bastarddsm
Aluminum
- Joined
- Feb 18, 2014
- Location
- Southern Illinois University
Hi,
Does anyone know where I could find some 1-1/8 4340 or 300M rounds that are pre-heat treated to Rc42ish. What is the maximum hardness that can be machined with normal insert tooling?
I have a job to make a set of axle shafts that are splined on each end. Spline major dia is 1.0625, and minor is somewhere around 0.987", and 22" long. I don't have a ton of material to remove.
Any other material I could look at? I need 200ksi+ tensile, and I'd prefer to avoid sending it out for heat treat. I found ETD150 (not strong enough), and Flexor - M. Flexor-M looks ideal, but I can't seem to find it anywhere, and it sounds like it can be a pain, with it moving around during machining. I only need a couple of 2 foot bars at this point.
Also, I'm aware the splines should be involute and induction hardened to the the mid 50's... but, this is an extreme drag application that is not going to see any real mileage, uses old used outer CV's that are already worn, and this will likely break the bars I make in time anyway.
Does anyone know where I could find some 1-1/8 4340 or 300M rounds that are pre-heat treated to Rc42ish. What is the maximum hardness that can be machined with normal insert tooling?
I have a job to make a set of axle shafts that are splined on each end. Spline major dia is 1.0625, and minor is somewhere around 0.987", and 22" long. I don't have a ton of material to remove.
Any other material I could look at? I need 200ksi+ tensile, and I'd prefer to avoid sending it out for heat treat. I found ETD150 (not strong enough), and Flexor - M. Flexor-M looks ideal, but I can't seem to find it anywhere, and it sounds like it can be a pain, with it moving around during machining. I only need a couple of 2 foot bars at this point.
Also, I'm aware the splines should be involute and induction hardened to the the mid 50's... but, this is an extreme drag application that is not going to see any real mileage, uses old used outer CV's that are already worn, and this will likely break the bars I make in time anyway.