KJ bearing is a specialized manufacturer of yoyo bearings. They make both inch and metric bearings.
Features :
Shield / Closure: Open, Teflon Sealed, Rubber Seals and Shield
Tolerance codes: ABEC-3, ABEC-5, ABEC-7,ABEC-9
Material: AISI52100, AISI440C, Ceramic Ball.
Size:
R168ZZ 1/4"x3/8"x1/8" Shielded
R155-2RS 5/32"x5/16"x1/8" Sealed
R2-5-2RS 1/8"x5/16"x9/64" Sealed
R188ZZ 1/4"x1/2"x3/16" Shielded
MR105ZZ 5x10x4 Shielded
MR84ZZ Sealed 4x8x3
MR95ZZ Sealed 5x9x3
R156ZZ 3/16"x5/16"x1/8" Shielded
Stainless Steel Yoyo Bearings
In an attempt to improve performance of these bearings, competitive players sought out high ABEC bearings made of high grade materials such as stainless steel. The term ABEC stands for Annular Bearing Engineering Council. The higher the ABEC rating, the lower the friction and smoother and faster roll. ABEC ratings are given in odd numbers only 1,3,5,7 and 9.
Ceramic Ball Bearings
Today, ceramic bearings are the hottest thing in yoyo technology. They are lighter, smoother, stiffer, harder, and corrosion resistant. These characteristics allow for a wide range of performance enhancements in bearings. Ceramic dissipates heat quickly, reducing friction and wear while maintaining a precision smooth surface. Today's leading edge ceramics are made with Silicon Nitride (Si3N4) and have characteristics similar to the heat absorbing, highly resilient tiles on the Space Shuttle.
5mm x 10mm x 4mm - The A bearing fits most Duncan, Playmaxx, YoYoFactory, ZanNavi and many other yo-yos.
.250 x .375 x .125 (1/4" x 3/8" x 1/8") - This bearing fits small bearing YoYoJam yo-yos, including SpinFaktors (but not the HG), Kamaitachi, Sunset Trajectory and Matrixx. It also fits the SuperYo Renegade, and the Spintastics Revolver and Eclipse.
.250 x .500 x .187 (1/4" x 1/2" x 3/16") - Fits the large bearing YoYoJam yo-yos including the Hitman, Lyn Fury, Spinmaster 2 and 3, Big Ben, Patriot, Nightmoves 2 and 3, Shockwave 3, the Speeder and the Speedmaker, as
well as the YoYoFactory G5 and 888.
5mm x 11mm x 5mm - Fits B.I.S.T., HSpin and SPYY yo-yos.
.156 x .312 x .125 (5/32" x 5/16" x 1/8") - Fits the Spintastics Tornado, Tigershark, Riot, Great White, Comet, Torch, and Firefly
