Search found 205 matches

by johnfreese
Tue Jun 22, 2021 5:01 pm
Forum: General Discussion
Topic: Heat treat temperature calibration
Replies: 22
Views: 2103

Re: Heat treat temperature calibration

PID temperature controllers with digital readout are quite cheap as are the thermocouples to go with them. Check the bay.
by johnfreese
Tue Jun 22, 2021 4:37 pm
Forum: General Discussion
Topic: Bearing race nomenclature
Replies: 39
Views: 7267

Re: Bearing race nomenclature

I can't remember the name of the company that made unground thrust bearings. The races had V grooves resulting in 4 point contact.
by johnfreese
Wed Apr 28, 2021 7:54 pm
Forum: Lathes
Topic: I bought an adjustable 3 Jaw chuck
Replies: 17
Views: 9401

Re: I bought an adjustable 3 Jaw chuck

I have a 6.5" Yuasa with 3 adjusting screws. Getting work dialed in with 3 screws can be very frustrating.
by johnfreese
Sat Apr 24, 2021 12:22 am
Forum: General Discussion
Topic: Material recommendation please
Replies: 11
Views: 3019

Re: Material recommendation please

I would split them on a vertical band saw.
by johnfreese
Sat Apr 24, 2021 12:17 am
Forum: General Discussion
Topic: Effects of Hardening/Tempering
Replies: 7
Views: 2670

Re: Effects of Hardening/Tempering

I wonder if adding powdered charcoal to the boric acid would prevent all de-carb.
by johnfreese
Sat Apr 24, 2021 12:13 am
Forum: General Discussion
Topic: Gear Repair.
Replies: 19
Views: 6040

Re: Gear Repair.

Check Flea Bay for 16DP gears.
by johnfreese
Mon Feb 08, 2021 9:55 pm
Forum: Lathes
Topic: Should I make a bearing follower rest
Replies: 8
Views: 3088

Re: Should I make a bearing follower rest

I was wondering if carbide tips would work. They would have to be dead nuts square with the finger. Has anybody tried it?
by johnfreese
Sun Feb 07, 2021 11:00 am
Forum: General Discussion
Topic: Rotary Table
Replies: 29
Views: 8318

Re: Rotary Table

Pick up a split MT2 drill driver. The will probably cone in odd sizes like the tap drill sizes. Machine a stepped pin so one end fits the drill driver and the other is the size you want. There are tap drivers and reamer drivers that ill work just as well. I have a local source. PM me if you want me ...
by johnfreese
Thu Jan 21, 2021 6:17 pm
Forum: Milling Machines
Topic: Boring/Facing head questions
Replies: 10
Views: 3653

Re: Boring/Facing head questions

On many boring and facing heads the facing (or grooving) motion is easily controlled. The operator holds a knurled ring to start facing. Every time the operator feels or hears a click the tool moves a definite amount. On some heads it is possible to set up multiple clicks per revolution. By counting...
by johnfreese
Mon Jan 11, 2021 7:15 pm
Forum: General Discussion
Topic: Old brazed on carbide facemill inserts?
Replies: 7
Views: 3867

Re: Old brazed on carbide facemill inserts?

I would have it resharpened. Use it until the carbide is dull, then discard it. Insert type face mills are relatively inexpensive and offer more favorable cutting geometry.
by johnfreese
Mon Dec 28, 2020 7:17 pm
Forum: General Discussion
Topic: Turning a soft materiel
Replies: 11
Views: 3311

Re: Turning a soft materiel

I worked in a small non union shop. The CNC lathe operator was a former UAW member. At the end of a job he would strip all the tools from the lathe. On one rush job we were running the lathe 3 shifts. During my shift we I kept editing the speeds and feeds and got a 4 minute run time down to 2 minute...
by johnfreese
Mon Dec 21, 2020 6:58 pm
Forum: General Discussion
Topic: Adjustable Angle Plate
Replies: 11
Views: 3444

Re: Adjustable Angle Plate

Set the sine bar on the tilt table upside down (rolls facing up). Use a height gauge to measure the vertical distance between the rolls.