775 Pro Coupling

[AustinSchuh]

Originally Posted by R.C.

Your not going to run into an issue with shaft stick out, it is the same as the Banebot 775. 254 & 971 run the 12T pulley on their stuff, you can check out CAD from FRC971 on their site.

You can also email support@wcproducts.net for more info/concerns.

To echo what RC is saying here, we've been doing this for years, with RS550's, 775's, and are planning on doing it with 775 Pro's this year. RC added that part to his inventory based on feedback from us. We press it on to the 775 with the short flange 0.020" from the motor face to reduce the cantilever. We've never had an issue. (Last year's bot had 7 per robot 775's with pinions pressed on as described. We had 0 failures.) With bearings in the new 775 Pro, this should be even less of an issue.

[Greg Needel]

Originally Posted by AustinSchuh

To echo what RC is saying here, we've been doing this for years, with RS550's, 775's, and are planning on doing it with 775 Pro's this year. RC added that part to his inventory based on feedback from us. We press it on to the 775 with the short flange 0.020" from the motor face to reduce the cantilever. We've never had an issue. (Last year's bot had 7 per robot 775's with pinions pressed on as described. We had 0 failures.) With bearings in the new 775 Pro, this should be even less of an issue.

Do you guys have a source for other size gt2 pulleys? I can buy the pinion from WCP, but where do get your others from? (I was hoping mcmaster would sell them).

Also based on it's size it looks like gt2 is close to MXL, any experience in the difference between the two?

[Knufire]

Originally Posted by Greg Needel

Do you guys have a source for other size gt2 pulleys? I can buy the pinion from WCP, but where do get your others from? (I was hoping mcmaster would sell them).

Also based on it's size it looks like gt2 is close to MXL, any experience in the difference between the two?

https://www.sdp-si.com/eStore/Catalog

[Travis Schuh]

Originally Posted by Greg Needel

Do you guys have a source for other size gt2 pulleys? I can buy the pinion from WCP, but where do get your others from? (I was hoping mcmaster would sell them).

Also based on it's size it looks like gt2 is close to MXL, any experience in the difference between the two?

We buy and broach pulleys from SDP-SI. It is a lot easier only having to source pulleys and not pinions. We previously had issues reliably sourcing pinions. It would be nice to be able to buy hex broached pulleys, but I don't know of a source for that yet.

MXL may be close in pitch size to GT2, but GT2 has significantly higher power ratings than MXL. I don't remember the number (you can find them in the Gates manual if you want), but it is close to an order of magnitude of difference. I doubt that MXL would handle the motor torques, but you should check the numbers yourself.