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Tool Bits

lathe_tools_std_shapes.jpg (28873 bytes)
Lathe tool standard shapes

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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.

More tool bits


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.   
Surface Feet/Minute (SFM) Chart 1      SFM 2      SFM 3

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Converting part size & RPM to surface feet per minute (SFM)