Search found 19815 matches

by Harold_V
Tue Feb 20, 2024 2:26 am
Forum: General Discussion
Topic: End mill dish angle?
Replies: 4
Views: 388

Re: End mill dish angle?

Although considering the time spent dealing with it, it's probably better to just toss the dull ones and buy new. But then, I'm a genetic tightwad. Depends. It's not always about money, and I'm no different than you are. I don't spend unnecessarily. Back to the point---it's very nice to have the ab...
by Harold_V
Mon Feb 19, 2024 4:19 pm
Forum: Lathes
Topic: New Knurling tool
Replies: 17
Views: 1382

Re: New Knurling tool

Nice looking knurling tool, Kelly.

H
by Harold_V
Mon Feb 19, 2024 4:18 am
Forum: General Discussion
Topic: End mill dish angle?
Replies: 4
Views: 388

Re: End mill dish angle?

45' (minutes) is adequate, assuming the end has been gashed and ground properly. It ensures that the flat area (formed by the gash) doesn't protrude (towards the material being machined) beyond the tips of the cutting edge, which would leave a slightly recessed center to the cut. Said another way, i...
by Harold_V
Fri Feb 16, 2024 4:55 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: Tools for sale
Replies: 3
Views: 338

Re: Tools for sale

As a moderator I am unaware of any restrictions on where one's first post may be placed. It isn't uncommon for a new reader to join the board strictly with the idea in mind of liquidating tools that are no longer needed or were inherited. Once gone, there would be no further offerings, unlike folks ...
by Harold_V
Thu Feb 15, 2024 4:07 am
Forum: Lathes
Topic: Left handed lathe, for lack of a better name
Replies: 31
Views: 1374

Re: Left handed lathe, for lack of a better name

I recently worked on a good sized Harrison lathe, it and its sister lathe were both ordered new in 1978. For some reason the then owner of this shop had one of the lathes built with the cross slide dial left of the carriage feed. That isn't all that uncommon. Many years ago I operated a 24"/48...
by Harold_V
Thu Feb 15, 2024 3:58 am
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: SB chucks rotary table and misc.
Replies: 12
Views: 635

Re: SB chucks rotary table and misc.

At least one more (me) feels the same way about it. Out of curiosity I clicked the first link and found absolutely nothing that made sense. I closed the link and moved on to matters of more importance. I don't understand the appeal that Fakebook has for folks, and do not spend my time there as a res...
by Harold_V
Tue Feb 13, 2024 5:09 pm
Forum: General Discussion
Topic: Alloy similar to keys
Replies: 13
Views: 672

Re: Alloy similar to keys

If you intend to buy the material, you won't go wrong selecting phosphor bronze. It's a little tough to machine, but has excellent qualities. Strangely, if you make your choice leaded phosphor bronze, it goes from being a little tough to machine to being one of the best machining materials you'll ev...
by Harold_V
Tue Feb 13, 2024 1:19 am
Forum: Build Log
Topic: Northern 4-8-4 Build 3/4”
Replies: 276
Views: 62145

Re: Northern 4-8-4 Build 3/4”

apm wrote: Mon Feb 12, 2024 6:44 pm (is it a spindle even if it doesn't spin? I don't know the word for it).


Generally referenced as the quill or spindle.

H
by Harold_V
Sun Feb 11, 2024 6:06 pm
Forum: Milling Machines
Topic: Looking at an Index 645
Replies: 34
Views: 7298

Re: Looking at an Index 645

need to re-plumb the one shot lube lines, I own a Bridgeport, purchased new in '77. It has the Bijur one shot lubrication system. The machine sat idle for a few years so the one shot system didn't get used. From this experience I learned that, if one is using Vactra (in my case it's Vactra 2), the ...
by Harold_V
Thu Feb 08, 2024 4:34 pm
Forum: Lathes
Topic: How is it possible?
Replies: 4
Views: 431

Re: How is it possible?

Bill Shields wrote: Thu Feb 08, 2024 12:54 pm Some bushings can be adjusted on the fly (hydraulically) to really grip the stock for specific operations,
Not exactly new technology. Cincinnati used that feature with their precision grinders. They called it a Filmatic bearing.

H
by Harold_V
Tue Feb 06, 2024 4:28 pm
Forum: Lathes
Topic: rusty compound slide ways - a death sentence?
Replies: 12
Views: 60042

Re: rusty compound slide ways - a death sentence?

Something else to try would to be to indicate the ID of the jaw surfaces - e.g. mount the chuck on the spindle, turn the chuck slowly by hand, Unless the jaws are rigid in the slides, that's a worthless test to perform, as they won't be loaded against the scroll so they most likely will occupy spac...
by Harold_V
Tue Feb 06, 2024 4:10 am
Forum: Lathes
Topic: rusty compound slide ways - a death sentence?
Replies: 12
Views: 60042

Re: rusty compound slide ways - a death sentence?

The triangle that forms (on the gripping surfaces of the jaws) appears to be roughly the same size on all three sides, so I don't think I'd worry too much about the gaps you speak of. They have nothing to do with the operation of the chuck aside from determining the minimum size the chuck can grip. ...