Search found 16945 matches

by Harold_V
Tue Jan 29, 2019 4:00 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 415
Views: 53734

Re: 12" working railroad

Thanks for submitting the picture. According to administration, the bug has been successfully addressed, so you should be able to post your pictures now. We appreciate the report of the problem you discovered. It's nearly impossible for us to find all the potential problems, so we rely on help from ...
by Harold_V
Tue Jan 29, 2019 2:55 am
Forum: General Discussion
Topic: Best tap for aluminum
Replies: 12
Views: 738

Re: Best tap for aluminum

Spiral flute taps are supposedly as good in the other direction, but I find them weaker in general and not very effective in some materials. Spiral flute taps are also often more expensive. I share your position with spiral flute taps. My experience in using them leaves a little to be desired. I al...
by Harold_V
Mon Jan 28, 2019 3:49 pm
Forum: Lathes
Topic: Piston or Wedge
Replies: 16
Views: 846

Re: Piston or Wedge

BTW, I typed AXA but meant BXA and I could not find how to edit my post. Am I missing an option button somewhere or is there a time thing involved? Thanks to the edit feature being abused by one reader, it has been removed from the board, although moderators still have the ability to edit in their ...
by Harold_V
Mon Jan 28, 2019 2:24 am
Forum: Lathes
Topic: Piston or Wedge
Replies: 16
Views: 846

Re: Piston or Wedge

I understand the KDK to be gone, too, Richard. The last time I used one was in 1967. The shop in which I worked is gone, as well (United Precision Manufacturing, in Salt Lake City, Utah)!

I've not experienced the Dorian. Must be pretty good.

H
by Harold_V
Sun Jan 27, 2019 5:10 pm
Forum: Lathes
Topic: Piston or Wedge
Replies: 16
Views: 846

Re: Piston or Wedge

Aside from using an indexing square holder, my greatest experience is with the KDK post, which is also a wedge design. I was quite impressed with them, and used several sizes. One of them was on a 42" Dean Smith Grace lathe. Heavy holders, not fun to change, but up to the task.

H
by Harold_V
Sun Jan 27, 2019 5:01 pm
Forum: Casting & Foundry Work
Topic: Release agent question
Replies: 9
Views: 513

Re: Release agent question

Furan is one of the chemical processes that result in a hard mold. Like hardening with CO2 and sodium silicate, the mold is far more rugged than green sand. While I am aware of the Furan process, I know little about it. I do know that considerable equipment is required for its use. It is reconstitut...
by Harold_V
Sun Jan 27, 2019 5:30 am
Forum: Casting & Foundry Work
Topic: Release agent question
Replies: 9
Views: 513

Re: Release agent question

While not the topic at hand, I have not great memories of the time I made a pattern and finished it with shellac. The foundry that did the casting used the Furan process, which fused the mold to the pattern. You're wise to be concerned for that reason.

H
by Harold_V
Sun Jan 27, 2019 3:05 am
Forum: Lathes
Topic: New-to-Me Logan 400
Replies: 14
Views: 978

Re: New-to-Me Logan 400

The 120 positions offers a lot of flexibility, with precision. It would be more difficult to create, however, and with multiple heads, the advantages may not be worth the effort, as you would be able to simply mount more tools instead of making one serve more than one purpose. You likely noticed tha...
by Harold_V
Sat Jan 26, 2019 4:59 pm
Forum: Lathes
Topic: New-to-Me Logan 400
Replies: 14
Views: 978

Re: New-to-Me Logan 400

Your plan would work quite nicely with the OK Rubber Welder type head, assuming you could find multiples. The T holder is restrained by a pair of socket head cap screws, this the base is independent of the tool block. However, the advantage of using that concept would be lost to some degree, as chan...
by Harold_V
Sat Jan 26, 2019 4:05 am
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 415
Views: 53734

Re: 12" working railroad

You should have received an email from me, requesting a couple of the resized pictures that you are unable to post. If not, please check your junk file.
Thanks.

H
by Harold_V
Sat Jan 26, 2019 2:44 am
Forum: Lathes
Topic: New-to-Me Logan 400
Replies: 14
Views: 978

Re: New-to-Me Logan 400

It looks like this: I couldn't help but notice the compound set on the proper side for threading towards the tailstock with the tool at the rear. Well done! Nice looking holder, by the way. I specialized in small work when my shop was in operation. For the size work I did, I preferred an indexing t...
by Harold_V
Fri Jan 25, 2019 5:11 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 415
Views: 53734

Re: 12" working railroad

I have made mention to administration the problem you've reported in posting resized pictures.

H