Search found 18954 matches

by Harold_V
Thu May 19, 2022 5:11 pm
Forum: Lathes
Topic: Tailstock alignment
Replies: 7
Views: 283

Re: Tailstock alignment

Level isn't critical, but no twist is. Twist results in tapered turning. The closer you get the bed to being straight, the fewer issues you'll have with tailstock alignment. H Not trying to argue this point as I do understand what you mean, but in some cases you need to twist the bed on purpose to ...
by Harold_V
Thu May 19, 2022 2:34 pm
Forum: The Junk Drawer
Topic: Anyone know what this is?
Replies: 20
Views: 301

Re: Anyone know what this is?

Could it have held a globe of Earth?

H
by Harold_V
Wed May 18, 2022 3:56 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 111
Views: 31640

Re: Surface Grinding

The finish, in my estimation, has improved considerably. Frankly, it's an amazing finish considering the light-weight machine from which it came. One of the things I look for in a finish is that there is no waviness, which you had previously. That's an indication of several possible reasons, most of...
by Harold_V
Wed May 18, 2022 3:36 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 111
Views: 31640

Re: Surface Grinding

Your machine, aside from a line down the center, appears to have no means to clamp anything. That image is a close up of vise jaws he ground that are clamped in the drill press vise that is mounted to the table. I must really be losing it! Thanks, Glenn. It's perfectly obvious----yet I managed to m...
by Harold_V
Wed May 18, 2022 1:33 am
Forum: General Discussion
Topic: Surface Grinding
Replies: 111
Views: 31640

Re: Surface Grinding

Interesting! How does one mount the magnetic chuck? Grinders with which I am familiar have T slots at each end to accommodate clamps that restrain them. Your machine, aside from a line down the center, appears to have no means to clamp anything. When sizing for a surface grinder, it's important that...
by Harold_V
Tue May 17, 2022 4:15 am
Forum: General Discussion
Topic: Surface Grinding
Replies: 111
Views: 31640

Re: Surface Grinding

With all that in mind, perhaps I should be happy with what I'm seeing. There's room for improvement, and that will be easy if any of the conditions mentioned are the problem in regards to the wheel and how it is addressed. As for the condition of the machine, you may not have any options, but don't...
by Harold_V
Mon May 16, 2022 3:13 pm
Forum: General Discussion
Topic: Shim a Mill Vise Flat?
Replies: 6
Views: 193

Re: Shim a Mill Vise Flat?

You have NO HOPE of achieving functional work with a fixed jaw that is not perpendicular. You will struggle endlessly and lose confidence in your ability, thinking you are the problem when most likely you are not. It will be a waste of your time to pursue that vise unless you first eliminate the per...
by Harold_V
Mon May 16, 2022 2:45 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 111
Views: 31640

Re: Surface Grinding

I suspect that you will have issues with surface finish with that grinder, and that's due to several factors. It isn't very rigid, and it is most likely not three phase. To hope for exceptional results from those two conditions is a rather ambitious expectation. Check the wheel on the hub for tightn...
by Harold_V
Sun May 15, 2022 3:31 am
Forum: Lathes
Topic: Tailstock alignment
Replies: 7
Views: 283

Re: Tailstock alignment

You need to understand that an aligned tailstock doesn't necessarily equate to a lathe that cuts straight when machining between centers. That's due to minor height differences between the headstock and the tailstock, which are almost never in true alignment with one another. That, too, is related t...
by Harold_V
Fri May 13, 2022 11:26 pm
Forum: General Discussion
Topic: Get Material Flat in Vise
Replies: 24
Views: 706

Re: Get Material Flat in Vise

If I got a used Kurt vise, would it still be as accurate as a new Kurt ? Depends on what it's been through. My first Kurt is more than 50 years old and still does a great job. It has had no maintenance, not even the jaws reground. Second one is about ten years old, but looks the same as the day it ...
by Harold_V
Fri May 13, 2022 4:10 pm
Forum: General Discussion
Topic: Get Material Flat in Vise
Replies: 24
Views: 706

Re: Get Material Flat in Vise

I was not planning on a new vise. I strongly suggest you review that decision. How did machinists deal with this in the "good old" days. Kurt vises look quite pricey. By using large soft hammers (typically cast of lead). Even then, the problem wasn't solved. They lived with the conditions that coul...
by Harold_V
Fri May 13, 2022 4:01 pm
Forum: Build Log
Topic: "If at first you don't succeed..." Indiana Northern #4- Allen 0-4-0
Replies: 22
Views: 2898

Re: "If at first you don't succeed..." Indiana Northern #4- Allen 0-4-0

You just need to remember to purchase endmills with a long enough cutting surface in order to be able to cut the entire thickness. I've seen it happen where folks forget and then they have a small lip at the end. The lip can be avoided by relieving the shank of the end mill in use so a deeper cut c...