Search found 178 matches

by johnfreese
Tue Jan 14, 2020 5:52 pm
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 893

Re: Keeping drilled holes aligned

I would mount my drill in my ER16 straight shank holder. I would hold the drill as short as possible and still have enough stickout to get through the metal. A split point or 4 facet grind will not tend to walk off location. Using a carbide drill with this kind of setup would be like wearing a belt ...
by johnfreese
Thu Jan 09, 2020 9:01 pm
Forum: Lathes
Topic: "Put it in 'R' for Race"
Replies: 12
Views: 1058

Re: "Put it in 'R' for Race"

My current lathe is a Nardini. Both the headstock and the apron have cam-driven piston pumps. I get reliable oiling regardless of direction of rotation.
by johnfreese
Sun Jan 05, 2020 7:06 pm
Forum: Live Steam
Topic: Free 2D CAD Software?
Replies: 20
Views: 1397

Re: Free 2D CAD Software?

Solid Edge ST8
by johnfreese
Sat Jan 04, 2020 9:30 pm
Forum: General Discussion
Topic: Floating reamer holders
Replies: 21
Views: 1324

Re: Floating reamer holders

Floating reamer holders sometimes show up on eBay. Look for Glenzer or Scully Jones brand. They are built to allow only radial float. If your tailstock does not feed perfectly parallel with the spindle you will get a bell mouth hole with or without a floating holder. As lathes wear the front of the ...
by johnfreese
Sun Dec 29, 2019 9:29 pm
Forum: Lathes
Topic: "Put it in 'R' for Race"
Replies: 12
Views: 1058

Re: "Put it in 'R' for Race"

I had a 40s vintage Pratt & Whitney 14" lathe. There was no provision for reversing the spindle. It would have been possible to install a reversing switch on the motor. If the machine were run in reverse the lube oil pump would not provide oil to the gears and bearings.
by johnfreese
Sun Dec 29, 2019 9:20 pm
Forum: General Discussion
Topic: Ball end mills
Replies: 17
Views: 1644

Re: Ball end mills

Remember with the mill spindle vertical there is zero fpm on the centerline of the cutter. As others suggested tilt the spindle to shift the cutting area away from dead center.
by johnfreese
Sun Dec 29, 2019 9:14 pm
Forum: General Discussion
Topic: Floating reamer holders
Replies: 21
Views: 1324

Re: Floating reamer holders

Look for a used Glenzer or Scully Jones floating holder. I got mine on the Bay.
by johnfreese
Sun Dec 29, 2019 9:09 pm
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 669

Re: How to make small duplicate pieces?

I would hold it in a square 5C in a collet block or indexer.. Use a collet stop to hold length. First do the radius on the end, 2 cuts with a corner rounding cutter. Second square the opposite end to get the OA length. Third, use a slitting saw on the square end. Fourth use a slitting saw on the rou...
by johnfreese
Sat Dec 21, 2019 5:55 pm
Forum: Gunsmithing
Topic: Floating Reamer Holder.
Replies: 2
Views: 388

Re: Floating Reamer Holder.

You can often find used Glenzer or Scully Jones floating holders on the Bay. Both offer radial float but no angular float. A no.2 taper tap driver for a 1/8" pipe tap will drive the reamer. Instead of grinding the flats on the reamer to fit the square in the tap driver I just grip the reamer on the ...
by johnfreese
Mon Dec 02, 2019 5:24 pm
Forum: General Discussion
Topic: What is this thing? Some sort of hand cranked mini rotary saw?
Replies: 2
Views: 821

Re: What is this thing? Some sort of hand cranked mini rotary saw?

It looks like besides sawing it will file miters.
by johnfreese
Wed Nov 20, 2019 6:28 pm
Forum: Lathes
Topic: Graziano SAG12
Replies: 47
Views: 3500

Re: Graziano SAG12

If you can not find an OEM replacement go for a generic control transformer of equivalent capacity. If you can't get one to fit the original space buy an enclosed control transformer and mount it externally.
by johnfreese
Mon Oct 14, 2019 4:42 pm
Forum: Lathes
Topic: Winding springs
Replies: 16
Views: 3583

Re: Winding springs

There is a lot of info on the net regarding spring winding. Do a search. Some good YouTube videos.
I am not sure your MIG wire is hard enough. Music wire is commonly used. Using the quick change box to set pitch is a great idea. On long springs you need to support the mandrel at the right end.