belt drive mc pulley

[FigureLLC]

a customer brought me a belt drive mc pulley, like in the pic, and he said he wanted the teeth left uncoated. i said i think it'd be fine coated, but i said sure, easy enough to mask. just now i went to blast it, and oh yeah... how'm i gonna keep from blasting the shiny teeth.

so 1) is it safe to blast the teeth and coat them without fear of failure down the road?

and 2) if not, how should i deal with the lips adjacent the teeth when blasting?

thanks guys!

[Harleydad]

I always mask the teeth. I use the 1" wide high temp green tape butting it up against the lip. The 1" will obviously not cover the width so spin the belt drive 180 degrees and mask as you did the first time.
I would mask the same way for blasting

[FigureLLC]

you tha man. thanks!

[FigureLLC]

how bout v-ribbed pulleys like this one? any difference between how i would treat aluminum vs steel? e.g. should i blast the belt surface on the aluminum, but not the steel? blast both or neither? the aluminum pulley i have is blue anodized, so it'd kinda mess with the color scheme if i masked off the pulley surface leaving it blue. i'm guessing i shouldn't coat either steel or aluminum belt surfaces? thanks!

[baz]

the rear belt pulley has a plating on the teeth area for better wear resistance do not remove it . i mask the same way Harleydad does

[FigureLLC]

the rear belt pulley has a plating on the teeth area for better wear resistance do not remove it . i mask the same way Harleydad does

yeah, i took that advice and the customer was happy. i didn't know that was an anti-wear coating, but it makes sense.

so how bout engine pulleys? these are used, so i can't tell if the belt surface was painted (on the steel ones) and wore off naturally or what. there is paint, but anywhere the belt made contact it looks bare. blast and coat the surface?

[SCOTTRODS]

yeah, i took that advice and the customer was happy. i didn't know that was an anti-wear coating, but it makes sense.

so how bout engine pulleys? these are used, so i can't tell if the belt surface was painted (on the steel ones) and wore off naturally or what. there is paint, but anywhere the belt made contact it looks bare. blast and coat the surface?

Generally, here's the scoop. Don't blast ANY belt surfaces. If there's anodize on it, leave it alone, let the belt wear any that's gonna wear. Have the anodize removed chemically, or electrically or however,.... but you do not want a blasted surface for your belst. It will eat the belts up in short order. This is especially true for steel, but I'd say use the same philosophy with ANY pulley.

The aside: As long as you can polish the belt contact surface down using really high grit paper or a machine situation, Pulley contact surfaces must be very smnooth and clear of defects, scratches, gouges, etc....

[baz]

you could use a buffing wheel with greasless compound ,that should remove the anodize and leave a bright smooth finish