Leather burnisher, blueprints anyone?

[Mocivnik]

I need a motor operated burnisher, but now I have a "problem" with discovering the design.

 

I know I can draw and turn one by myself, but does anyone has any blueprints already? I need something for standard sizes, from 2mm up to 15mm (knife sheaths, mostly).

 

I'm talking something simmilar to this:

[JLSleather]

Blueprint only necessary if you are mass-producing something.  Stick a piece of wood in a drill chuck, and make some grooves with a gouge or file, sand it right in place.  Obviously, for mounting on a bench or pedestal grinder, you'll need an internal thread to suit the arbor.

[JKHelms]

I bought one of the replacement burnishers from Tandy for 30 something dollars and bored it out 8n the lathe and threaded the end to fit arbor on my HF buffer. Works like a charm. 

 

[JLSleather]

Just a thought out loud here .... you guys know that you can buy 1 1/4 - 1 3/8" diameter oak dowels for a few bucks, right?  Building materials stores (menards, lowes, etc) call them closet rods. 

Edited September 11, 2018 by JLSleather

[Mocivnik]

@JLSleather Totally agree on that. But the thing is, if I get any of blueprint of the existing one, it might have details, which I wouldn't be aware of while turning my own. That's the only point.

PS: Is there any required cutting speed for leather? (Calculated as circumference of the burnisher x turns per second?) Because I'm really struggling, what speed should I use. I can't find any numbers anywhere. But just "something" isn't something, I'd like to deal with. I might have too much or not enough and the edges won't be as they should.

@JKHelms: 30$ for a single piece of wood, turned on a CNC lathe is about 20 times too much. I'm just not paying that much for it (not because I couldn't afford that).

@JLSleather: Yeah, that's exactly what I got. I have 45mm (around 1 3/4 inches) of beech, lenght of about 40cm (about 15 inches). I'll just turn it out from this, but about 100mm (4 inches) long only.

[JLSleather]

Don't know the "cutting speed", but I've seen ppl on this forum going on about a 2" diameter burnisher running at 3600 rpm, which I have always thought was WAY too fast.

I get very nice edges running a stick less than 1"diameter (effective dia. down in the groove closer to 1/2" / 13mm) in a drill press at about 500 rpm.  Honestly, I think some people just like to have more tools, necessary or not.

If you understand "cutting speed", you likely don't have any trouble making your own "blueprint".

Edited September 11, 2018 by JLSleather

[Mocivnik]

@JLSleather: calculated for you, it's about 333mm/s cutting speed, which is around 33cm or 13inches.

 

More tools than need? Who do you mean this goes to?

For me, I want to have all the tools, I need most often and some, which I use seldomly. For example, I want to have better (more expensive) tools for rivets, which are most common in my workshop, but I don't care if I have chinese tools for rivets, which I use seldomly.

[Mocivnik]

@JLSleather: Hah I did drawing in autocad of my own before I started this topic and here it is.

 

 

[RockyAussie]

Just wondering as I do at times ....if the convex bullet shape end would be better off concave to get inside those little tight areas? Nice looking picture there anyway.

[JLSleather]

AutoCad? So that would be a revolved surface then?