Search found 190 matches

by johnfreese
Tue May 19, 2020 5:37 pm
Forum: Welding
Topic: Tig welding a tractor part?
Replies: 15
Views: 2693

Re: Tig welding a tractor part?

The appearance of the fracture surface in cast iron is unique. Broken cast iron pieces fit together without gaps.
by johnfreese
Tue May 19, 2020 5:13 pm
Forum: General Discussion
Topic: Annular cutters
Replies: 16
Views: 2523

Re: Annular cutters

They work quite nicely in a 3/4 collet. There are straight shank and MT shanks available. I have an MT3 shank. I don't know if MT2 is available. I have a 5/8" straight shank holder I don't use but is missing the spring and pilot.
by johnfreese
Mon May 18, 2020 7:55 pm
Forum: General Discussion
Topic: CCMT recycle face mills
Replies: 29
Views: 4041

Re: CCMT recycle face mills

Guess I should have noticed there were 2 more pages of replies before adding my 2 cents worth. Other contributors covered the issue nicely.
by johnfreese
Mon May 18, 2020 7:52 pm
Forum: General Discussion
Topic: CCMT recycle face mills
Replies: 29
Views: 4041

Re: CCMT recycle face mills

Shars also sells that kind of face mill. It is rather inexpensive. Another option is a lathe toolholder that hols them "sideways". You can get lead angle turning tools or chamferingg tools. Again Shars sells them.
by johnfreese
Mon May 18, 2020 7:47 pm
Forum: Welding
Topic: Tig welding a tractor part?
Replies: 15
Views: 2693

Re: Tig welding a tractor part?

I just learned it is possible to TIG weld cast iron using cast iron rod. Alternatively torch weld it with cast iron rod using flux. I have been torch welding it for years. In many cases Tig would have been easier. If it is cast iron preheat and postheat with slow cool are essential. On critical part...
by johnfreese
Sat Apr 18, 2020 9:29 am
Forum: General Discussion
Topic: Anyone know how to disassemble this chuck?
Replies: 12
Views: 2511

Re: Anyone know how to disassemble this chuck?

I have a small chuck similar to yours. The major difference is that my scroll is retained by a snap ring instead of an interference fit retainer. You might consider cutting a groove in the body for a snap ring. It would simplify disassembly the next time you want to clean the scroll.
by johnfreese
Tue Mar 10, 2020 10:48 am
Forum: General Discussion
Topic: Turning small diameters, right/wrong way
Replies: 17
Views: 4137

Re: Turning small diameters, right/wrong way

If the part were turned between centers it would not matter what sequence of cuts were taken. If the part is supported in the chuck only then the sequence should be smallest diameter first, then the successively larger diameters.
by johnfreese
Sun Mar 01, 2020 5:23 pm
Forum: Live Steam
Topic: Reaming vs. Drilling Holes In Tube Sheets
Replies: 38
Views: 14237

Re: Reaming vs. Drilling Holes In Tube Sheets

Using a twist drill to make holes in thin materials usually results in a 3 lobed hole. Step bits cut a perfectly round hole. Blair and Hougen sell multi tooth hole cutters. To get the correct clearance needed for the tubing being used may require the hole be cut undersized and reamed to diameter.
by johnfreese
Sun Mar 01, 2020 5:07 pm
Forum: General Discussion
Topic: Dead soft Aluminum
Replies: 14
Views: 3254

Re: Dead soft Aluminum

Check out the aluminum sheet in the hobby metals of a home improvement store. I think you will find it soft.
by johnfreese
Sun Feb 23, 2020 10:02 pm
Forum: General Discussion
Topic: hardening and tempering
Replies: 20
Views: 3877

Re: hardening and tempering

To get a rapid quench in water the water must be agitated or the part moved rapidly through the quench. If the part is held still and the quench is not agitate a layer of steam will form around the part which acts as an insulator.
by johnfreese
Fri Feb 14, 2020 3:10 pm
Forum: General Discussion
Topic: How To Remove Threaded End Of Broken Pipe?
Replies: 8
Views: 2227

Re: How To Remove Threaded End Of Broken Pipe?

I have removed a lot of broken pipe stubs using a hacksaw blade. Make 3 or 4 slits inside the pipe stub. Go deep enough to see the beginning of threads. Using a pointed punch, applied next to a slit,collapse the pipe stub. After that you should be able to back out the stub with needle nose pliers.
by johnfreese
Fri Feb 14, 2020 2:27 pm
Forum: General Discussion
Topic: Good price for 1144 round at Fastenal
Replies: 13
Views: 3215

Re: Good price for 1144 round at Fastenal

Last fall I went to the local Fastenal store. They had a sign static that they would only sell to business accounts.