316 Grade Stainless Steel

[TrevorW]

Tried cutting on a lathe

hardly touched it

anyone know best method for machining

cutting tools/rpm etc

[Hagar (Doug)]

send a pm to steve aka kinetic, he should be able to help with this one.

[koputai (Jason)]

I try to avoid using 316 (difficult when you build devices for underwater use!), but when I have to, I keep the machining to the minimum possible, and pay a machine shop tons of money to do it!

Sorry, not much help, but 316 is a PITA.

Cheers,
Jason.

[sheeny (Al)]

I'm out of touch with machining, but I got this:

Machinability
316 stainless steel has good machinability.
Machining can be enhanced using the
following rules:
􀂋 Cutting edges must be kept sharp. Dull
edges cause excess work hardening.
􀂋 Cuts should be light but deep enough to
prevent work hardening by riding on the
surface of the material.
􀂋 Chip breakers should be employed to
assist in ensuring swarf remains clear of
the work
􀂋 Low thermal conductivity of austenitic
alloys results in heat concentrating at
the cutting edges. This means coolants
and lubricants are necessary and must
be used in large quantities.

from here:
http://www.aalco.co.uk/technical/datasheets/Aalco_Datasheet_St_St_316.pdf

Al.

[GrahamL]

316 is a PITA.

My old mans a retired Marine engineer and more than once has made a similar comment.. is there a reason you have to use 316.. instead of brass or aluminium ?

[TrevorW]

Weight it's for the counter weight shaft

something as heavy non corrosive and easier to machine will suffice

Cheers

[koputai (Jason)]

Originally Posted by nightstalker

My old mans a retired Marine engineer and more than once has made a similar comment.. is there a reason you have to use 316.. instead of brass or aluminium ?

Brass tarnishes, and aluminium corrodes, and both are very soft. I use aluminium for underwater housings, but I get it hard anodised, which changes the surface structure. Hard anodising as you would expect hardens the surface, and also renders it non-conductive to electricity. But, if you want something really hard, and really corrosion resistant, it's hard to go past a stainless such as 316.

Cheers,
Jason.

[GeoffW1 (Geoff)]

Hi,

You could try machining grade 303 or 304. Corrosion resistance is a little less, but may be still OK in a countershaft.

Ugima 303 is the bullant's pants:

http://www.atlasmetals.com.au/files/sections_ugima.pdf

Cheers

Cheers

[Louwai (Bryan)]

Off topic, sort of...... Well it is about machining.

I thought it was cool........

http://www.gaskrank.tv/tv/motorrad-fun/3...-10963.htm

[bojan]

I want this machine

Originally Posted by Louwai

Off topic, sort of...... Well it is about machining.

I thought it was cool........

http://www.gaskrank.tv/tv/motorrad-fun/3...-10963.htm

[DavidU (Dave)]

Me too ! That's an awesome machine.

Originally Posted by bojan

I want this machine