Corner Rounding Endmills are Expensive

[MrWhoopee]

and they're HSS. Round-over carbide router bits with 1/2" shanks are cheap.

6 Bit Round Over Edge Forming Router Bit Set 1/2" Shank Woodworking Tool | eBay

Specification: Type: Coner Round Over Edging Router Bit Material: Tungsten Carbide Shank: 1/2''(12.7mm) Radius: R1/8''(3.175mm) R3/16''(4.76mm) R1/4''(6.35mm) R3/8''(9.52mm) R5/16''(7.96mm) R1/2''(12.7mm) Package Including: 6pcs Corner Round Over Router Bits.

www.ebay.com

and effective.

 

[Tom Kitta]

Well, sort of expensive - if you get US made and new. Used not so much & you can get carbide as well.

For AL, if you have router bits around the wood stuff works. For most things AL (in soft grades) can be treated as a gummy hard wood.

 

[mmcmdl]

Funny this was mentioned . These showed up last week , but I'll hold onto the CR endmills just in case .

 

[YotaBota]

Nice, I've been wondering about using the wood bits on steel.
What rpm and doc are you using?

 

[MrWhoopee]

Nice, I've been wondering about using the wood bits on steel.
What rpm and doc are you using?

I was running about 600 rpm and full depth in one pass (square corner to full radius).

 

[ChazzC]

The nicest thing about using router bits is that you don’t need to calculate (guess) about the X-Y location of the but: the bearing takes care of that.

 

[MrWhoopee]

The nicest thing about using router bits is that you don’t need to calculate (guess) about the X-Y location of the but: the bearing takes care of that.

Yep, I took the bearing off, but all of the bits are exactly 1/2" diameter at the inside of the radius. Makes positioning easy.

 

[Jswain]

and they're HSS. Round-over carbide router bits with 1/2" shanks are cheap.

6 Bit Round Over Edge Forming Router Bit Set 1/2" Shank Woodworking Tool | eBay

Specification: Type: Coner Round Over Edging Router Bit Material: Tungsten Carbide Shank: 1/2''(12.7mm) Radius: R1/8''(3.175mm) R3/16''(4.76mm) R1/4''(6.35mm) R3/8''(9.52mm) R5/16''(7.96mm) R1/2''(12.7mm) Package Including: 6pcs Corner Round Over Router Bits.

www.ebay.com

and effective.

That's awesome, I have a big crappy tire master pack in the garage hmmm...

 

[MrWhoopee]

That's awesome, I have a big crappy tire master pack in the garage hmmm...

I haven't tried them with 1/4" shanks, but you've nothing to lose.