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Thanks John, it's certainly an interesting project. I had a long conversation with Hendeyman today about this and we agreed the error was likely that I simply didn't cut the teeth deep enough. After...

I thought I'd update this thread...
Using the information I found as a result of this thread, I made a test gear from aluminum.

310400

I sent it to the gentleman who owns the 1917 White who...

Welcome back Jim...

Joe P

Churchill was Minister of Munitions in the Lloyd George government at the time of the intervention. The British troops went to Murmansk and Archangel, largely for the same reasons the Americans and...

The US troops in Russia were armed with American-made M1891 Mosin-Nagant rifles in the Russian 7.62x54 caliber. Two American companies, Westinghouse New England and Remingon had made them for the...

The Trans-Siberia railroad had always been under quasi-military control since it was built (or finished) during the Russo-Japanese War. Some of the uniforms are military but others are the uniform of...

Is this the engine that is in the main front hall of the Science Museum in London? If so, I've looked at it several times. It's really quite amazing, especially when you consider that it was built...

The real gunboat was Spanish, built in Hong Kong for the Spanish Navy in the Philippines. There were several new gunboats there that were incorporated into the Navy after the war. It's unlikely that...

Not if it was made before January 1, 1898. There is also a list of exceptions which I think includes all the big double rifle calibers. I've seen the list but since I don't collect breech loaders I...

No. Any rifled breech loading arm with a bore larger than .50 is considered a "destructive device" and requires a Class III federal License to own. I'm not sure what the rule would be if it wasn't...

That's pretty slick but I no longer have the original gear to measure. I used one of those gear gauges to measure it - the little plates with the tooth profile for each size. It was clearly the best...

EUREKA! Now I get it!

Thanks again John...

I'm getting closer to understanding this but I still haven't come up with the same number John did. I think the problem is the sine of the 20-degree helix. I'm using this chart from the B&S book on...

Which it does.. it falls between 22.93 and 23.04

jp

I wish I did have it but that would require dismantling the engine it's on - and that is in Florida. The car is in remarkable unrestored condition - never having been apart since it was built. The...

Thanks John..I am beginning to understand how to do it.

jp

I have the B&S book and the Cincinnati book and I'm sure they explain what I should do but I'm having a difficult time understanding it...if I keep reading it over, sooner or later it will start to...

I would think there must be a formula... It's a DP8 gear, 20 teeth, helix angle 20 degrees. I confess to being a bit math challenged so I've probably found the answer already but simply don't...

I guess it depends on what you'd use it for but I have a flat belt Sidney of about the same size that I use every day. It has its limitations, of course, but for the work I do, on pre-WWI cars, it is...

You are asking good questions...and we all had to start somewhere.

Quite a lot of the historical part of this discussion will be new to most of the members of this forum. This may be the largest...

Me too. For the OP...lathes are measured by their swing, roughly the distance from the center of the spindle to the ways. That's about a 6" lathe. A 32" lathe is huge...

The Huntsman process made crucible steel. Many items were marked "cast steel" but this was reference to the process by which it was made, not to casting shapes. That doesn't come along until much...

Oddly enough I was reading the B&S "Practical Treatise on Gearing" last night and it mentioned both types of dividing head, not as one being for the heavy machine and another for the light machine...

I hadn't thought of that...I'll try it in any case. When I went through my reamer draw I found I have both 9 and 10 B&S reamers, both new. I'd forgotten I had them. They came from the grinding shop...

I found one...old, dirty and gummed up. I paid a little too much but it was close enough to go and pick it up which for a piece like this is important. Since I have the gears, I can make the pieces...