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Materials for Cam with an Oscillating Follower?

Materials for Cam with an Oscillating Follower?

Materials for Cam with an Oscillating Follower?

(OP)
I am designing a cam with a oscillating follower, and am not sure what materials to use.  The cam rotates 90-100 degees and oscilates back and forth every 3 sec, and raises a bar aproximately 1".  My thoughts were to machine the cam from CR1018, and using a replaceable brass wear surface on the bar.  What type of brass will provide a good wear surface against CR 1018?  Will it be necessary to hardend the cam?

RE: Materials for Cam with an Oscillating Follower?

Have you calculated the P/V? Is it lubricated and what is the load?

RE: Materials for Cam with an Oscillating Follower?

(OP)
P/V?  There is no lubrication and the load is less than 5 lbs.

RE: Materials for Cam with an Oscillating Follower?

Any cam run without lubrication is going to wear.  Could I suggest "Oil Filled Cast Nylon" available from McMaster-Carr for the follower.

http://www.mcmaster.com/

RE: Materials for Cam with an Oscillating Follower?

I doubt any material will work without lubrication. The best you can get is line contact and most plastics do not do well in this type of application. A roller for the follower will work better.

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