Search found 1470 matches

by earlgo
Sun Jan 19, 2020 5:24 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 10
Views: 283

Re: grinding carbide inserts

Harold your Graziano has 10x the HP of my Atlas. So far I have not lost an insert. :)
Thanks.
--earlgo
by earlgo
Sun Jan 19, 2020 10:14 am
Forum: Lathes
Topic: grinding carbide inserts
Replies: 10
Views: 283

Re: grinding carbide inserts

Being impecunious and having an ATLAS lathe without a QC toolholder, I chose to make my own insert holders to fit my version of the toolholder. The pocket was roughed out, the insert oriented and fastened in place and the 'crack' filled with JBWeld. It has lasted very well and holds the insert secur...
by earlgo
Thu Jan 09, 2020 10:08 am
Forum: Milling Machines
Topic: German Optimil BF 46Vario
Replies: 4
Views: 1890

Re: German Optimil BF 46Vario

Turns out my friend found out it will run on US power. It has its own electronics, but no DROs.
My friend found a good Bridgeport with DROs installed so this issue is dead.
--earlgo
by earlgo
Fri Jan 03, 2020 9:42 am
Forum: General Discussion
Topic: Grinding wheel question
Replies: 12
Views: 857

Re: Grinding wheel question

My Delta Toolmaker is in a separate room, and the swarf blows against a wall. When a lot of grinding is to be done I hook up the shop vac to collect the swarf as it flies off the wheel.
Delta 24-105.jpg
Delta 24-105
--earlgo
by earlgo
Thu Jan 02, 2020 3:03 pm
Forum: General Discussion
Topic: Grinding wheel question
Replies: 12
Views: 857

Grinding wheel question

The question arose in a conversation with a fellow hobbyist as to what is the reason that a hard wheel is recommended for grinding soft materials and a soft wheel for hard materials. I looked this up in two references dating back to 1913 and the recommendation was the same but the reasoning was not ...
by earlgo
Mon Dec 30, 2019 9:29 am
Forum: The Junk Drawer
Topic: Merry Christmas
Replies: 18
Views: 1323

Re: Merry Christmas

Neanderman: Sorry to hear of your partner's affliction. We will keep your family in our thoughts and prayers.
--earlgo
by earlgo
Sat Dec 21, 2019 10:40 am
Forum: Gunsmithing
Topic: Floating Reamer Holder.
Replies: 2
Views: 397

Re: Floating Reamer Holder.

When I was at the Colorado School of Trades, we chambered a lot of barrels. That was nearly 50 years ago and I can't remember if we used a floating reamer holder or not. However, having said that, I do own a FRH so I must have gotten the idea somewhere. If you use a steady rest instead of a 4 jaw ch...
by earlgo
Wed Dec 18, 2019 4:59 pm
Forum: Lathes
Topic: 3 jaw chuck
Replies: 29
Views: 3006

Re: 3 jaw chuck

You are correct as usual, Harold. Unfortunately the 5" 3 jaw chuck that came with the Atlas lathe has 1 pc jaws and like the rest of us post 60 year old things, some parts become sloppy and loose. :shock: Had it not been so cold or I so lazy, I woulda/shoulda put on the 6" SHAR chuck and done the ri...
by earlgo
Wed Dec 18, 2019 3:32 pm
Forum: Lathes
Topic: 3 jaw chuck
Replies: 29
Views: 3006

Re: 3 jaw chuck

And speaking of worn out 3 jaw chucks... I used the 3 jaw from the 1958 Atlas to grip a chunk of stock on which I wanted to cut a M12x1.75 thread. Since I couldn't thread it normally, I bought a threading die from the hardware store. It, of course, cut the thread in 1 pass and the resultant torque s...
by earlgo
Mon Dec 16, 2019 11:03 am
Forum: Lathes
Topic: 10" Atlas Trouble Turning Unknown Steel
Replies: 11
Views: 1212

Re: 10" Atlas Trouble Turning Unknown Steel

The Atlas 12" lathe that my dad bought in 1958 was available with up to a 3/4HP motor. If the lathe is bogging down, it is either way underpowered by a replacement motor or, as mentioned, the belts are slipping or the tooling is wrong. My dad apparently was short of cash so he put on a 1/3 HP motor ...
by earlgo
Thu Dec 12, 2019 10:22 pm
Forum: General Discussion
Topic: Identifying an unusual thread: 26 tpi
Replies: 17
Views: 8759

Re: Identifying an unusual thread: 26 tpi

If it were a UN screw it would be a #19. Easily determined by measuring OD, subtracting .060 and then dividing the remainder by .013. So .307-.060 = .247 and .247/.013 = 19 Definitely not a hardware store size. The diameter of a UN screw is equal to (screw number x .013) +.06. So a #10 screw is 10*....
by earlgo
Tue Dec 10, 2019 12:26 pm
Forum: General Discussion
Topic: Delta Milwaukee "Toolmaker" v-belt pulley sizes?
Replies: 13
Views: 2035

Re: Delta Milwaukee "Toolmaker" v-belt pulley sizes?

I finally got the opportunity to watch the Suburban guy do the wheel balancing and trueing thing. He is working with a surface grinder and we have T&C grinders, so don't over think it. I primarily use Norton SG wheels, they are pricey but last quite a bit longer between dressing. Their number is 5SG...