Measures to eliminate machining faults of end mill

Fault

Occurrence situation

Measures

The machined
surface is not good

The surface is smooth, but there
are concaves and convexes

●Reduce feed.

●If it is double-flute, change it to 4-flute.

Chips are short and thin,
but there are sticky chips.

● Increase cutting speed.

●Use wet or compressed air (increase flow)

●Make miniature rounding passivation treatment.

●Change from conventional milling to climb milling.

● Increase feed or cutting allowance.

There are cross cutting marks

●Make miniature rounding passivation treatment.

●Use non-water soluble cutting fluid.

●Change from climb milling to conventional milling

There are excess cutting
marks left.

●Reduce cutting allowance.

●Increase cutting speed.

●Reduce feed.

Profile precision
is not good.

The size of finish machining
is smaller.

● Change from conventional milling to climb milling.

●Reduce cutting allowance.

●Replace chuck or spring collet.

●Reduce overhanging volume of end mill.

●Increase cutting speed

Square trowel is not good.

●Reduce cutting allowance.

●Replace chuck or spring collet

●Reduce overhanging volume of end mill.

●Increase cutting speed.

●Change from double-flute to 4-flute.

●Reduce feed.

●Check wear, replace tools.

Vibrating

●Increase feed (reduce if more than 0.04mm/tooth)

●Try changing cutting speed.

●Replace chuck or spring collet.

●Reduce overhanging volume of end mill.

●Rough milling uses double-flute, finish milling uses 4-flute.

●Change from climb milling to conventional milling.