Search found 662 matches

by rudd
Wed Jun 17, 2020 8:03 pm
Forum: General Discussion
Topic: Strange zerk fitting on MSC milling machine
Replies: 8
Views: 1442

Re: Strange zerk fitting on MSC milling machine

NP317 wrote:
Tue Jun 16, 2020 10:12 am
Unscrew the Zerk fitting and stick in a wire or wooden Q-Tip end to see what comes out upon removal.
RussN
I've done a bit of that getting grease out of oil passages... just sayin.
Tiny little drilled holes in a casting. They had to open it to pack it with grease.
by rudd
Wed Jun 17, 2020 7:58 pm
Forum: Live Steam
Topic: Needle bearings, on axles.
Replies: 14
Views: 2616

Re: Needle bearings, on axles.

On the bearing races, rather than sleeves on the axle, how about boring the end of the axle and pressing in purchased hardened dowel pins? (axle is shorter of course)
by rudd
Tue May 12, 2020 8:48 pm
Forum: The Junk Drawer
Topic: Yellow Jackets
Replies: 5
Views: 1689

Re: Yellow Jackets

Haven't had that happen, and I'm glad! I know one thing that is worse......a scorpion in your boot. One of those little translucent ones. Double :shock: Glad to hear some one else has experienced this. I wasn't sure if I had stuck my foot in boiling water or an electric socket. Mine was one of the ...
by rudd
Thu May 07, 2020 8:39 pm
Forum: Live Steam
Topic: weed killer
Replies: 23
Views: 3888

Re: weed killer

Are those weed potions prototypical?
This looks like a bunch more fun.
weedburner.JPG
by rudd
Sun Mar 15, 2020 10:38 am
Forum: Live Steam
Topic: OCME Club Suspends Public events
Replies: 29
Views: 7196

Re: OCME Club Suspends Public events

Thank you Harold. I am "only" 61 but I am running on 3/4 of a set of lungs.
by rudd
Sun Mar 01, 2020 12:35 pm
Forum: Live Steam
Topic: Slide Valve Cylinder Castings
Replies: 17
Views: 4916

Re: Slide Valve Cylinder Castings

ChipsAhoy wrote:
Sat Feb 29, 2020 6:47 pm
I have plates made for my, yet unfinished engine, because of an error I did while machining. ......
Scotty
How did you secure the false seats to the castings?
by rudd
Thu Feb 06, 2020 6:57 pm
Forum: Live Steam
Topic: Necessity of hardened crank pins on 3/4” scale
Replies: 49
Views: 11989

Re: Necessity of hardened crank pins on 3/4” scale

What you should take away from this is that it is NOT a tolerance issue. It is an engineering issue, one of not choosing a size that will provide the necessary clearance to compensate for the undulation of the engine as it moves along a not so perfect track. H Which is exactly what I intended to co...
by rudd
Tue Feb 04, 2020 8:37 pm
Forum: Live Steam
Topic: Necessity of hardened crank pins on 3/4” scale
Replies: 49
Views: 11989

Re: Necessity of hardened crank pins on 3/4” scale

I don't think this is the correct takeaway. It seems you are mixing up clearance with tolerance. They are not the same. I'm surprised others have not chimed in here, as this has been covered here on Chaski before. OK, I'm not sure what you think I don't understand here. Tolerance in my shop is the ...
by rudd
Mon Feb 03, 2020 8:21 pm
Forum: Live Steam
Topic: steam/exhaust port sizing
Replies: 4
Views: 1968

Re: steam/exhaust port sizing

Yes, that is what I have. Did not know where it came from though. This is for a smaller 7 1/2" gauge loke, cylinders and saddle are grey cast iron. Say larger than a Fitchburg but smaller than a standard Mogul. They'll be silver soldered together. The port areas I have in the drawings now proportion...
by rudd
Mon Feb 03, 2020 6:51 pm
Forum: Live Steam
Topic: Necessity of hardened crank pins on 3/4” scale
Replies: 49
Views: 11989

Re: Necessity of hardened crank pins on 3/4” scale

Good advice. I learned this from my first mentor, the chief inspector for an aerospace tool & die works. He built his first locomotive to "plant" tolerances and it wouldn't run. As soon a one end of a part heated up and the other end of it didn't, things locked up solid. Relieving almost every slid...
by rudd
Sun Feb 02, 2020 8:35 pm
Forum: Live Steam
Topic: steam/exhaust port sizing
Replies: 4
Views: 1968

steam/exhaust port sizing

I've been reading the RRSC "engineering manual" and also some old steam engine design books based on full scale practice. RRSC manual states ports should be at least .4 * diameter of cylinder long, then backs into width. The .4 factor is based on making cores that will stay during a pour. Writer end...
by rudd
Fri Jan 24, 2020 9:37 pm
Forum: General Discussion
Topic: Removing End Of Broken Pipe From Pressure Pot Manifold
Replies: 28
Views: 4302

Re: Removing End Of Broken Pipe From Pressure Pot Manifold

Looks like there is a little bit of pipe proud of the female part. Hacksaw blade to top of threads, take a punch and collapse the pipe. If you can get it started collapsing, you've got it.