Search found 155 matches

by johnfreese
Fri Jun 28, 2019 12:45 pm
Forum: General Discussion
Topic: Reaming Cast Steel Fittings without a Mill
Replies: 27
Views: 1221

Re: Reaming Cast Steel Fittings without a Mill

The hoe cutters should do well provided you can pilot them on the existing bore. As NP317 sail rigid support is essential.
by johnfreese
Sat Jun 22, 2019 3:57 pm
Forum: Lathes
Topic: Just Getting Started
Replies: 6
Views: 604

Re: Just Getting Started

South Bend had a series of booklets with lathe projects and application of the lathe in various industries A lot of those are available on line. Of course How to Run a Lathe is the essential resource. American practice at the time was to use a lantern toolpost. The toolholders for the lantern toolpo...
by johnfreese
Fri Jun 21, 2019 2:29 pm
Forum: General Discussion
Topic: What is this for?
Replies: 4
Views: 928

Re: What is this for?

The bracket on the overarm probably held the pipe for coolant or cutting oil.
by johnfreese
Tue Jun 18, 2019 2:04 pm
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 1525

Re: Turning plastic on a metal lathe

My biggest problem turning plastics is chip control. The softer plastics machine best with high positive rake. That pretty much guarantees one continuous chip for the entire cut. I had one job boring PVC pipe fittings. I set it up on the lathe with a high positive rake boring bar. I had the shop vac...
by johnfreese
Tue May 28, 2019 7:24 pm
Forum: Milling Machines
Topic: Glass Bead Blasting Old Mill Vice
Replies: 18
Views: 3214

Re: Glass Bead Blasting Old Mill Vice

I have done it. It works well. Not great on thick greasy crud. Scrape it off first.
by johnfreese
Tue May 28, 2019 7:22 pm
Forum: General Discussion
Topic: Drilling UHMW
Replies: 6
Views: 2157

Re: Drilling UHMW

Sometimes I just press the work against the chuck jaws. The UHMW is probably too slick for that to work. Some people face off a blank, then cut some circular grooves in the face and then attach the work to the blank with super glue. The grooves provide space for excess glue. After machining the work...
by johnfreese
Tue May 28, 2019 11:56 am
Forum: General Discussion
Topic: Drilling UHMW
Replies: 6
Views: 2157

Re: Drilling UHMW

Band saw the blanks and finish in the lathe. Pressure turning is the easiest. Put a 4" steel bar in the lathe. Face it off. Glue a piece of coarse sandpaper to it, press the blank against the sandpaper using the tailstock. Take light cuts to finish the OD.
by johnfreese
Wed May 15, 2019 5:05 pm
Forum: General Discussion
Topic: Does anyone recognize this drill sharpening jig
Replies: 6
Views: 1324

Re: Does anyone recognize this drill sharpening jig

Maybe this will help figure out what parts you need to make.
http://www.hemingwaykits.com/acatalog/i ... 311%2ehtml
by johnfreese
Mon May 06, 2019 4:50 pm
Forum: Milling Machines
Topic: Machinist Jacks
Replies: 18
Views: 2349

Re: Machinist Jacks

The biggest use of jacks was on planers. They were used to position parts. usually castings, to get the top surface level. They were also used under clamps where the part did not touch the table. They prevented distortion when the clamp was tightened. Any of the old time machining textbooks show the...
by johnfreese
Mon May 06, 2019 4:42 pm
Forum: General Discussion
Topic: New to me Taft Pierce #1 surface grinder
Replies: 4
Views: 1069

Re: New to me Taft Pierce #1 surface grinder

I have the same model grinder. I did get some documentation on line, not much. I would be happy to share. On mine everything is as smooth as glass except the Z axis feed. The documentation I have shoes pictures of the parts but very little of how things fit together. I really don,t have any idea whe...
by johnfreese
Fri May 03, 2019 4:58 pm
Forum: Milling Machines
Topic: Machinist Jacks
Replies: 18
Views: 2349

Re: Machinist Jacks

Watch enough You Tube videos on machining. You will see machinist jacks in use. Start with Stefan Gotteswinter.
by johnfreese
Tue Apr 23, 2019 1:27 pm
Forum: General Discussion
Topic: Gear sources
Replies: 6
Views: 1833

Re: Gear sources

Check the eBay vendors. They will be 20* pressure angle and metric module.