68 Series Bearings

Product Category

News

There are several types of 6mm Ball Bearing
Yes, there are several types of 6mm ball bearings, which can vary based on their design, material, ...
Characteristics of rolling bearings compared with sliding bearings
Bearings are the product of social development, and bearings have a long history in China. Bearings...
Common bearings for motors
The bearing used by the motor is a part that supports the shaft. It can guide the rotation of the s...
6202 bearing size parameters
Regarding the size parameters of 6202 bearings, many people don’t know about 6202, let’s take a loo...
Introduction to motor bearings
Motor products have become an indispensable part of our life. No matter what type of motor product,...
What are sealed bearings?
For small-sized motors, most of them use sealed bearings, which do not require special bearing caps...

68 Series Bearings

1/4

68 Series Bearings

Scan QR code

Bearing series: 68 Series

Bearing life:up to 10 years

Bearing accuracy:up to P5, P6 accuracy class

Product certification:through Rohs, SGS and other testing certification

Temperature environment:can be used in temperature environment from -60°C to +230°C

Product Description

Bearing Specification 68 Series

Basic Bearing No.	Bore d		Outer Diameter D		Width W		Radius r		Basic Load Rating KN		Maximum Run out Speed		Weight kg/pc
									Dynamic	Static	Grease	Oil
									Dynamic	Static	Grease	Oil
	mm	inch	mm	inch	mm	inch	mm	inch	C	C_O	r/min	r/min
685	5	0.1969	11	0.4331	3	0.1181	0.1	0.006	0.715	0.282	35000	45000	0.0011
686	6	0.2362	13	0.5118	3.5	0.1378	0.15	0.006	1.08	0.44	33000	42000	0.0019
687	7	0.2756	14	0.5512	3.5	0.1378	0.15	0.006	1.17	0.51	31000	40000	0.0021
688	8	0.3150	16	0.6299	4	0.1575	0.2	0.008	1.26	0.585	29000	38000	0.0031
689	9	0.3543	17	0.6693	4	0.1575	0.2	0.008	1.72	0.82	28000	36000	0.0032
6800	10	0.3937	19	0.7480	5	0.1969	0.3	0.012	1.83	0.925	26000	34000	0.005
6800W7	10	0.3937	19	0.7480	7	0.2756	0.3	0.012	1.83	0.925	26000	34000	0.006
6801	12	0.4724	21	0.8268	5	0.1969	0.3	0.012	1.92	1.04	22000	30000	0.006
6802	15	0.5906	24	0.9449	5	0.1969	0.3	0.012	2.08	1.26	20000	28000	0.007
6803	17	0.6693	26	1.0236	5	0.1969	0.3	0.012	2.81	1.72	19000	26000	0.008
6804	20	0.7874	32	1.2598	7	0.2756	0.3	0.012	4	2.47	17000	22000	0.019
6805	25	0.9843	37	1.4567	7	0.2756	0.3	0.012	4.3	2.95	15000	19000	0.022
6806	30	1.1811	42	1.6535	7	0.2756	0.3	0.012	4.7	3.65	13000	17000	0.026
6807	35	1.3780	47	1.8504	7	0.2756	0.3	0.012	4.9	4.05	11000	15000	0.029
6808	40	1.5748	52	2.0472	7	0.2756	0.3	0.012	5.1	4.4	9000	13000	0.033
6809	45	1.7717	58	2.2835	7	0.2756	0.3	0.012	6.4	5.65	7000	11000	0.04
6810	50	1.9685	65	2.5591	7	0.2756	0.3	0.012	6.6	6.1	5000	9000	0.052

ABEC-1 TOLERANCE CLASS ABEC-1 (P0)

INNER RING									Tolerance in um/s
d mm		Δdmp		9	Vdp²)0,1 Diameter Series	2,3,4	Vdmp	Kia	ΔBs		Vbs
d mm		Δdmp		9	Vdp²)0,1 Diameter Series	2,3,4	Vdmp	Kia	ΔBs		Vbs
over	including	high	low	max			max	max	high	low	max
1)0.6	2.5	0	-8	10	8	6	6	10	0	-40	12
2.5	10	0	-8	10	8	6	6	10	0	-120	15
10	18	0	-8	10	8	6	6	10	0	-120	20
18	30	0	-10	13	10	8	8	13	0	-120	20
30	50	0	-12	15	12	9	9	15	0	-120	20
50	80	0	-15	19	19	11	11	20	0	-150	25

