Clarification on McMaster Rollers

  • Thread starter thoain14
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  • #1
thoain14
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I just wanted some clarification on how these rollers worked. All you would technically need to do is to build the frame and attach these to the frame and motorize it correct? Do you still need to add a bearing to the sides? If you do, how would you because the axle length on each side is about half an inch if not less for other rollers? I'm basically confused on whether the hex axle on the side spins as well or does it stay stationary and the roller frame spins. Thanks, any clarification would be helpful
 

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Answers and Replies

  • #2
Baluncore
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Do you still need to add a bearing to the sides?
No extra bearings are required. There are two hex-bore bearings pressed into the ends of the roller. The hex axle rod passes through both of those bearings.

I'm basically confused on whether the hex axle on the side spins as well or does it stay stationary and the roller frame spins.
The hexagonal axle does NOT spin. The hexagonal end of the shaft rests in a narrow slot that you provide to prevent the shaft from turning. The inner races of the hex-bore bearings are also prevented from rotating. The outer races rotate with the roller.

A bearing failure will not cause the axle to rotate. It will lock that roller. That will prevent continuous axle rotation from damaging the support structure.

https://www.mcmaster.com/catalog/2277t413
See the column on the left for details of the ball bearings.
 
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  • #3
thoain14
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Okay, thank you! How would you go about motorizing this in a roller set high format (above the frame), while it not having any contact with the rollers itself (so something like chain and sprocket welded onto the roller)?
 
  • #4
Baluncore
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That is an idler roller. You need a drive roller, that has a solid, longer, round axle, with bearings external to the roller.

We do not yet know enough about your project to advise you how to drive the belt or rollers.
Will you be using a conveyor belt? or making a bare bed of rollers ?
 
  • #5
Lnewqban
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Please, see:
https://www.thomasnet.com/articles/...about-roller-conveyors-types-design-and-uses/

https://docs.rs-online.com/beca/0900766b8007c523.pdf

p1.jpg

Z1qMw0icpEx_.jpg


hex-axle-1024x469.png
 
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  • #6
thoain14
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That is an idler roller. You need a drive roller, that has a solid, longer, round axle, with bearings external to the roller.

We do not yet know enough about your project to advise you how to drive the belt or rollers.
Will you be using a conveyor belt? or making a bare bed of rollers ?
I basically need to make a bare bed of rollers. I will be moving around insulated panels that will have to lay on the rollers with their longer side facing forward similar to how you would insert the tape into a VCR (so basically 1/3 of the panel will be hanging off the bed hence the above frame method). I need rollers that are about 5.5' - 6' long. Any suggestions on how I would motorize this up? I can't have this method touch the panel itself like using the sprocket and chain method mentioned above. Any suggestions would be helpful. Thank you!
 

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