Search found 621 matches

by rudd
Tue Jul 23, 2019 8:41 pm
Forum: General Discussion
Topic: Consequences due to lack of penetration because of inexperience welders.
Replies: 4
Views: 166

Re: Consequences due to lack of penetration because of inexperience welders.

It's really hard to police. I'm an Architect. We require copies of welders certs for items like this. It is usually a fight to get them. I have no way of knowing if the person named on the certification is actually doing the welds. Not too many years ago, a new church was being built here in town. T...
by rudd
Sun Jul 14, 2019 2:07 pm
Forum: Lathes
Topic: Enlarging Taper in Tailstock Quill--Pros? Cons?
Replies: 15
Views: 440

Re: Enlarging Taper in Tailstock Quill--Pros? Cons?

I doubt "call Enco" is going to be a solution. I think that lathe is no longer in production. Some folks think Grizz parts may interchange, some folks think Jet parts may interchange. For me, centers fail at the tip, so diameter of the shank isn't an issue. Consider that the shank is essentially ful...
by rudd
Fri Jul 05, 2019 10:49 am
Forum: Live Steam
Topic: Purpose of False Valve Seats
Replies: 8
Views: 621

Re: Purpose of False Valve Seats

yes, that sounds like a false seat. Why would it be steel with all the associated rust issues? Maybe not a problem on a model, but I'd think cast iron would be a better material for several reasons. Corrosion (CI develops a "skin" that slows further corrosion), wear, and the porosity of the iron to ...
by rudd
Fri Jul 05, 2019 10:03 am
Forum: Live Steam
Topic: Purpose of False Valve Seats
Replies: 8
Views: 621

Re: Purpose of False Valve Seats

Not sure about models, but this was often done on prototype slide valve engines when the valve seat became too worn to straighten out and maintain the alignment with the gland/valve rod. Mill the top off the valve seat down enough to install a "false seat" - a slab-o-arn with the ports cut into it a...
by rudd
Sat Jun 29, 2019 9:53 am
Forum: Live Steam
Topic: Searching for a unique protoype? here's the jackpot!
Replies: 5
Views: 952

Re: Searching for a unique protoype? here's the jackpot!

one of the underlying problems is: If you can only find the prototype on a site like this...then there is a very strong probability that it was a dud from the get go...and what is the point of making a model of a dodo bird? :P I dunno. I haven't had a drink in over 10 years, but I used to really li...
by rudd
Thu Jun 27, 2019 7:35 pm
Forum: Live Steam
Topic: Searching for a unique protoype? here's the jackpot!
Replies: 5
Views: 952

Searching for a unique protoype? here's the jackpot!

Beware, this can turn into one of those time vacuums!
http://douglas-self.com/MUSEUM/LOCOLOCO/locoloco.htm
by rudd
Sun Jun 23, 2019 8:56 pm
Forum: Lathes
Topic: Threading
Replies: 13
Views: 1144

Re: Threading

I think you you've done a good job of analyzing what went wrong. You *might* be able to anneal the bar to get it soft enough to thread. I don't think switching to HSS is going to be better, I think it will be worse as HSS is softer than carbide. I understand the though of trying to be a tiny bit bel...
by rudd
Sat Jun 15, 2019 1:42 pm
Forum: Lathes
Topic: Boring large holes/product review
Replies: 1
Views: 375

Boring large holes/product review

I'm s l o w l y building a live steam loke. The engine I am modeling has the sloped cylinders, Argent 3. No castings avail. of course. I'm building up the steam chest/valve/cylinder assy out of cast iron. Cylinders are 2.75" OD, and will be silver soldered into the steam chest. I tried this first wi...
by rudd
Mon May 27, 2019 10:51 am
Forum: Live Steam
Topic: Conway C-16
Replies: 8
Views: 3228

Re: Conway C-16

If he's lost control of the domain hosting his webpage, which is what it looks like, not good, since the email addy is linked to the domain.
How about,
"Has anybody talked to Paul Lavacot lately?"
by rudd
Fri May 24, 2019 7:15 pm
Forum: Live Steam
Topic: Conway C-16
Replies: 8
Views: 3228

Re: Conway C-16

Keep us posted if you hear form him. I was just at his web page, the link on the front page is a link to some high end housing (probably not in US) for sale, and there are other links for the same sort of stuff scattered through the site. It does not look promising. I've been wanting a gander at the...
by rudd
Sun May 12, 2019 10:55 am
Forum: Lathes
Topic: Jet GHB 1340 thread\ half nut issues - beginner
Replies: 20
Views: 2324

Re: Jet GHB 1340 thread\ half nut issues - beginner

OK, he is saying "lead screw OR feed rod". (OP: Feed rod is not used for threading. ) If both are causing issues, either both are bent, or the problem is further upstream in the gearing. Here's a real rough test to see if they are bent - run carriage all the way to one end or the other. stack up "st...
by rudd
Thu Apr 25, 2019 7:09 pm
Forum: General Discussion
Topic: Mounting an INVERTER
Replies: 12
Views: 2854

Re: Mounting an INVERTER

This chump understands heat transfer calculations. It depends on temperature *difference*, delta T. Deliberately raising the temperature of a heat sink or placing it in a warmer location is not sound practice. Rig up a remote control, the VFD for my mill lives in a wash-down box up on the wall. The ...