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Unread 28-02-2004, 22:23
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Re: Clamping wheel hubs

from what it sounds like your bolting 2 plates on either side of a unkeyd wheel. is this right? because if that is what your saying, the bolts, and the friction of the 2 plates pressing ageinst the wheel would deffently be enugh to drive it.

sorry if i missed the point totaly
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Unread 28-02-2004, 22:27
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Re: Clamping wheel hubs

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Originally Posted by jacob_dilles
from what it sounds like your bolting 2 plates on either side of a unkeyd wheel. is this right? because if that is what your saying, the bolts, and the friction of the 2 plates pressing ageinst the wheel would deffently be enugh to drive it.

sorry if i missed the point totaly
You actually totally got the point. The wheel would be unkeyed but the hubs would be keyed. The hubs would clamp the wheel. Don't think about the bolts going through the wheel to drive it (since that part is very thin plastic), think only about the friction of the clamping force of the two plates.

How do you know it would be enough?

Also, does surface area have anything to do with this?
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Unread 28-02-2004, 22:34
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Re: Clamping wheel hubs

well if the bolts arent in direct contact...

it depends on a lot of things. first of all, the 2 surfaces. if there both plastic then its gonna take more force then steel to get them to stay. if you want it to be pure friction, its gonna be the more torque the better. roughing up one or both surfaces will reduce the amount of torque needed. genraly speaking, if your dealing with metal a half turn past hand tight should be okay for 1/4, a 3/4ths a turn past for 3/16. if its lexan or plexi, your gonna have to be realy torquin down, maybe 2 or 3 turns past hand tight.

but friction can ALWASE slip, especialy if there is an eccesive (and usaly unplaned) force in a parrallell direction to the planes that the friction is acting on (sry a bit confusing). reinfocing with pop rivits or even 1 or 2 roll pins is never a bad idea. hope everything works out.
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Unread 28-02-2004, 22:38
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Re: Clamping wheel hubs

The drive plates will be 3/16" thick aluminum and the wheel is polypropelyne plastic
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