Search found 1487 matches

by John Hasler
Sat May 09, 2020 7:58 am
Forum: General Discussion
Topic: 4-way toolpost build
Replies: 13
Views: 2287

Re: 4-way toolpost build

I have a toolpost very much like that on my Logan with 10-24 socket head cap screws. It's been working fine for years.
by John Hasler
Wed May 06, 2020 11:41 am
Forum: General Discussion
Topic: Undercuts and stress risers
Replies: 13
Views: 2343

Re: Undercuts and stress risers

earlgo writes:
The area of a 4" diameter section with a 2" diameter central hole is about 9.4 in^2. if the shear strength of malleable iron is 40,000 #/in^2 then the load required to shear the register is about 374000#. New pants and perhaps a new shop, too.

A good forklift driver could do it.
by John Hasler
Wed May 06, 2020 7:55 am
Forum: General Discussion
Topic: Undercuts and stress risers
Replies: 13
Views: 2343

Re: Undercuts and stress risers

Hi all, I have what is likely a basic machining question... I understand it's "best practice" to avoid sharp corners where possible on turned work. But in some cases, a sharp corners is undesirable or may interfere with a mating part. For example, when turning the register on a lathe chuck backplat...
by John Hasler
Fri May 01, 2020 9:23 pm
Forum: General Discussion
Topic: loose screw issue
Replies: 59
Views: 7965

Re: loose screw issue

>This thread reminds me so much of conversations with my son.

It reminds me of a very common type of "minor" engineering project:

"Fix this but don't change anything."
by John Hasler
Thu Apr 30, 2020 2:33 pm
Forum: General Discussion
Topic: loose screw issue
Replies: 59
Views: 7965

Re: loose screw issue

A similar solution is a ball detent.
by John Hasler
Tue Apr 28, 2020 10:31 am
Forum: General Discussion
Topic: loose screw issue
Replies: 59
Views: 7965

Re: loose screw issue

From what I understand the screws will still work even after the nylon is worn out (if it does wear out): they will just have a slight tendency to work loose. Thus the user can put it back in at streamside and then if she later notices that it is working loose order a replacement screw.
by John Hasler
Tue Apr 28, 2020 7:06 am
Forum: General Discussion
Topic: loose screw issue
Replies: 59
Views: 7965

Re: loose screw issue

https://nylok.com/products/nylok-torq-strip This is intriguing! I wonder if I actually used a slitter saw to cut a slot across the face, then wedge a piece of nylon in it. The hole with fishing line it a possibility as well. Do you think I would need epoxy or another glue to hold it in place? I wou...
by John Hasler
Sun Apr 26, 2020 9:22 pm
Forum: General Discussion
Topic: loose screw issue
Replies: 59
Views: 7965

Re: loose screw issue

Rather than putting fishing line in the threads cross-drill the threaded section and press a piece of nylon fishing line into the hole and cut it off at the major diameter. That's essentially how Nylok screws work.

https://nylok.com/products/nylok-torq-strip
by John Hasler
Sat Apr 25, 2020 6:40 pm
Forum: General Discussion
Topic: Bandsaw Blades
Replies: 13
Views: 2750

Re: Bandsaw Blades

You just need to turn your bandsaw inside-out.
by John Hasler
Sat Apr 25, 2020 7:04 am
Forum: General Discussion
Topic: Packing gear cases with grease
Replies: 11
Views: 2166

Re: Packing gear cases with grease

Aren't worm drives usually lubricated with heavy oil?

[Edit] https://khkgears.net/new/gear_knowledge ... gears.html
by John Hasler
Sat Apr 25, 2020 7:02 am
Forum: General Discussion
Topic: Bandsaw Blades
Replies: 13
Views: 2750

Re: Bandsaw Blades

Perhaps your saw is backwards?
by John Hasler
Fri Apr 24, 2020 10:51 am
Forum: Milling Machines
Topic: Mill tooling
Replies: 48
Views: 9945

Re: Mill tooling

Harold writes: One thing that a collet allows is the end mill to move under the cut. Holders, assuming you've tightened the screws properly, avoid that problem. However, the problem is far more imagined than it is truthful, not that it can't happen. Here's the deal. So long as you understand what "t...