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“Macherys HandBook” has all the data you need. I think the book may be available online. Dick

Samd as a keyway.. My self a motor driven would nice. The could use internal gear making. About stroke you need a max of ?"? would do most hobby work and keep thd hp of motor down. Dave

The depth I can calculate but I don't know how much clearance I should use for the width of the slot.

You can speed up the process by fitting a scrap plug in the bore & drilling a slightly smaller than desired key size hole, centered at the plug/bore intersection. Despite having a pretty comprehensive

Here is a YouTube of using a lathe to make an internal keyway. https://www.youtube.com/watch?v=8FafBDB0fUk You just use the carriage as the "reciprocating ram" that would be on a shaper. I've never

Someone explained that you can easily do it on the minilathe by using it as a shaper. So why go on about buying gadgets (let alone gadgets that cost $160!) We all have minilathes, so I suggest you

When I cutting cast iron I use lathe and cut outside. The photo is casting in class 45? cast iron. It is a harder cast iron than most. FYI The first photo is finished part. The second photo same

I have made about three of these guides and they worked. So I believe that makes me a psuedo-beginner-expert by you-tube standards. :) The slot for the broach needs to be cut such that the portion

Yes, an angle grinder is a great idea. (I think I've actually done it that way before, but I forgot to mention it!) There are two real problems with using barbell plates. The skin is the worst one.

The set you show is $160 and does not include a 4mm broach. I bought the 3mm and 4mm broaches for $30. I need to make the one guide since there is no 28mm guide for a 4mm broach. I have the guide

Here you go Johannes. https://listado.mercadolibre.com.mx/torno-para-metales#D[A:torno%20para%20metales]

Thanks Mario and the rest of your boys. I found in map this Lapaloma Metal not so far away from me. Let see they sell seizes shorter than 3 meters. Brass and aluminum is for the moment most

there's several of these on youtube https://www.youtube.com/watch?v=BmOyQsH-EUk animal

Here lower cost set in metric.

I am putting a 4mm keyway in a 28mm bore. I do not think buying one is an option.

When I use barbell weights, I clamp one to a sawhorse (outside) & use an angle grinder to remove the skin before putting it on the lathe. Roy

Hello, Paul! There is an easy method of cutting internal keyways that does not require a broach. Have you considered using your lathe as an internal shaper? All it requires is a boring bar smaller

"If you don't mind mediocre material, exercise weight plates can give some cast iron slugs." You can get a lot of good metal from people throwing out barbell equipment (usually after the person in the

Mexico, San Miguel de Allende, so nowhere close. Look for "Metales la Paloma" for alum & brass. They do have minimums but not outrageous. https://www.lapaloma.com.mx/lapaloma_metales/index.html

Back 1960's there a magazine where guy made his own bar stock for plumbing parts It was a basic mold out of earth about 8" long I think. He had good brass bar stock to use. Dave