Search found 399 matches

by rrnut-2
Thu Aug 30, 2018 10:20 am
Forum: Casting & Foundry Work
Topic: Induction heating/furnace
Replies: 14
Views: 559

Re: Induction heating/furnace

"Is a protective layer of sand, or other insulating media, used on the floor, Jim, or do they simply work directly on the concrete?" They simply work on the concrete, no sand involved. What we did do, was to install a 24"x24"x4" fire brick right under the pour spout of the furnace. This way any "oop...
by rrnut-2
Wed Aug 29, 2018 9:22 am
Forum: Casting & Foundry Work
Topic: Induction heating/furnace
Replies: 14
Views: 559

Re: Induction heating/furnace

Our shop uses a "foundry mix concrete", it has a lot more rock in it than normal. Even with everyday use, it still has to be replaced every five years.

Jim B
by rrnut-2
Mon Aug 27, 2018 3:46 pm
Forum: Casting & Foundry Work
Topic: Induction heating/furnace
Replies: 14
Views: 559

Re: Induction heating/furnace

You're quite welcome Harold.

Jim B
by rrnut-2
Mon Aug 27, 2018 2:08 pm
Forum: Casting & Foundry Work
Topic: Induction heating/furnace
Replies: 14
Views: 559

Re: Induction heating/furnace

Generally speaking, the smaller the furnace, the higher the frequency. We have one furnace that burns 1 gram samples: it runs at 30kHz. The 100lb furnaces run at 3kHz, 5000lb furnace at 500Hz. Lead/Lag is accomplished by switching in/out capacitors. Since the late '60's, the units that I am familiar...
by rrnut-2
Fri Aug 24, 2018 2:26 pm
Forum: Riding Scale Railroading
Topic: Small Diesel engines for motive power
Replies: 26
Views: 1521

Re: Small Diesel engines for motive power

I have a Yanmar diesel generator, single cylinder, and it is fairly loud. I would think that a person could get a much quieter gas engine to use in a locomotive.

Jim B
by rrnut-2
Tue Aug 07, 2018 4:23 pm
Forum: Riding Scale Railroading
Topic: Titan Trains Titan Jr electric
Replies: 15
Views: 1227

Re: Titan Trains Titan Jr electric

If you are going to go with Honda, the 5 HP is available with 2:1 reduction which puts the output shaft back into the center. I have had good luck with this combination with the switcher that I built 25 years ago. Just a thought.

Jim B
by rrnut-2
Mon Jul 09, 2018 9:23 am
Forum: Lathes
Topic: Anyone need a chuck?
Replies: 8
Views: 911

Re: Anyone need a chuck?

Not my wife, she can spend hours at HGR and money!

Jim B
by rrnut-2
Sun Jul 08, 2018 9:28 am
Forum: Live Steam
Topic: the Hunchbacks of MLS (and others)
Replies: 9
Views: 1029

Re: the Hunchbacks of MLS (and others)

Never fear, Howard was dozing at the vendors table at Train Mountain!

Jim B
by rrnut-2
Sun Jul 08, 2018 9:20 am
Forum: Welding
Topic: TIG Welder - Everlast
Replies: 36
Views: 3561

Re: TIG Welder - Everlast

A Miller Syncrowave 200 is a bargain at $1500. I bought a new 250 Syncrowave a couple of years ago, and don't regret it at all. I couldn't find any used ones around here that weren't trashed.

Jim B
by rrnut-2
Fri Jun 15, 2018 1:00 pm
Forum: Live Steam
Topic: Shay Locomotives at Train Mountain
Replies: 4
Views: 1800

Re: Shay Locomotives at Train Mountain

Hi Ken

I need 4 brake shoes for the Shay. I will be at TM and will look you up.

Jim B
by rrnut-2
Fri Jun 15, 2018 12:57 pm
Forum: Live Steam Marketplace
Topic: Wanted electronic heavy Mikado drawings
Replies: 1
Views: 750

Re: Wanted electronic heavy Mikado drawings

PM sent.

Jim B
by rrnut-2
Thu Jun 14, 2018 8:33 am
Forum: Live Steam
Topic: Advice on the heavy mikado
Replies: 10
Views: 1469

Re: Advice on the heavy mikado

Railroad Supply has the castings and prints for the USRA Mikado. Call Mike after 6pm Eastern Time.
Also, RRSC does have a web site, and there is a pdf catalog that you can download. "Mikadoguy" is Mike's oldest son and has been doing a lot of the
website, catalog, contact him on this board.

Jim B