Bearing Type for Rotary Application
Bearing Type for Rotary Application
(OP)
I need to select a bearing type for a rotary table. The table will be an aluminum plate, 48 inch dia 75 lbs, and will need to rotate at 60rpm max. I would like the plate to be supported by just the bearing. would a slewing ring be best or can I use an angular contact bearing or even just a regular large ball bearing? There won't be much load on the table top, maybe 10 lbs max static load.





RE: Bearing Type for Rotary Application
I suggested we build an encoder table a little smaller diameter with parts like this -
https://www.northerntool.com/shop/tools/product_20...
RE: Bearing Type for Rotary Application
If you need a very precise trajectory, then any of the bearings you propose might work. If you have an overturning moment, the slewing ring, or a Kaydon 'X' bearing would be indicated. If your environment is dusty or wet, you might want a sealed bearing.
There are no 'regular' large bearings. In sizes larger than truck wheel bearings, they start getting expensive in money and in time.
What causes the table to rotate? Some ways of doing that will put a radial force on the bearings; you have to account for stuff like that.
Mike Halloran
Pembroke Pines, FL, USA
RE: Bearing Type for Rotary Application
The table would be directly connected to a drive shaft on a DC motor. I am trying to improve upon a current design that once used casters and now uses a glide ring. I would like to remove these extra supports to reduce cost and parts.
RE: Bearing Type for Rotary Application
Caution: Motor bearings are usually sized for zero axial load, so a motor that could support an axial load would be a special; but it's not impossible.
Mike Halloran
Pembroke Pines, FL, USA
RE: Bearing Type for Rotary Application
Unfortunately the diameter of the plate is fixed. The thickness is currently at 3/8" and I'd be concerned about a thinner plate running flat. I am going to test the system with a slewing ring.
Thanks
RE: Bearing Type for Rotary Application
http://repairguide.autozone.com/znetrgs/repair_gui...
I'd use the high capacity COTS axle and hub from Northern Tool, and drill the axle for a small drive spindle/shaft to pass thru, like the automotive.
You have not mentioned the power and rpm requ8irements, but there are any number of small nylon spline or hex or even square drive miniature couplings that //might// make easy to couple the motor to the drive spindle, and the drive spindle to the COTS hub with minor modifications. Your DC motor would only have to drive that hub and then the table.
RE: Bearing Type for Rotary Application
https://www.amazon.com/s/?ie=UTF8&keywords=laz...