replies: 31
Views: 16383

Re: cannon

The downside of a fabricated brass barrel is attaching the trunnions. You don't want to heat it excessively or you will anneal the brass to its softest state which is not desirable. While I would have no concern silver soldering trunnions to a steel barrel, I would not do so with a brass one. Georg...
by TGriffin
Mon Sep 23, 2013 7:46 am
Forum: Gunsmithing
Topic: cannon
Replies: 31
Views: 16383

Re: cannon

That's on about 1/2 ounce of powder (1/3 of a Dixie cup) and that's the point where where the muzzle blast just starts to crack. I've always wondered about the velocity of the ball, I imagine it's somewhere around 1000 fps. The recoil isn't as bad as it looks in the video. It generally rolls back ab...
by TGriffin
Sun Sep 22, 2013 11:55 pm
Forum: Gunsmithing
Topic: cannon
Replies: 31
Views: 16383

Re: cannon

Tom, A 1.2" diameter brass barrel will be more than adequate for a .36 caliber bore. My cannon is a 1/5 scale Napoleon has a .94" bore, is 2.25" diameter at the breech and I've been shooting it regularly for the last thirty years. How are you planning to do the trunnions? I spot faced each side of t...
by TGriffin
Sun Sep 22, 2013 11:35 pm
Forum: General Discussion
Topic: HSS Grinding Question
Replies: 7
Views: 1003

Re: HSS Grinding Question

I use a lot of HSS tooling so I get quite a bit of practice hand grinding and grinding a small radius is one of the toughest skills to master. It takes a very light touch and the use a fine wheel (100 grit) so you have more time to form the radius. Start by resting one edge of the tool against the w...
by TGriffin
Tue Jan 17, 2012 8:02 pm
Forum: Lathes
Topic: Show us your lathe!
Replies: 422
Views: 120331

Re: Show us your lathe!

An OUTSTANDING collection of lathes! Mine is a Hardinge HLV-H that I acquired in 1984. With the exception of a few cosmetic issues from spending a year in storage, it is in pretty much as new condition. It has a taper attachment, an Aloris tool post, a dial indicator carriage stop, a full set of 5C ...
by TGriffin
Tue Jan 17, 2012 12:00 pm
Forum: Milling Machines
Topic: deepish slotting
Replies: 6
Views: 1496

Re: deepish slotting

Sam, A slitting saw would be the best option, but if the price is prohibitive, a screw slotting saw would be your next best bet. Get the smallest diameter cutter you can get away with (don't forget to allow for whatever arbor you use), use plenty of cutting oil, a slow feed rate and keep the chips c...
by TGriffin
Fri Dec 10, 2010 10:20 am
Forum: Gunsmithing
Topic: making an end mill
Replies: 4
Views: 2773

Re: making an end mill

If you are just trying to remove the primers, you can make a punch to fit in the neck of the cartridge with an offset pin to drive the primer out. If you are intending to replace the berdan primer with a boxer primer, the hole will need to be reduced in size, re-sized and drilled. The following is a...