Search found 171 matches

by tetramachine
Fri May 14, 2021 6:30 pm
Forum: Live Steam
Topic: Ratchet wheel
Replies: 18
Views: 5357

Re: Ratchet wheel

When you are buying metals for small parts like the Ratchet wheel, just buy the easiest material for the job. As already stated A-1, W-2, D-2, all can be heat treated directly, no case hardening needed. Heat it cherry/orange, set it aside to cool to 150 +, then temper at a straw color, set it aside,...
by tetramachine
Fri Apr 02, 2021 11:25 am
Forum: Live Steam
Topic: Making 6-32 threaded Rod
Replies: 17
Views: 5211

Re: Making 6-32 threaded Rod

I often hear the 5-40 vs 6-32 pitch story, it mostly BS. A 32 pitch thread is double depth .047", a 40 pitch is .037 double depth. A #5 rod is .125" - .037= .088 minor dia. a #6 rod is .138" - .047= .091" minor Dia. .003 is not much, but disproves the story of more strength with a 5-40 size. I make ...
by tetramachine
Sat Jan 16, 2021 5:13 pm
Forum: Live Steam Marketplace
Topic: 1" scale steam dome. Turret
Replies: 15
Views: 7900

Re: 1" scale steam dome. Turret

I have found a foundry now, working on the patterns cost. Looking at having ten sets made.
by tetramachine
Thu Jan 07, 2021 8:17 pm
Forum: Live Steam
Topic: Could I get help picking a set of reamers?
Replies: 47
Views: 13781

Re: Could I get help picking a set of reamers?

For small sizes I use a groove gage, .200 to 1.200 other to 1.00, on the same gage, also have 3 point expanding bore gage starting at 3/16. Lastly ball gages, like the telescoping gauges, but with a split ball.
by tetramachine
Wed Jan 06, 2021 12:46 pm
Forum: Live Steam
Topic: Could I get help picking a set of reamers?
Replies: 47
Views: 13781

Re: Could I get help picking a set of reamers?

I bought a set over over/under from 1/8 to 1/2. Chinese, work well for last 15 years. Larger sizes ebay a name brand, Morse, Regal, others. When making drivers use reamers for the bores. and on size. You need to have a .625 hole to accept a 5/8 guide when broaching the keyways, a .6235 hole will not...
by tetramachine
Sun Jan 03, 2021 8:42 pm
Forum: Live Steam Marketplace
Topic: Eaton 6 Hydrostatic transmission $50
Replies: 4
Views: 2940

Re: Eaton 6 Hydrostatic transmission $50

I have worked on these Eaton units, fairly simple disassembly/assembly. BUT except for seals there is zero parts available. Some internal parts like the levers can be made, the pistons are just steel bearing balls. And while supposedly fitted to each bore, after a year of use they fit any bore. If r...
by tetramachine
Fri Jan 01, 2021 12:45 pm
Forum: Live Steam
Topic: Could I get tips on dumpster diving for materials for your build?
Replies: 52
Views: 16441

Re: Could I get tips on dumpster diving for materials for your build?

I have bought a lot of material from ebay. Drops, odd stuff and "stated known" alloy. Although it is often mystery metal, and fails to machine as well as its supposed alloy. Second choice is a company called Yarde Metal in CT, and NY. They have an online site that has a "drop zone" From them the all...
by tetramachine
Sat Nov 28, 2020 11:47 am
Forum: Live Steam
Topic: Exposed needle-bearings on inside of axle boxes
Replies: 26
Views: 9690

Re: Exposed needle-bearings on inside of axle boxes

I have two LE Pacifics. both have needle bearings running on HARDENED Races pressed onto the axle. One of the loco's Had worn out the bushings on each of the driving rods, the needle bearimgs were in fine shape except one which got rust from sitting a long time like 20 years. There are not seals on ...
by tetramachine
Fri Nov 27, 2020 3:12 pm
Forum: Live Steam
Topic: What do you think of this build video? Did he take a big risk?
Replies: 25
Views: 10528

Re: What do you think of this build video? Did he take a big risk?

The type of tap where the chips come out the top of the tap is called a "spiral Flute Tap". Very useful for deep holes, blind holes. There are forming taps, which deform the metal into threads. Fast like the spiral taps but NO chips, Great for blind holes, PITA materials like SS, use a forming tap.
by tetramachine
Thu Oct 29, 2020 8:52 pm
Forum: Live Steam
Topic: Pacific turn radius
Replies: 9
Views: 4781

Re: Pacific turn radius

My track is gauged about the same. The front truck was removed, and the lower edges of the links as well as the center post was killed to provide an additional 1/8 movement L & R. I then layed out a section of straight leading into a 10' section of 20 radius track. First pushed, then run on air, for...
by tetramachine
Wed Oct 28, 2020 10:08 am
Forum: Request For Services
Topic: Need mill work for academic research project in NJ
Replies: 13
Views: 16243

Re: Need mill work for academic research project in NJ

Its been two years since I built the Dice launcher. The Grad students had completed around 4000 dice toss's. That was July 2018. The next year a draft of results came out. Not surprising, the test showed what most everyone would have guessed. No matter how consistent the toss of the die is, once it ...
by tetramachine
Sat Oct 17, 2020 6:56 pm
Forum: Live Steam
Topic: Putting some grip (stippling) on an aluminium drive pulley.
Replies: 10
Views: 4815

Re: Putting some grip (stippling) on an aluminium drive pulley.

If it's a flat belt. I just would run a knurling tool across at face of it.
If a vee belt I would increase the size of both pulleys, to keep the ratio.