Linear Bearing Platform - Radial Movement?

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MrDoctorDIV
 
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Joined: Thu Mar 20, 2014 8:43 pm

Linear Bearing Platform - Radial Movement?

Post by MrDoctorDIV »

Do the linear ball bearing platforms support radial movement? I need to mount a rod that will rotate vertically rapidly and with rapidly changing movement, so speed and reliability in the motion are important. Your radial bearings will not support my build requirements as they require more effort and material to mount the way I want.

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adafruit_support_mike
 
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Joined: Thu Feb 11, 2010 2:51 pm

Re: Linear Bearing Platform - Radial Movement?

Post by adafruit_support_mike »

Linear bearings allow some amount of rotation, but it isn't good for them.

The whole point of the design is to achieve low friction by allowing the ball bearings to circulate in an oval track. Rotation forces the ball bearings to spin against the walls of the track, increasing the friction and wear.

If you need linear and rotational freedom from the same joint, you'd probably be better off with straight bushings. If you really need low friction in both degrees of freedom, take a look at pneumatic bearings.

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