The seal mentioned was actually 1/4" thick, and per Kevins' & my conversation we made it 3/16" thick, just enough to actually seal the seal plate.
(Yours does look that thick, however 1/4 & now 3/16" is what we normally use)
Am sorry I hadn't had a chance to send you a new thinner one, was seriously swamped for the last few months & missed it.
The seal durometer is soft enough you can fully compress it between your fingers.
The mounting bolts easily compress it.
Myself & none of our testers had ever had the brake housing and/or bolts loosen and/or move at all.
Will do some additional testing with this in particular as we have NEVER seen this happen.
You can also easily cut the material off the seal near the bolts, that would eliminate any possible concerns.
The China produced bearing that was mentioned was actually tested for hardness & tolerance & did quite well!
Have one in my sled have put to very hard use for over 6000 miles & is still doing well, same with the seal mentioned, & the mounting bolts.
Have since replaced these bearings in the kits because of supply reasons, the quality was fine.
We must have a constant supply of quality parts to supply kits.
Unfortunately, using NTN/SKF etc becomes very problematic as many are popular to fake low quality bearings.
There is no guarantee you are getting what you think you are.
No matter what we sell, it needs to hold up, using a low quality bearing would be shooting ourselves in the foot.
Have seen many fake parts & they cause all kinds of problems, the last thing we want is a fake bearing causing an issue.
(Motion Industries, a major US bearing supplier was even sued for distributing fake bearings)
We would rather use a better one with better tolerances than stock, therefore we have been using ORS Bearings as they are good quality manufactured with KOYO equipment & less likely to be faked.
Have researched this heavily as I had myself run into fake SKF & MOOG bearings & wanted no issues with these in our products.
Invested quite a bit of time eliminating possible issues with the seals, bearings & installation.
Hope this helps!
RockMeister
PS Jerry with thegreaser.net simply hasn't had a chance to add the Grease It to his website. He does have & does sell them.