OUTER RING									Tolerance in um/s
D mm		Δdmp		VDp²)⁴)Open Bearings Diameter Series			Capped Bearings²)³)	Vdmp	Kia	ΔBs		Vbs
D mm		Δdmp		9	0，1	2，3，4	2，3，4	Vdmp	Kia	ΔBs		Vbs
over	including	high	low	max				max	max	high	low	max
1）2.5	6	0	-8	10	8	6	10	6	15	Identical to ΔBs and VBs of inner ring of same bearing
6	18	0	-8	10	8	6	10	6	15
18	30	0	-9	12	9	7	12	7	15
30	50	0	-11	14	11	8	16	8	20
50	80	0	-13	16	13	10	20	10	25
80	120	0	-15	19	19	11	26	11	35
120	150	0	-18	23	23	14	30	14	40

ABEC-3 TOLERANCE CLASS ABEC-3 (P6)

OUTER RING									Tolerance in um/s
D mm		Δdmp		VDp²)⁴)Open Bearings Diameter Series			Capped Bearings²)³)	Vdmp	Kia	ΔBs		Vbs
D mm		Δdmp		9	0，1	2，3，4	2,3,4	Vdmp	Kia	ΔBs		Vbs
over	including	high	low	max				max	max	high	low	max
1）2.5	6	0	-7	9	7	5	9	5	8	Identical to ΔBs and VBs of inner ring of same bearing
6	18	0	-7	9	7	5	9	5	8
18	30	0	-8	10	8	6	10	6	9
30	50	0	-9	11	9	7	13	7	10
50	80	0	-11	14	11	8	16	8	13
80	120	0	-13	16	16	10	20	10	18
120	150	0	-15	19	19	11	25	11	20

ABEC-5 TOLERANCE CLASS ABEC-5 (P5)

OUTER RING									Tolerance in um/s
D mm		Δdmp		Vdp²)Diameter Series		Vdmp	Kia	SD⁴⁾ SD1⁵⁾	Sea^4）5）	ΔBs		Vbs
D mm		Δdmp		9	0,1,2,3,4	Vdmp	Kia	SD⁴⁾ SD1⁵⁾	Sea^4）5）	ΔBs		Vbs
over	including	high	low	max			max	max	max	High	Low	max
1)2.5	6	0	-5	5	4	3	5	8	8			5
6	18	0	-5	5	4	3	5	8	8			5
18	30	0	-6	6	5	3	6	8	8			5
30	50	0	-7	7	5	4	7	8	8			5
50	80	0	-9	9	7	5	8	8	10			6
80	120	0	-10	10	8	5	10	9	11			8
120	150	0	-11	11	8	6	11	10	13			8

ABEC-7 TOLERANCE CLASS ABEC-7 (P4)

INNER RING												Tolerance in um/s
d mm		Δdmp		Δds		Vdp²)Diameter Series		Vdmp	Kia	Sd	Sia	ΔBs		Vbs
d mm		Δdmp		Δds		7，8,9	1,7,2,3,4	Vdmp	Kia	Sd	Sia	ΔBs		Vbs
over	including	high	low	high	low	max		max	max	max	max	High	low	Low	max
1)0.6	2.5	0	-4	0	-4	4	3	2	2.5	3	3	0	-40	-40	2.5
2.5	10	0	-4	0	-4	4	3	2	2.5	3	3	0	-40	-40	2.5
10	18	0	-4	0	-4	4	3	2	2.5	3	3	0	-80	-80	2.5
18	30	0	-5	0	-5	5	4	2.5	3	4	4	0	-120	-120	2.5
30	50	0	-6	0	-5	6	4	3	4	4	4	0	-120	-120	3
50	80	0	-7	0	-5	7	5	3.5	4	5	5	0	-150	-150	4

OUTER RING												Tolerance in um/s
D mm		Δdmp		Δds		Vdp²)Diameter Series		Vdmp	Kia	Sd	Sia	ΔBs		Vbs
D mm		Δdmp		Δds		7，8,9	1,7,2,3,4	Vdmp	Kia	Sd	Sia	ΔBs		Vbs
over	including	high	low	high	low	max		max	max	max	max	High	low	max
1)2.5	6	0	-4	0	-4	4	3	2	3	4	5	Identical to ΔBs and VBs of inner ring of same bearing		2.5
6	18	0	-4	0	-4	4	3	2	3	4	5			2.5
18	30	0	-5	0	-5	5	4	2.5	4	4	5			2.5
30	50	0	-6	0	-6	6	5	3	5	4	5			2.5
50	80	0	-7	0	-7	7	5	3.5	5	4	5			3
80	120	0	-8	0	-8	8	6	4	6	5	6			4
120	150	0	-9	0	-9	9	7	5	7	5	7			5

