I've replaced an insert or two over the years and never saw any machinist check inserts for equal height or alignment. The pocket of a decent quality face mill will completely enclose the insert & the screw or clamp will assure that alignment is the same every time.
Good choice :)
Good choice :)
The high shear face mill takes very little power compared to a tool that has the insert in a less positive (or neutral) inclination. Really quiet as well. There is one disadvantage - the 45° side wall may not work in every situation.
That's the Glacern FM90A. Every manufacturer makes their own variation of this design. These are 90° tools with neutral or slightly positive rake that use AP** inserts. At 3" diameter this one is a bit large for a R8 mill but gives you an idea what others look like: from eBay listing.
As long as the size is under 3" it should work well. The limiting factor is not motor hp but rather it is the small physical contact area of the R8 taper. When Bridgeport invented the R8 taper they never envisioned higher horsepower motors & large material removal rates. Every machine that has the R8 taper has this limitation - whether it weighs 1500kg or 300kg. Face mills over 3" (76.2mm) should be run in a minimum 30 taper machine & 40 taper is better yet. Huge face mills run best on a 50 taper machine that weighs 10,000kg or more.
