Tool Bits
Lathe tool standard shapes
Single point lathe tool angles
Left-hand (HSS & brazed carbide), straight
(carbide), threading (carbide), right-hand (carbide & HSS), blank (HSS).
The straight tool bit works well with the fly cutter on the mill as do the round nose & left-hand bits.
Small cut-off,
45º chamfer, round-nose & two views of an small boring
bar.
The chamfer tool can chatter. Better to use the compound.
More tool bits
Left-hand & right-hand ¼"
tool bits with carbide inserts.
Inserts (top & bottom), 2.2mm retention screw & metric star wrench
Carbide insert tool bits in ¼" & ½" shanks.
Carbide insert tools bit
holders (negative 5° rake), from
Dorian Tools (USA) left to right:
MTGNR,
MTJNR,
MTCNN (negative 10° rake),
MTJNL,
MTGNL.
They use TNMG-style, inserts which have six usable tips, each.
Approximate cutting speeds
for different materials.
Converting part size & RPM
to surface feet per minute (SFM)