YoYo Bearings

YoYo Bearing can be played in two extreme states.

One configuration involves using a thick lubricant in the ball bearing, so that sleep times will be low. This configuration is generally used for looping tricks.

The second configuration involves either running a bearing with thin lube in small amounts or cleaning the ball bearing of any lubricant – playing a “dry” bearing. Dry bearings are usually used so yo-yos will be less responsive during string trick play

bearing and balls material:

chrome steel GCr15 rings and chrome steel balls
stainless steel rings and stainless steel balls
hybrid ceramic: stainless steel rings and Si3N4 ceramic balls

bearing tolerance level:

ABEC-1, ABEC-3, ABEC-5
ABEC ratings don’t make any difference to yo-yo play, as a higher ABEC rating bearing will not spin any longer

Size A:

fits Duncan, Playmaxx, YoYoFactory, ZanNavi yo-yos.
bearing model: MR105ZZ—5*10*4mm
bearing shape: flat and konkave
konkave shape, the name is Dif-E-Yo Konkave bearing Size A, the outer surface is not flat, but slightly concave, there is a groove on outer ring that centers the string.

Size B:

fits small bearing YoYoJam yo-yos, including SpinFaktors, Kamaitachi, Sunset Trajectory and Matrixx. It also fits the SuperYo Renegade, Spintastics Revolver and Eclipse.
bearing model: R168ZZ—1/4″*3/8″*1/8″
bearing shape: flat

Size C:

fits large bearing YoYoJam yo-yos, including Hitman, Lyn Fury, Spinmaster, Big Ben, Journey, Patriot, Nightmoves, Shockwave, Speeder, as well as YoYoFactory G5, 888, Skyline, Grind Machine.
bearing model: R188ZZ—1/4″*1/2″*3/16″
bearing shape: flat and konkave
Dif-E-Yo Konkave Bearing Size C is the mega popular konkave bearing made by Frank Difeo. The outer surface is not flat, but slightly concave, there is a groove on outer ring that centers the string.

Size D:

fits all HSpin and SPYY yo-yos, like Good&Evil, Envy, Envy64, Cut and Pyro.
bearing model: 685ZZ—5*11*5mm
bearing shape: flat and konkave
konkave shape, the name is Dif-E-Yo Konkave bearing Size D, the outer surface is not flat, but slightly concave, there is a groove on outer ring that centers the string.

Size E:

fits Spintastics Tornado, Tigershark, Riot, Great White, Comet, Torch, Firefly and Yomega yo-yos.
bearing model: R155ZZ—5/32″*5/16″*1/8″
bearing shape: flat

Size G:

fits all custom yo-yos.
bearing model: R166ZZ—3/16″*3/8″*1/8″
bearing shape: flat

Size I:

fits all Tom Kuhn yo-yos.
bearing model: R2-5ZZ—1/8″*5/16″*9/64″
bearing shape: flat