Roundover router bit question

[dml66]

I want to router a 1/8" roundover on the edges of several pieces of U-channel UHMW plastic extrusions. I've only ever used a roundover bit with a ball bearing guide which registers off one of the edge's surfaces. This material has an unusual property; the surface the ball bearing would ride on is slightly "lumpy", i.e, it's not perfectly flat. While the surface isn't perfectly flat, it is straight.

My thought is to remove the ball bearing guide from the roundover bit, then let the edge ride on the router table fence instead of the ball bearing. I've never tried this so I'm wondering if this is a safe procedure? I've made it this far with 10-digits, I'd like to see it stay that way .

Thank you.

 

[ChazzC]

Make sure the cutter rotation and feed direction are correct and use a pusher and you should be OK. It’s no different than using a profiling bit on a molder.

 

[tq60]

For best outcome, use best fixturing.

Your idea is spot on, but not quite finished.

Figure out how to attach this to a sled such that is cannot move and is in perfect spot relative to where cut needs to be.

Build sled to allow it to move through machine with fence riding on the sled.

Or, if you have a mill, use that.

Sent from my SM-G781V using Tapatalk

 

[Eddyde]

Yes, its totally doable , I have done it many times. You don't really need to take the bearing off, just make the OD of the bearing flush with or a few thou shy of the face of the fence.

 

[dml66]

Thanks guys, the pieces turned out perfect .

 

[DAT510]

If you have a mill, you can use it vs with a router. I've done it a number of times... Mounting a router bit in my mill to round over the edge on a piece of aluminum.