Quote:
Originally Posted by magnets
Now that I've stopped in with a team that has some more vex parts, I thought I'd post my opinions.
There are two parts that I'm not a big fan of, and these are the 40 tooth dog gear, and some of the pinions. The bearings (which come pressed/locktited into the gear) stick out the end, which is a little weird. Once you pop the bearing out to replace it with one that actually fits, you'll notice that the hole is oversize, and you'll need to get some locktite. The dog pockets are also way bigger than they need to be. It would also be nice to see fillets on the 40 tooth gear like there are on the 44. I don't have a vex dog with me, but the CAD model shows no fillets there either, unlike the AM ones. We've found that these fillets make a lot of difference. Those right angles are huge places for stress to concentrate.
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These are all super trivial complaints and have no bearing on the functionality of the product. Why would you expect anything other than the bearing that is currently in the gear to fit perfectly (for the record, we loctite every bearing we press)? Why would you want the dog pockets smaller? What if you were going to use this gear for a larger gearbox, say to disengage a winch? Would you want a larger dog?
Have you really seen a dog fail because the teeth didn't have radiused corners? I haven't. The weakest portion of a dog is the threaded hole. If anything the corner that you want radiused is at the base of the tooth, not the vertical edges. We have run unradiused edge dogs with zero issue.
Perhaps you should consider applying to VEX and then you can design their products?