spazz
Plastic
- Joined
- Feb 10, 2013
- Location
- phoenix arizona usa
Hello everyone.
I have a product that I have been producing for airsoft guns for quite some time.
Bushings made from heat treated steal. They work very well and are considered to be the best by many people that use them.
I am changing manufacturer's and I am looking at new materials.
First thing, bearings and softer materials usually used for bushings are not under consideration. similar stuff has been on the market for years and they fail on a regular basis. No bronze, brass or similar materials will be considered. They are not good materials for my purposes because of the way these things are used.
Current material being used is 20CrMoTi (as listed from my original manufacturer in hk). I also made a couple of sample runs in m2 hss, but they botched the jobs, one of the reasons I am changing manufacturer's.
The current manufacture I am dealing with is recommending 20Cr. They say it will get to 55hrc but the only place i could find stats on the material for after heat treat says that material gets to about 28-34hrc. I can't find the 20CrMoTi stats anywhere.
I am looking for a material that will get me 50+hrc without moving around to much.
Project sizes are 5.9/6/7/8/9mm od, 3mm id, 2mm thick with a .6mm flange.
Holes are reamed to final size after heat treat.
Reason for using harder material:
I am using a harder material for my bushings because these gearboxes don't run constantly.
They have intermittent spurts of activity. Which gives the axles time to push through the lubricant and have metal to metal contact between cycles.
The axles on the gears are 45-55hrc and when used with my bushings, skate across the surface instead of digging in and causing wear like they do in bronze/brass/stainless and other softer materials.
Bearings fail on a regular basis. Either because they have crap cages for the balls, tolerances that are too loose, or because users install/maintain them improperly. Plus 2 of the gears see a significant axial load, and radial ball bearings are not good for that.
Thank you for your time.
Edit:
I would also consider having these made stateside if I could find a manufacture that could produce these without killing me in cost. Usual batch runs are 2400pc+ of each size
I have a product that I have been producing for airsoft guns for quite some time.
Bushings made from heat treated steal. They work very well and are considered to be the best by many people that use them.
I am changing manufacturer's and I am looking at new materials.
First thing, bearings and softer materials usually used for bushings are not under consideration. similar stuff has been on the market for years and they fail on a regular basis. No bronze, brass or similar materials will be considered. They are not good materials for my purposes because of the way these things are used.
Current material being used is 20CrMoTi (as listed from my original manufacturer in hk). I also made a couple of sample runs in m2 hss, but they botched the jobs, one of the reasons I am changing manufacturer's.
The current manufacture I am dealing with is recommending 20Cr. They say it will get to 55hrc but the only place i could find stats on the material for after heat treat says that material gets to about 28-34hrc. I can't find the 20CrMoTi stats anywhere.
I am looking for a material that will get me 50+hrc without moving around to much.
Project sizes are 5.9/6/7/8/9mm od, 3mm id, 2mm thick with a .6mm flange.
Holes are reamed to final size after heat treat.
Reason for using harder material:
I am using a harder material for my bushings because these gearboxes don't run constantly.
They have intermittent spurts of activity. Which gives the axles time to push through the lubricant and have metal to metal contact between cycles.
The axles on the gears are 45-55hrc and when used with my bushings, skate across the surface instead of digging in and causing wear like they do in bronze/brass/stainless and other softer materials.
Bearings fail on a regular basis. Either because they have crap cages for the balls, tolerances that are too loose, or because users install/maintain them improperly. Plus 2 of the gears see a significant axial load, and radial ball bearings are not good for that.
Thank you for your time.
Edit:
I would also consider having these made stateside if I could find a manufacture that could produce these without killing me in cost. Usual batch runs are 2400pc+ of each size
Last edited:
