Re: [CAD_CAM_EDM_DRO] best type of hub for pulleyts

turbulatordude wrote:

>Hi all,
>
>looking for a XL pulley and it seems they come with a standard bore
>that uses set screws, or a type called a Fairloc which looks like an
>angled clamp with a screw that clamps on the shaft.
>
>

I used XL pulleys from McMaster-Carr, and they worked fine. I modified
some of them, others I used basically as is. This was on a 150-Lb
mini-mill,
bit I think if you select the belt correctly for the loads applied, then the
steel pulleys will be fine.

>I'm not sure if the forces are too high or if these styles are fine.
>
>I am hoping that I can get a secure clamping action and not dig the
>shaft like set screws. I could file a flat if that would work. but
>cannot do a keyway.
>
>

Two flats at 90 degrees is best. if there is enough meat on the hub,
you can use
two setscrews, one on top of the other, to prevent any loosening.

>I am not sure how much pressure the plastic pulleys can handle with
>the pressed in hub.
>
>

I'd avoid the plastic ones except on the lightest machines (Sherline, Taig).

Jon