Company brand KYODO YUSHI	Product	Base oil	Usage range	Characteristics


EXXON	Multemp SRL	Polyol ester+Diester	（-50，+150）	Excellent noise suppressantproperty and extended performance life
	Multemp PS	Diester+Refined mineral oil	（-50，+130）	Excellent low temperature performance,has outstanding noise suppressant property
	Multemp SM-B	Synthetic hydrocarbon	（-50，+200）	Long service life under high temperature,Excellent low temperature performance,has high speed operation,low noise property
	Multemp ET-K	Synthetic ether+Polyol ester	（-40≥，+200）	Has more extended life under high operating temperature condition
MOBILE	Polyrex EM	Mineral grease	（-40，+180）	Long life and high temperature
	Beacon325	Synthetic grease	（-54，+150）	General purpose grease
	Andok C	Channeling petroleum grease	（-27，+120）	Smooth running,long life with minimum migration
CHEVRON	Mobil 28(MIL-G-81322)	Synthetic hydrocarbon	（-54，+177）	Wide temperature range,good low temperature torque
CHEVRON	Mobil HP	Lithium complex	（-30，+110）	Vibration,moderate speed and good corrosion resistance
SHELL	SRI-2	Mineral grease	（-30，+180）	High temperature range,good water resistance
DUPONT	Alvania 2	Mineral grease	（-35，+120）	Long life and high temperature
DUPONT	RLQ #2	Mineral grease	（-50，+150）	Low noise,high speed and high temperature
KLUBER	ASONIC	Synthetic hydrocarbon	（-50，+140）	High temperature stability with good lubricity properties
JINZHI	HANGU 2#	Mineral grease	（-20，+120）	Low noise
JINZHI	HTHS	Mineral grease	（-40，+180）	High speed,low temperature,low torque and low noise

he radial clearance of bearings with electric motor quality

Bore			CM
Over		Including		Min	Max
mm	inch	mm	inch	um	um
10	0.3937	18	0.7087	4	11
18	0.7087	24	0.9449	5	12
24	0.9449	30	1.1811	5	12
30	1.1811	40	1.5748	9	17
40	1.5748	50	1.9685	9	17
50	1.9685	65	2.5591	12	22

Datas of the mini-deep groove bearings under no load as followed:										Tolerance in um
Bore				Inch R Series	C2		NORMAL		C3		C4
Over		Including			C2		NORMAL		C3		C4
mm	inch	mm	inch		min	max	min	max	min	max	min
2.5	0.0984	10	0.3937	R2-R6	0	7	2	13	8	23	14
10	0.3937	18	0.7087	R8-R10	0	9	3	18	11	25	18
18	0.7087	24	0.9449	R12-R14	0	10	5	20	13	58	20
24	0.9449	30	1.1811	R16-18	1	11	5	20	13	28	23
30	1.1811	40	1.5748	R20-R24	1	11	6	20	15	33	28
40	1.5748	50	1.9685		1	11	6	23	18	36	30
50	1.9685	65	2.5591		1	12	8	28	23	43	38

Datas of the mini-deep groove bearings under no load as followed:									Tolerance in um
Clearance Code	MC1		MC2		MC3		MC4		MC5
Clearance	min	max	min	max	min	max	min	max	min	max
Clearance	1	6	4	9	6	11	9	14	15	22

Tolerance data for vibration of single bearing

D	V			V1			V2			V3			V4
mm	Low	Medium	High	Low	Medium	High	Low	Medium	High	Low	Medium	High	Low	Medium	High
3,4	80	44	44	60	35	32	48	26	22	31	16	15	28	10	10
5,6	110	72	60	74	48	40	58	36	30	35	21	18	32	11	11
7,8,9	130	96	80	92	66	54	72	48	40	44	28	24	38	12	12
10,12	160	120	100	120	80	70	90	60	50	55	35	30	45	14	15
15	210	150	120	150	100	85	110	78	60	65	46	35	52	18	18
17	210	150	120	150	100	85	110	78	60	65	46	35	52	25	25
20	260	190	150	180	125	100	130	100	75	80	60	45	60	25	25
22,25	260	190	150	180	125	100	130	100	75	80	60	45	60	30	32
28	260	190	150	180	125	100	130	100	75	80	60	45	60	35	40
30,32	300	240	190	200	150	130	150	120	100	90	75	60	70	35	40
35	300	240	190	200	150	130	150	120	100	90	75	60	70	42	45
40	360	300	260	240	180	160	180	150	130	110	90	80	82	50	50
45	360	300	260	240	180	160	180	150	130	110	90	80	82	60	60
50	420	320	320	280	200	200	210	160	160	125	100	100	95	70	70

Previous : 69 Series Bearings

Next : 63 Series Bearings

68 Series Bearings

FOCUS ON SILENT MOTOR BEARING R&D AND MANUFACTURRING SINCE 1995

FOCUS ON SILENT MOTOR BEARING R&D AND MANUFACTURRING SINCE 1995

68 Series Bearings

There are several types of 6mm Ball Bearing

Characteristics of rolling bearings compared with sliding bearings

Common bearings for motors

6202 bearing size parameters

Introduction to motor bearings

What are sealed bearings?