Search found 1477 matches

by John Hasler
Thu Jun 25, 2020 8:18 am
Forum: Live Steam
Topic: Future of Superscale Locomotive
Replies: 50
Views: 28464

Re: Future of Superscale Locomotive

Whenever I see "Superscale Locomotive" I visualize a Yellowstone built 4:1 instead of 1:4.
by John Hasler
Fri Jun 19, 2020 8:34 pm
Forum: General Discussion
Topic: Mystery Metal
Replies: 15
Views: 940

Re: Mistery Metal

Thermite is an iron powder which reacts when potassium permaganate and a piece of magnesium ribbon is activated with glycerine. I've done this to weld some steel together; very hot. Don't try it at home. Thermite is usually a mixture of iron oxide and aluminum. https://en.wikipedia.org/wiki/Thermite
by John Hasler
Fri Jun 19, 2020 8:29 pm
Forum: General Discussion
Topic: Mystery Metal
Replies: 15
Views: 940

Re: Mistery Metal

The specific gravity of prepared (alloyed) magnesium will vary from the pure element. The description provided indicates to me that it is, indeed, magnesium. Unlike most aluminum alloys, it's "crunchy" when machined. You haven't lived until you've witnessed a magnesium fire. The dazzling white flam...
by John Hasler
Thu Jun 18, 2020 8:07 am
Forum: Live Steam
Topic: Needle bearings, on axles.
Replies: 13
Views: 1028

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) That would create a stress concentration at the step where the pin goes into the axle. The pin diameter would need to be large enoug...
by John Hasler
Tue Jun 16, 2020 5:56 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: CMM chassis for great DIY cnc build: $300
Replies: 5
Views: 449

Re: CMM chassis for great DIY cnc build: $300

Be one heck of a 3d printer too. I’m a terrible salesman, but I gotta believe it’d be overkill for 3D printing. So what? Nothing wrong with a bit of overkill. At $300 it's probably the cheapest way by far to get that combination of working volume, stability, and accuracy. It could also double as a ...
by John Hasler
Mon Jun 15, 2020 12:41 pm
Forum: Lathes
Topic: Lathe wiring
Replies: 8
Views: 520

Re: Lathe wiring

The switch will work with 220. You wire it the same as with 120 but using L1 and L2 instead of line and neutral. You don't connect up the neutral at all (but connect the ground, of course).
by John Hasler
Sat Jun 13, 2020 7:32 pm
Forum: General Discussion
Topic: Best endmill for slotting Stainless.
Replies: 7
Views: 655

Re: Best endmill for slotting Stainless.

I've used plain keyway cutters in my vertical mill with no trouble.
by John Hasler
Thu Jun 11, 2020 10:45 am
Forum: General Discussion
Topic: Before you do anything, you must do something else first...
Replies: 23
Views: 1282

Re: Before you do anything, you must do something else first...

liveaboard writes:
> I ran PEX tube underground too, for domestic water and compressed air.

Domestic compressed air? Do you outlets just in the kitchen and bathroom, or throughout the house?
by John Hasler
Thu Jun 11, 2020 10:37 am
Forum: Lathes
Topic: Lubrication For Lathe Headstock
Replies: 19
Views: 5330

Re: Lubrication For Lathe Headstock

SAE 5 would be closer to the viscosity of MMO.
by John Hasler
Wed Jun 10, 2020 6:57 pm
Forum: Lathes
Topic: Lubrication For Lathe Headstock
Replies: 19
Views: 5330

Re: Lubrication For Lathe Headstock

Detergents don't suspend wear particles, just combustion products. I don't think that they will do anything at all positive or negative in a gearbox. I agree that MMO is a wierd choice, though. There must be a light gearbox oil with an EP additive out there.