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Modify Tech J-caged Hybrid Ceramic Ball Bearing 8mm

9 Customer Reviews

by Jeffrey C. on 02/04/2022
"These j caged ceramic ball bearing are the best. I've popped steal j caged prommy and umbrella brand bearing on high stress builds for dsg and dmrs. But these bearings from modify I've never popped no matter what I throw in the gearbox. These are the best, if anyone says otherwise they are lying cause they never tried these before.
by Caleb H. on 11/26/2019
"HOLY COW!

I've run steel ball bearings in my gearbox, but these are next level. If you spin one in your hand, you'll immediately feel how smooth they are. There's no "textured" feeling of the balls rolling over the races, it's just smooth as glass (or in this case, ceramic).

Have used these for a few thousand rounds; no complaints. I only run an M120 spring, so not really a severe duty build. They press flawlessly into a Retro Arms gearbox shell (tolerances on both are bang-on). No need for super glue to hold them in.

If you DO press them in, make sure you have a tool of some kind to press the OUTER race of the bearing into the gearbox shell. If you hammer on the center, you could damage the bearing (that goes for any ball bearing, not just these).
by John M. on 08/02/2016
"Probably the best 30$ I put into my gearbox. Spins so long and super quiet u cannot hear anything but the piston. 5 outa 5
by Haakon L. on 02/02/2016
"Spins great, dont lube them however, seen people destroy them that way. They are lubed during production and should not be tampered with. From a perfect shim with stock bearings, I only had to remove 4x0.1mm shims in total for these to be perfectly shimmed. So far it seems like my gun is shooting more smoothly than before.

These will probably sustain a medium-high stress build.
by Scott S. on 07/16/2014
"Hands down these are the smoothest bearings I've ever used. Words are not enough to describe the pure awesomeness of these bearing.
by linza w. on 05/27/2014
"These are the best 8mm bearings on the market, hands down. Much much stronger than steel bearings and CAN INFACT be used with 400 FPS and over setups. I've seen these run and never break in M160 DSG setups. These aren't just stronger than any other bearings, they also are much more smooth running and help the gears spin even way better than any other bearings. Look up the G&P bearings vs Modify Ceramic bearings test on YouTube. I've never seen a better bearing and I'll never use any other brand 8 mil bearings for long term use. These are where it's at! I've used them for a long time and are still running perfectly.
by Joe S. on 10/20/2013
"These work great with high speed set ups. EXTREMELY smooth. Highly recommend it for high RPS builds.

Do NOT use these for 400fps or higher, it will ruin your motor and gears!!! Metal bushings should be used instead. For high speed set ups though, these are the best on the market. They're worth the money.
by Austin L. on 08/26/2014
"Funtional wise: These are fantastic! The gears spin freely for what seems like hours and it runs very smoothly!

However, these bearings are thicker, and limited the amount of shims that I was able to use by A LOT. In the end (after three hours of trial and error and modification), I was able to make them work if I used two thinner bearings on top of the spur and bevel to allow more shims.

If you want really good bearings but want to make sure that you'll be able to shim freely, then get SHS bearings. They're 1/3 of the price and better than G&P bearings. If you think you're gearbox will allow for enough shims, go ahead and get these.
by Dwight C. on 01/19/2020
"So just got this in and with honesty don't believe the hype. Don't get me wrong this are a very nice set of bearing but I don't think there 30 dollars good. now i could have got a lemon set but mine didn't spin like the video (I'm pretty sure everyone reading this seen) and I have a set of G&P ones that sound and in my opinion better because of price.