Recent content by Mainer

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You ARE turning the rod down to 0.125" before you thread it 5-44. aren't you? I'm a bit confused by the drawing, as it looks as though the thread is spec'd at 6-32. Am I missing something?

You also need to scale time. Do this by considering the period of a pendulum. If a model is, say, 1/8 scale, time should pass about 2.8 times faster. Or, to put it another way, if your engine is 1/8 scale, 950 rpm represents a full-scale speed of about 340 rpm.

Cold-rolled steel?

Needless to say, try to make sure they are difficult to walk off with. Screwed down, in locked display cases, etc.

I've been meaning to make something like that...for years. Thanks for the nudge to get going and actually make it!

This place https://www.jimorrisco.com/ sells top-quality small washers in s/s or brass, as well as small pattern (i.e. proper scale( nuts and bolts....but their largest size is #2. For washers, that translates to an o.d. of 3/16" (0.1875") and an i.d. of 0.089".

Oxy-acetylene is actually too hot. It's very easy to melt the copper and put a hole right through the boiler. A rosebud tip in the hands of an expert can be very effective, but for those of us in home shops it's probably not the best choice for silver brazing. A large propane torch (what a...

I suspect you will never need plate 3 and will probably never need plate 2. Make one or the other, if and when.

The larger black handle is indeed a spindle lock. It tightens a split cotter and even mild tightening is enough to lock it up like the hinges of hell. The smaller handle lets you adjust the position of the direct indexing pin. The pin can slide forward or backward just over 1 hole spacing, or it...

I made my dividing head out of a South Bend 10K headstock so the spindle nose and collets match my lathe...very handy. I used a 60:1 gear ratio because, if you figure out the index plates, you can get by with drilling slightly fewer index plate holes for a 60:1 ratio vs. a 40:1 ratio. In...

That's why the Babylonian number system was based on 60! That's why I used a 60-tooth gear in my homemade dividing head. You won't achieve a lot of rigidity in an auxilliary spindle, the best you can do. You might pick up a copy of "The Amateur's Lathe" By L.H.Sparey. I think he discusses such...

I'm glad it worked so well for you. When I tried machining titanium, the main thing I noticed was that the machining process generated a LOT of heat. Coolant seemed to be a requirement. That may have saved me from johnny1320's experience. It did machine pretty well otherwise though, but...

I thought the OP said an arc was not what he was looking for. Or did he just not know how to draw an arc through 3 arbitrary points?

I think you want a spline. Look up spline in the help and see if that will do what you want.