Inch Sized Miniature Radial Ball Bearing R4 Open R4zz R4 2RS

China Inch Sized Miniature Radial Ball Bearing R4 Open R4zz R4 2RS, Find details about China Bearing, Ball Bearing from Inch Sized Miniature Radial Ball Bearing R4 Open R4zz R4 2RS

Basic Info.

Model NO.

Specification

6.35*15.875*4.978mm

Origin

Shandong China (Mainland)

HS Code

8482102000

Model NO.

Specification

6.35*15.875*4.978mm

Origin

Shandong China (Mainland)

HS Code

8482102000

Product Desciption

Inch Sized Miniature Radial Ball Bearing R4 Open R4zz R4 2RS

Chrome Yoyo Bearings
It have long been the industry standard for Yoyo enthusiasts the world over. These bearings have chrome steel races, balls,
retainers and shields.
Stainless Steel Yoyo Bearings
In an attempt to improve performance of these bearings,are specially designed for competitive yoyo enthusiasts. Competitive players sought out high ABEC bearings made of high grade materials such as stainless steel. 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 yoyo 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.Yoyo Ceramic Bearings are specially designed for competitive Yoyo enthusiasts.

model	d	D	H		Cr(N)	Cor(N)	1000r/min
model	d	D	open	seal	Cr(N)	Cor(N)	grease	oil
R1-4zz	1.984	6.35	2.38	3.571	284	96	67	80
R133zz	2.38	4.762	1.588	2.38	144	53	80	95
R1-5zz	2.38	7.938	2.779	3.571	552	176	60	71
R144Jzz	3.175	6.35	2.38	2.779	311	110	67	80
R144zz	3.175	6.35	2.38	2.779	284	96	67	80
R2-5zz	3.175	7.938	2.779	3.571	558	180	60	67
R2-6zz	3.175	9.525	2.779	3.571	640	227	53	63
R2zz	3.175	9.525	3.967	3.967	631	219	56	67
R2Azz	3.175	12.7	4.366	4.366	640	227	53	63
R155zz	3.967	7.938	2.779	3.175	359	150	53	63
R156zz	4.762	7.938	2.779	3.175	359	150	53	63
R166zz	4.762	9.525	3.175	3.175	709	272	50	60
R3zz	4.762	12.7	3.967	4.978	1301	488	43	53
R3Azz	4.762	15.875	4.978	4.978	1480	621	38	45
R168zz	6.35	9.525	3.175	3.175	373	172	48	56
R188zz	6.35	12.7	3.175	4.762	1082	442	40	50
R4zz	6.35	15.875	4.978	4.978	1480	621	38	45
R4Azz	6.35	19.05	5.558	7.142	2336	896	36	43
R1810zz	7.938	12.7	3.967	3.967	542	276	40	48
R6zz	9.525	22.225	5.558	7.142	3332	1422	32	38
R10zz	9.525	15.875	3.967	3.967	815	411	28	31
R12zz	12.7	19.05	3.967	3.967	898	524	21	26