开云体育

Hi Gang: I'm also a model railroader, and this is Zinc Pest. Access to water is a factor, but that can just be high humidity. I have seen it in Lionel products from 2001, so it still happens. There is

I've read that "zinc pest" is caused by lead contamination in the alloy. Back when most folks were just mixing up a batch in their shop, where the term "pot metal" came from, they frequently added a

Agreed. Presumably all of the active ingredients are present in the mix when first cast (I was going to write alloy instead of mix, but I suspect that is where the issue lies.). Presumably that

Over many years of reading about this I can't recall anything I've read where environment mattered.? Either during manufacturing or storage. Charles E. "Chuck" Kinzer

Does environment play any roll?? The diesel loco my father had in which the powered trucks turned to dust was in an Illinois attic (heat/cold/humidity) for about 28 years before I stumbled on it.?

Yes.? "Zinc Pest" as mentioned.? Caused by impurities in the alloy. It is my sense that this is very rare on Unimat parts.? But one bad batch of the alloy can produce a bac batch of parts that will

Zinc pest, for sure. Paul [email protected]> wrote:

I have a DB200 lathe and the Vertical Column Headstock Adapter is in just the worst shape. None of the other casting on the lathe shown any of these signs. Anyone care to guess what caused this?

I use 4 mm polyurethane belts, which is about 5/32" To measure the length, I use an appropriate cord and wrap it around the pulleys. ?I subtract 10% of the length from the measurement determined in

Could be that cylindrical gauges match bearing sizes? They could be used to check machined bearing seats for prescribed fit. -- NapierDeltic

Thanks Richard. With your numbers I moved forward with a bit of polishing on both the hole and the shaft. All is now fitting quite nicely. Cheers, Timothy Jump

Carl, you may be correct. Perhaps a little more background might help us. My step dad first took me to where he worked in 1955. It was the tool room for a large plant. I was not allowed to wander

Hi Larry: I think it is a thickness gage, the difference from one notch to the next is about 0.6 mm. It might have been used for sorting sheet metal?? The notches are not deep enough to check round

For those who do not want to muck up their soldering iron: -227 small drive -237 large drive if you want 3/16" wire just get -327 and -337 but honestly I think they are too tight and will trash your

Carl, Upon closer inspection, thy do seem to be hand made. I can see the bare metal between the "teeth" The ones with points, there are two of them, the angle appears to be 40 degrees. Neither comes

Hello Timothy,?? I measure my U3 at 12.03 for the hole and 11.95 on the pinion (tooth tip to tip) with 11.97 on the pinion shaft.?? Hope that helps!?? Rgrds,?? Richard.

Hello Larry: Can you measure each gap (1-5)? and tell us the sizes? Thanks, Carl.

That makes sense. These belonged to my step father. Before I was in high school, he was a machinist.? He worked in the machine shop at a local mill. He spent over 40 years there later becoming the

I just got a 12mm pinion blank, but to my surprise it does not fit into the Unimat 3 Vertical Milling Attachment. I measured the opening in the milling attachment and it comes in at 11.8mm. So now I'm

I am just guessing here, but they possibly could be shop-made Acme or square thread gauges. Jerry F. Sent: Friday, July 05, 2024 6:33 AM To: Carl; [email protected] Subject: Re: [Unimat] What are