First cut from my 8520...what is this god awful noise coming from...

According to the Atlas MOLO, the optimum surface speed for milling is about 2/3 that of the optimum speed for turning.. This is probably for HSS cutters. Once the recommended SFM is known, the MOLO has a table that gives the RPM required with various size and type milling cutters to get a given surface speed. There are copies of a couple MOLO's in Downloads. The speed tables themselves are also there by themselves.
 
Something is still not right with this thing. I suspect the spindle bearings might need to be replaced. 1900 RPM...cuts are ok but it's making the loud noise again. Not as bad as before but significant. It also vibrates more than I think it should. Enough to loosen the knurled nut off of the top to the point where it almost flies off the drawbar. :mad:
 
Do the sharpie test. Colour in the whole taper and insert it til it will l just rotate in the spindle. Take it out and see what the contact pattern looks like.

Sent from my H3123 using Tapatalk
 
You must log in or register to reply here.
Back
Top