Search found 1514 matches

by John Hasler
Sat Sep 19, 2020 7:29 am
Forum: Lathes
Topic: Trying to prevent ribbing on tapers
Replies: 19
Views: 437

Re: Trying to prevent ribbing on tapers

Harold writes:
> Filing offers the opportunity for further damage, as file pinning, especially with aluminum or mild steel, is an ongoing problem.

"File pinning"?
by John Hasler
Wed Sep 16, 2020 8:53 pm
Forum: Lathes
Topic: Logan 925, I think
Replies: 6
Views: 106

Re: Logan 925, I think

You want to go to lathe.com, the Logan Web site.

Go to http://www.lathe.com/models.htm to identify your machine. https://store.lathe.com/pl-11.html seems to be parts list and instructions for the 925. Also try emailing Scot Logan.
by John Hasler
Wed Sep 16, 2020 10:41 am
Forum: Welding
Topic: Flux Core fumes
Replies: 6
Views: 139

Re: Flux Core fumes

I learned the hard way how bad Silver brazing can be. Wow! That can prove deadly! Cadmium is used to control oxidation of the copper in (some) silver solder. It is a known killer. Could you please provide some details of your experience? H The symptoms of acute[1] cadmium poisoning are respiratory,...
by John Hasler
Tue Sep 15, 2020 7:09 pm
Forum: Lathes
Topic: Estimating chuck speeds
Replies: 11
Views: 170

Re: Estimating chuck speeds

I put a small yellow dot sticker on my lathe chuck and then used a tachometer app on my Iphone to estimate the chuck speed. I'm not convinced that the results were all that accurate. I don't have a belt/speed chart for my lathe. Are there any good methods to figure out how fast your lathe is spinni...
by John Hasler
Mon Sep 14, 2020 7:56 am
Forum: General Discussion
Topic: Machinist's Level help
Replies: 57
Views: 1398

Re: Machinist's Level help

I don't understand. It is a chord that I cut from a brake rotor, and I've milled half an inch into the top fins and around 100 thou into the bottom already. I feel as though I need to place it into a 500F oven for half a day and let it cool, and then lap it again on my surface plate. Milling it for...
by John Hasler
Fri Sep 11, 2020 7:40 am
Forum: General Discussion
Topic: Machinist's Level help
Replies: 57
Views: 1398

Re: Machinist's Level help

ctwo wrote:
Thu Sep 10, 2020 9:46 pm
...maybe I will just mill out the center 1/4 of the span.
I agree with Harold. Don't do that. Don't even drill it.
by John Hasler
Wed Sep 09, 2020 7:34 pm
Forum: General Discussion
Topic: Machinist's Level help
Replies: 57
Views: 1398

Re: Machinist's Level help

Some precision levels have a foot at each end rather than a continuous flat bottom. This eliminates the possibility of teetering. You can get the same effect by placing a gauge block under each end though of course that adds uncertainty.
by John Hasler
Tue Sep 08, 2020 3:54 pm
Forum: General Discussion
Topic: Machinist's Level help
Replies: 57
Views: 1398

Re: Machinist's Level help

Assume that the level is out of adjustment such that when placed on the mythical truly, totally level surface it would read one division off. That means that the actual zero position of that level in its out of adjustment state is one division away from the point on the scale marked "0". Thus when i...
by John Hasler
Sat Sep 05, 2020 10:22 pm
Forum: General Discussion
Topic: New Table For The Avey: Photos
Replies: 3
Views: 145

Re: New Table For The Avey: Photos

I'm replacing the little Grizzly table on my Avey frankenmill with one from a Burgmaster machine (Does that make it an Aveymaster or a Burgavey?). 12" x 42" table, 24" X travel, 12" Y travel. 1.25" shaft ways with two 4" linear ball bearings on each. 1.125" 5 TPI acme screws with adjustable zero bac...
by John Hasler
Sat Sep 05, 2020 9:58 pm
Forum: General Discussion
Topic: New Table For The Avey: Photos
Replies: 3
Views: 145

Re: New Table For The Avey: Photos

More photos:
burgmaster_table_plus_saddle.jpg
burgmaster_table_plus_saddle.jpg
burgmaster_table_plus_saddle3.jpg
by John Hasler
Sat Sep 05, 2020 9:54 pm
Forum: General Discussion
Topic: New Table For The Avey: Photos
Replies: 3
Views: 145

New Table For The Avey: Photos

I'm replacing the little Grizzly table on my Avey frankenmill with one off of a Burgmaster mill. Photos:
burgmaster_base.jpg
burgmaster_base2.jpg
burgmaster_base3.jpg
burgmaster_end_view.jpg
burgmaster_inside_saddle.jpg
by John Hasler
Sat Sep 05, 2020 1:03 pm
Forum: General Discussion
Topic: Valve Guide Material?
Replies: 34
Views: 6062

Re: Valve Guide Material?

liveaboard writes: "The main problem was that those things were designed in the 50's." Sounds more like they were poorrly designed, in the 50's. No motorcycles, but most US made stuff I've used and/or repaired that was designed in the 50's was well designed. Even the cheap, flimsy stuff (mostly didn...