There are 3/8" collets for woodworking routers but they are not common
(might be hard to find and might not be cheap).
There are variable speed routers or controllers you'd plug the router in to
that can vary the speed. But it seems like even a cheap router would be
over-kill for the task. Why not set up a variable speed drill motor or a
drill press with a table/guide for the leather?
----- Original Message -----
From: "Steve Hammatt, Mount Vernon WA USA" <email@example.com>
To: "Shop Talk" <firstname.lastname@example.org>
Sent: Monday, May 27, 2013 8:03 PM
Subject: [Shop-talk] Somebody will know......
> Ibm looking to use an inexpensive router and table for
> an ongoing project. I need to burnish leather using a
> rotary burnishing tool.
> Here are my questions:
> 1. My burnishing tool is mounted on a 3/8b diameter
> shank (most router tools are 1/4b or 1/2b). Ibm pretty
> sure reducing collars are available.
> 2. My maximum rotary speed will be in the 1000 to
> 1100 rpm range. Much slower than a typical router.