Search found 258 matches

by f350ca
Tue Jan 28, 2020 11:13 am
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 29
Views: 3248

Re: Change lead screw to metric?

I had to make a new lead screw for the compound after a crash. I ground an 29 degree acme cutter, when I check the fit on the bent screw it didn't match. Hum. Did some research and found there was a 30 degree metric version of acme. Ground that and it matched. The new screw fit the nuts perfect.

Greg
by f350ca
Mon Jan 27, 2020 5:45 pm
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 29
Views: 3248

Re: Change lead screw to metric?

I have a 16 x 80 lathe imported from Poland by Summit Machine Tools. It has inch pitch lead screws that are metric diameter and trapezoidal metric thread form.

Greg
by f350ca
Wed Jun 05, 2019 9:08 am
Forum: Request For Services
Topic: Need coupling bored and key way broached
Replies: 6
Views: 2920

Re: Need coupling bored and key way broached

Use a stepped key.

Greg
by f350ca
Tue Apr 09, 2019 10:31 pm
Forum: General Discussion
Topic: Measuring a diameter without a caliper
Replies: 19
Views: 5137

Re: Measuring a diameter without a caliper

Marv is right, I have a PI tape that uses a vernier to read to 3 decimals. But it assumes the part is round and gives the average dia. The tape measures that crank into a housing are flat, ie no form to keep them straight so they will wrap around a cylinder. Think they're only divided in 1/8ths thou...
by f350ca
Fri Mar 08, 2019 11:06 pm
Forum: Milling Machines
Topic: Riser block
Replies: 22
Views: 7452

Re: Riser block

My mill uses long bolts with I think its a 10 inch riser. I have some 12 inch 1/4 wall pipe if your anywhere close.

Greg
by f350ca
Mon Nov 12, 2018 11:17 pm
Forum: Milling Machines
Topic: Cinti ToolMaster 1D variable speed pulley & motor shaft ?
Replies: 18
Views: 6227

Re: Cinti ToolMaster 1D variable speed pulley & motor shaft ?

Harolds idea is quite feasible, I made a smaller one for the variable drive on an old Delta scroll saw. Tried to post a picture but forgot how. Made it up with a plate and shaft weldament. There are two part putties that you need then cure with heat from a light bulb. High heat resistance and tough,...
by f350ca
Thu Jun 07, 2018 1:06 pm
Forum: Milling Machines
Topic: Milling a helix
Replies: 67
Views: 23656

Re: Milling a helix

You mentioned cutting the worm on a lathe. My Summit will cut 1/4 tpi, 4 inch pitch, slowest speed 20 rpm would give a carriage speed of 1 1/3 inches per second. I've never used that setting. Would you use a single point cutter or some sort of milling attachment. Square thread form is the only thing...
by f350ca
Tue May 29, 2018 5:55 pm
Forum: General Discussion
Topic: First cut with a shaper
Replies: 11
Views: 2332

Re: First cut with a shaper

I agree with Harold on using HSS but I've had good results with brazed carbide cutters on large cast iron parts where the HSS would dull before finishing the face.

Greg
by f350ca
Tue May 29, 2018 5:51 pm
Forum: The Junk Drawer
Topic: Disinfecting a well
Replies: 27
Views: 12062

Re: Disinfecting a well

I dump a gallon in every few years let it sit for an hour then pump it out. If you bleed the mix into each line and let it sit you should get everything.

Greg
by f350ca
Sat May 12, 2018 9:20 pm
Forum: General Discussion
Topic: Shaper forum??
Replies: 20
Views: 4053

Re: Shaper forum??

I produced a lot of odd parts on an 8 inch Logan. They're slow by todays standards but cheap to operate and can do some things standard machine tools can't. I added a DRO to the Logan and used it to cut 5 foot long racks for a CNC plasma table. As near as I can measure using a 24 inch dial calliper ...
by f350ca
Thu Mar 01, 2018 9:22 am
Forum: Lathes
Topic: Lathe DRO recommendation
Replies: 29
Views: 11159

Re: Lathe DRO recommendation

The magnetic scales sold by DRO Pros seam to use a magnetic tape with an adhesive back that you bond to an aluminum extrusion. Aluminum has a high coefficient of thermal expansion, about 3 to 4 times glass depending on the material. On a 12 inch scale with a 10 deg f change, the length of the magnet...
by f350ca
Thu Jun 15, 2017 8:34 pm
Forum: Lathes
Topic: Threading to a shoulder
Replies: 26
Views: 8370

Re: Threading to a shoulder

The Hardinge HVL has a travel stop on the carriage for threading. You leave the 1/2 nuts locked. When it hits the stop the carriage stops and the cutter makes its own relief groove. A quick retract on the compound moves the tool back, you flip a leaver to reverse the carriage which stops on a back s...