Belting Pulley Hubs & Discussion

[ttldomination]

Hello Everyone,

I know there are a multitude of posts on this topic, and I've tried to go through as many as possible, but I still have a few questions.

(1) Through the gates website, it appears that if we want to purchase a pulley for a belt (Let's assume PowerGrip GT2?) then there are two primary attachment types. Type 1 seems to be pressing the pulley onto the shaft and type 2 is using pulleys with set screw hubs.

Now my question is that are these set screw hubs reliable? I know that since they're sold in this application, they must "work", but I wanted some team input on this.

(2) Looking through McMaster, I learned that we can also buy pulleys which take in bushings, and then we can purchase bushings which have key bores. Anyone have any comments on this? Is there a way to purchase pulleys with a key hub already on them?

(3) Is there a place where I can get timing belt pulleys with a Hex Bore? All of my searching has proved fruitless.

(4) I would finally appreciate some advice on our situation. Our team has used #25 chain in the past with little success. I'm not blaming the chain; I'm blaming our building methods. So is stepping into belting a step in the right direction?

I am of the opinion that belting takes more effort/precision than #25 chain, and if we couldn't handle #25 chain, then perhaps timing belts are a bit out of our reach.

All comments are much appreciated,
Sunny G.