Scooterotica

davidblythe wrote:

sideout wrote:David

HSS tools are fine. Just make sure the rake angle suits the material being parted off.

Cheers,

Nigel

Hi Nigel

more detail here please,

cheers david

More detail (just repeating what Markd232 said really):
Aluminium Alloys required a steeper rake angle 10-20 degrees (the top surface of the cutting edge with respect to horizontal) than steel.
Also, the relief angle (the front surface of the cutting edge with respect to vertical) would be about 8-12 degrees.

Mark's comment about "front cutting edge is ground at an angle of 5 degrees and not square" is good advice too. It ensures the bit you are parting off comes away cleanly without any remedial work required.

Hope the above helps.

Nigel

Mark,

the fax were spot on and very useful, :bouncing:

sideout wrote:

davidblythe wrote:

sideout wrote:David

HSS tools are fine. Just make sure the rake angle suits the material being parted off.

Cheers,

Nigel

Hi Nigel

more detail here please,

cheers david

More detail (just repeating what Markd232 said really):
Aluminium Alloys required a steeper rake angle 10-20 degrees (the top surface of the cutting edge with respect to horizontal) than steel.
Also, the relief angle (the front surface of the cutting edge with respect to vertical) would be about 8-12 degrees.

Mark's comment about "front cutting edge is ground at an angle of 5 degrees and not square" is good advice too. It ensures the bit you are parting off comes away cleanly without any remedial work required.

Hope the above helps.

Nigel

Cheers Nigel,

starting to enjoy using the lathe now, working cleaner with the parting tool now

No problem Dave, hope you have some fun, nothing better than designing, manufacturing and then using a part you made yourself.