Search found 5526 matches

by SteveM
Wed Feb 21, 2018 5:17 pm
Forum: General Discussion
Topic: Does Motor Oil Corrode Brass?
Replies: 18
Views: 265

Re: Does Motor Oil Corrode Brass?

If you had ever seen what happens to an engine, that was using non-detergent oil, and was changed to detergent oil, you would be a believer. The detergent, does just like it's name, and will clean out all that sludge settled in the pan, the valley and elsewhere in the block, churn it up, and send a...
by SteveM
Wed Feb 21, 2018 8:13 am
Forum: General Discussion
Topic: Does Motor Oil Corrode Brass?
Replies: 18
Views: 265

Re: Does Motor Oil Corrode Brass?

I am amazed how clean a well maintained (ATF lubricated) transmission looks inside though. The best penetrant for getting rusty fasteners loose is a 50/50 mix of ATF and acetone, and the acetone is only there to make it flow and creep better. I have a squirt bottle of it under the bench at all time...
by SteveM
Tue Feb 20, 2018 5:34 pm
Forum: General Discussion
Topic: Offset Torque
Replies: 7
Views: 131

Re: Offset Torque

The reason for the 90 degrees is to minimize the change in length of the lever arm. It's an approximation. Technically, I think that you would want it slightly sharper than 90 degrees, but the difference is probably minimal and they didn't want people having to pull out vernier protractors to get it...
by SteveM
Tue Feb 20, 2018 11:28 am
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

wlw-19958 wrote:
Tue Feb 20, 2018 10:54 am
Just to be clear, the model 97 level has two lines which
are for centering the bubble. The 98 has a series of lines
on either side of the bubble.
Thanks for that info.

Here is a 97:
Starrett97.jpg
Starrett97.jpg (17.91 KiB) Viewed 48 times
And here is a 98:
Starrett98.jpg
Starrett98.jpg (7.49 KiB) Viewed 48 times
Steve
by SteveM
Tue Feb 20, 2018 9:40 am
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

A level is a nulling instrument. Due to symmetry you can more accurately judge that the bubble is centered on zero than that it is exactly as far off on one reading as it was on a previous one. Yes, but there are lines on the tube, and the bubble on a line means the same angle at one end of the bed...
by SteveM
Tue Feb 20, 2018 7:05 am
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

Leveling the bed is really just a convenience; Level is just the most convenient substitute for ensuring that both ends of the bed are in the same plane. I've looked at a lathe, put the level on, took a reading and then checked that the off-level reading was the same at the other end. the lathe cou...
by SteveM
Mon Feb 19, 2018 4:05 pm
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

wlw-19958 wrote:
Mon Feb 19, 2018 1:47 pm
The picture is not a 12" model. It is either 6" or 8"
model.
6" 98's go for about the same on ebay.
wlw-19958 wrote:
Mon Feb 19, 2018 1:47 pm
I cannot tell if this is the 97 model or the 98 from the
pictures provided.
That will make a difference. The OP will have to let us know.

Steve
by SteveM
Mon Feb 19, 2018 1:39 pm
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

12" Starrett 98's will sell all day / any day on ebay for at least $75 (the median sale price is more like $100). I can't see the condition in the picture, but if the base is flat and usable, $60 is pretty reasonable (but bargain as much as you can). If you get it at $60 and it's not up to what you ...
by SteveM
Mon Feb 19, 2018 1:33 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: Free rotary phase converter
Replies: 6
Views: 256

Re: Free rotary phase converter

Ernie's friend found another motor to use, so the rotary phase converter one is still available.

I've cut the price in half.

We'll keep cutting the price in half every hour until someone takes it.

Steve
by SteveM
Mon Feb 19, 2018 8:43 am
Forum: General Discussion
Topic: Machinists Level
Replies: 21
Views: 410

Re: Machinists Level

I can't make any comments for hand scraping, as I do not know enough, but if the level will sit on a surface plate and not rock, it should be good enough for leveling a lathe. A carpenters level is not sufficient. You can check that the level is set correctly, by putting it on a reasonably level sur...
by SteveM
Mon Feb 19, 2018 8:36 am
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: scrap metal prices
Replies: 7
Views: 238

Re: scrap metal prices

wlw-19958 wrote:
Sun Feb 18, 2018 5:22 pm
I think the OP was quoting prices customers pay for pieces of scrap they buy from the dealer and not what the dealer will pay for the scrap.
Yes, that is what I'm looking for. Thanks, Webb.

Steve
by SteveM
Sun Feb 18, 2018 11:56 am
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: scrap metal prices
Replies: 7
Views: 238

scrap metal prices

I wrote down the prices that a local scrap metal yard gave me and now I can't find it. Can some of you reply with prices that you pay for buying scrap (not selling it) at your local yards / machine shops? I may be selling some of my dad's supply today and need to give them prices. I need prices for:...