Bridgeport for Beginners!

Carbide threading inserts are pretty good to have around, it's possible to get some tool holders with carbide anvils that go under the insert to angle the insert the right way to get clearance if you're cutting a low T.P.I. thread or a left hand thread rather than run of the mill threads. I've been using anything from small TCMT 110204 carbide inserts (metric threads are 60 degree angle) through to tool steel for ACME threads. The triangle file lets me quickly touch up the crest, I nearly ruined threads without it as your male thread crest can be still binding on the matching radius of the nut's thread with everything else machined to fit.

 

Got the MT3-JT2 adapter for my little 11n Jacobs chuck. Wouldn't it figure the thing bottoms out in the chuck before it hits the sides! Don't ya hate it when that happens?
I looked around for a short JT2 version and didn't see anything. Any harm in slapping this thing in the lathe and shaving 1/4" off the end of the Jt2 ????

 

Sounds like it's wrong somehow, are you sure it's a JT2 and not some factory mis-labelled adapter?.

 

I have to agree with Mark, something isn't right there. Do the angles match?

 

The angles need to match dead on if there is going to be a lock. They also need to be cylindrical ground. There are more than one taper. You have the Jacobs taper, do you have the mores taper, then you have the brown and sharp and the jarno.

And then there are a couple custom tapers. If you use high spot blue or even just a black magic marker when you twist to fit, this will give you a good surface interference fit.

 

Looks like it should be the right one to me. I think its just too long. I see others online trying to find a short version of the 2jt.

 

Well I'll be a monkey's ass!
This actually works pretty good! I think I'll hang onto my old router bits a little longer. lol.

 

Count me in on that too. good idea.

 

Made a double header. I have GOT to get a 4 jaw. I'm sick of banging shit around.

I wanted to make this a one piece holder with a dovetail until I found out Randy in the shops dovetail cutter was almost 200bucks! The one I bought from Shars is somewhere on the road. This thing fits nicely in a tool holder. good enuf!

 

I cut .060 and .080 aluminum for sign blanks and machine tags, etc on my CNC trim router with carbide router bits pretty often. Perfect radius corners would be virtually impossible (or at least unprofitable) otherwise. As far as real machining goes, if it works in a pinch, go for it!

Pete

 

Before I hit the public button... Someone please tell me if I'm off base here. Thanks!

 

Not really wanting to play position the collet game to minimize shitty quality.

I'm probably asking for too much from 60bucks, but I'm willing to pay more for a little better quality.

 

I concur, I would also put an endmill in a ER32 collet measure and note differences. That would be the verdict for me.

 

Point taken Kelly. I do have a decent selection of R8 collets already. I was thinking by having a decent ER32 R8, it would make swapping stuff faster and easier in the mill. Less standing on my toes.

 

easyZERO-one-sheet-2014-v1.8.pdf (monaghantooling.com)