Search found 216 matches

by tetramachine
Thu Mar 16, 2023 12:10 pm
Forum: Live Steam
Topic: Derailments
Replies: 65
Views: 9491

Re: Derailments

After the toxic derailment in Ohio. A report was published that mention overheated bearing boxes. First report to train conducted was at 150 degrees, then 250, then 450. Then came the derailment. The article stated that above 400 the train was required to stop. Appears that was not done, or quickly....
by tetramachine
Sat Feb 25, 2023 9:21 pm
Forum: Riding Scale Railroading
Topic: Hydraulic control
Replies: 22
Views: 12881

Re: Hydraulic control

Adjustable flow control valve is the ticket. The best control is a variable flow hydraulic pump, motor.
The type used on zero pivot mowers. They a pump and motor in a single bolt onto the engine. You need to match the pump HP to the engine HP.

Not very expensive, 4-500. Made in China .
by tetramachine
Wed Feb 22, 2023 12:18 pm
Forum: Live Steam
Topic: Broken Taps
Replies: 21
Views: 4164

Re: Broken Taps

Second the ball end mill. If the tap protrudes at all above the surface, here's the way I have done a few times, 100% success. Take a piece of steel scrap, drill a hole thru the size of the tap, then drill a hole say 1/4 but not thru, leaving a shoulder at the bottom. Now mig weld the hole full. If ...
by tetramachine
Sun Feb 19, 2023 2:56 pm
Forum: Live Steam
Topic: Long shot does anyone recognize this motor?
Replies: 13
Views: 2300

Re: Long shot does anyone recognize this motor?

I have some Parker Hannifin servos, look exactly like yours. How many wires out of the motor? 2,4, 6 +
by tetramachine
Thu Feb 16, 2023 12:02 pm
Forum: Live Steam Marketplace
Topic: Live Steam Atlantic on ebay
Replies: 8
Views: 2639

Re: Live Steam Atlantic on ebay

Yeah, that steel looks old, and a bit crude. As it is past 2 g's and may need a boiler. The interest goes down quickly.

Looks nice but I am out of the bidding now.

Tom
by tetramachine
Sun Jan 01, 2023 3:11 pm
Forum: Sheet Metal Fabrication
Topic: Warpping sheet metal
Replies: 4
Views: 2824

Re: Wrapping sheet metal

L looking for ideas on how to best reducing the warping of the sheets.
by tetramachine
Sat Dec 31, 2022 4:11 pm
Forum: Sheet Metal Fabrication
Topic: Some Kind Of Press For Knocking Out Shapes In Aluminium
Replies: 11
Views: 8574

Re: Some Kind Of Press For Knocking Out Shapes In Aluminium

Do you have a milling machine, that would do that kind of work easy.
Or drill four corners, cut with nibbler, might do AL that thick. Or saw of your choice.
A 40 ton IRON WORKER, would do it but the dies would be $xxxx.00
by tetramachine
Sat Dec 31, 2022 3:50 pm
Forum: Live Steam
Topic: How To machine one piece axle box
Replies: 34
Views: 7616

Re: How To machine one piece axel box

Clamp it in a mill, bore one end. Then use an EXPANDING collet into that bore. They are made soft to be turned to the size needed. I made a collet tube just for these collets, that used a 3/4 threaded rod, fixed to the tube. A lot more force than a handwheel. You could also use a hex collet holder, ...
by tetramachine
Sat Dec 31, 2022 1:06 pm
Forum: Sheet Metal Fabrication
Topic: Warpping sheet metal
Replies: 4
Views: 2824

Warpping sheet metal

I am building a couple 1:12 scale Box cars. There is a trim piece the has a half dozen beads rolled into it. After rollimg the beads in the piece is cut to 3 x 10. With all sort of twists. As a test I went over a test piece with a propane torch. It did not do much to flatten it out. I have a heat tr...
by tetramachine
Sat Dec 24, 2022 12:47 pm
Forum: Live Steam
Topic: Is buying a part finished project worthwhile?
Replies: 27
Views: 7903

Re: Is buying a part finished project worthwhile?

I have purchased two projects, first was a very poorly built 1" Pacific unfinished. Came a new steel boiler, beautiful brass riveted tender 90% done, the loco was build by a person with a file, and bent ruler he couldn't read. Example, the wheels were loose on the axles, filled in with bondo, r...
by tetramachine
Sat Oct 29, 2022 6:46 pm
Forum: Live Steam
Topic: Brass, Bronze Piston valve clearance
Replies: 11
Views: 3335

Re: Brass, Bronze Piston valve clearance

The expansion of the piston, is offset by the expansion of the cylinder. So .003" expansion of the piston, is partly offset by expansion of the bore, .002 ÷/-.
by tetramachine
Sat Jul 09, 2022 11:13 am
Forum: Live Steam
Topic: Live steam locomotives
Replies: 11
Views: 7764

Re: Live steam locomotives

I had sent money in April, no drawings no response, in june filed with PayPal, for no delivery of order, last week PP refunded my money.