Machining Aluminium with end mills.

[Benchwayze]

Hi folks.

I want to make a false top for my bandsaw out of 10mm aluminium sheet.
I shall need to machine a channel for the mitre guide, of 1/2" width x 3/16" depth.
I have a suitable end mill that I can put in my half-inch router.
What I need is the safe working speed to cut this channel in the aluminium.

Thanks in anticipation.
John

 

[CHJ]

Should find the figures here

Use plenty of paraffin as lubricant to prevent cutter picking up crud.

 

[Spindle]

Hi

A carbide end mill will be more suitable for use in a router as it functions at a higher speed than normal HSS - more in keeping with the speed range of a router

http://www.endmill.com/pages/training/S ... Drills.pdf

A 1/2" diameter carbide cutter should be used at 4500 - 9000 RPM

A 1/2" diameter HSS cutter should be used at 1261 RPM

Regards Mick

 

[jasonB]

You will get a more accurate slot with a 2-flute slot drill rather than an end mill which tend to cut oversize in this situation. Failing that use a smaller cutter and work upto the width.

It will also clear the chips better at higher revs

 

[Benchwayze]

Thanks folks. I am much obliged. I've noted all suggestions/advice, and I will take it from there.

If things get a bit 'leary', then I could finish up using MDF and Tufnol!

Thanks again.
John