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Customized Bearing Chrome Steel 688 2RS Bearing C2 C0 C3 C4

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Customized Bearing Chrome Steel 688 2RS Bearing C2 C0 C3 C4

Brand Name : BUGAO

Model Number : 688

Certification : ISO9001:2015

Place of Origin : China

MOQ : Negotiable

Price : Negotiable

Payment Terms : T/T

Supply Ability : 30,000,000 sets per year

Delivery Time : 2-5days

Packaging Details : Single/Barrel/Individual packing, Industrial/Tube Packing, Custom Packing

Bearing Name : 688 ZZ Bearing

Bearing Material : Chrome Steel

Precision of bearing : P0, P6, P5, P4

Seal & Sheild : Open, Z, ZZ, RZ, 2RZ, RS, 2RS

Noise level of bearing : Z1V1, Z2V2, Z3V3,Z4V4

Clearance of bearing : C2, C0, C3, C4

Bearing life : Up to 10 years

HS code : 8482102000

Packaging : Individual packing, Tube packing, Custom packing

OEM Service : Customization Welcomed

Seperated : Unseperated

Lubrication : Grease or Oil

Samples : Available

MOQ : Depends on Models

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‌Product Specification: 688 ZZ/2RS Deep Groove Ball Bearing‌

‌1. Technical Parameters‌

‌Basic Dimensions‌

Parameter	Value
‌Inner Diameter (d)‌	8 mm
‌Outer Diameter (D)‌	16 mm
‌Width (B)‌	5 mm

‌Performance Data‌

Parameter	Value
‌Dynamic Load Rating (Cr)‌	1.96 kN
‌Static Load Rating (C0r)‌	0.96 kN
‌Limiting Speed (Grease)‌	34,000 rpm
‌Limiting Speed (Oil)‌	40,000 rpm
‌Weight‌	4.5 g

‌Features‌

‌Sealing‌: Dual protection (ZZ: Metal shields + 2RS: Rubber seals).
‌Material‌: Chrome steel (GCr15), HRC 60-64 hardness.
‌Lubrication‌: Pre-lubricated with high-speed grease (optional customization).

‌2. Key Applications‌

‌688 ZZ/2RS bearings‌ are engineered for compact, high-speed, and moderate-load scenarios:

‌Electric Tools‌:
- Drills, grinders, and small motors.
‌Home Appliances‌:
- Cooling fans, washing machine pumps, vacuum cleaners.
‌Automotive Components‌:
- Window regulators, wiper motors, alternators.
‌Industrial Machinery‌:
- Miniature gearboxes, conveyor rollers, textile spindles.

‌3. Competitive Advantages‌

Feature	Benefit
‌Dual Sealing‌	Dust/water resistance for harsh environments (IP65 equivalent).
‌Low Noise‌	Precision grinding ensures <20 dB(A) at 10,000 rpm.
‌Long Service Life‌	10,000+ hours under standard operating conditions (25°C, 50% RH).
‌

‌4. Quality Assurance‌

‌Certifications‌: ISO 9001:2015, RoHS, REACH compliant.
‌Testing‌: 100% rotational torque and noise level inspection.

‌5. Customization Options‌

‌Material‌: Stainless steel (AISI 440C), ceramic hybrid.
‌Lubricant‌: Food-grade grease, high-temperature grease (-40°C to 200°C).
‌Special Markings‌: Laser engraving for traceability.

‌6. Ordering Information‌

Part Number	Sealing Type	MOQ	Lead Time
‌688-ZZ‌	Metal shields	500 pcs	7-10 days
‌688-2RS‌	Rubber seals	500 pcs	7-10 days
‌688-ZZ/2RS‌	Hybrid sealing	1,000 pcs	15 days (custom)

Technical Parameters of Power Tool Ball bearings:

Basic Bearing No.	Bore d		Outer Diameter D		Width W		Radius r		Basic Load Rating KN		Maximum Run out Speed		Weight Kg/pc
									Basic Load Rating KN		Maximum Run out Speed
									Dynamic	Static	Grease	Oil
									Dynamic	Static	Grease	Oil
	mm	inch	mm	inch	mm	inch	mm	inch	C	C_O	r/min	r/min
604	4	0.1575	12	0.4724	4	0.1575	0.2	0.008	0.97	0.36	43000	51000	0.002
605	5	0.1969	14	0.5512	5	0.1969	0.2	0.008	1.33	0.505	39000	46000	0.0035
606	6	0.2362	17	0.6693	6	0.2362	0.3	0.012	2.24	0.91	28000	36000	0.008
607	7	0.2756	19	0.7480	6	0.2362	0.3	0.012	2.24	0.91	28000	36000	0.008
608	8	0.3149	22	0.8661	7	0.2756	0.3	0.012	3.35	1.4	26000	34000	0.012
609	9	0.3543	24	0.9449	7	0.2756	0.3	0.012	3.4	1.45	22000	30000	0.014
6000	10	0.3937	26	1.0236	8	0.3150	0.3	0.012	4.55	1.96	20000	28000	0.019
6001	12	0.4724	28	1.1024	8	0.3150	0.3	0.012	5.1	2.39	19000	26000	0.021
6002	15	0.5906	32	1.2598	9	0.3543	0.3	0.012	5.6	2.84	18000	24000	0.03
6003	17	0.6693	35	1.3780	10	0.3937	0.3	0.012	6.8	3.35	17000	22000	0.039
6004	20	0.7874	42	1.6535	12	0.4724	0.6	0.024	9.4	5.05	15000	19000	0.069
6005	25	0.9843	47	1.8504	12	0.4724	0.6	0.024	10.1	5.85	13000	17000	0.08
6006	30	1.1811	55	2.1654	13	0.5118	1.0	0.039	13.2	8.3	12000	15000	0.116

Other Technical Data of Ball Bearings

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)

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
11)0.6	2.5	0	-7	9	7	5	5	5	0	-40	12
2.5	10	0	-7	9	7	5	5	6	0	-120	15
10	18	0	-7	9	7	5	5	7	0	-120	20
18	30	0	-8	10	8	6	6	8	0	-120	20
30	50	0	-10	13	10	8	8	10	0	-120	20
50	80	0	-12	15	15	9	9	10	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	-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)

Inner Ring									Tolerance in um/s
d mm		Δdmp		Vdp²)Diameter Series		Vdmp	Kia	Sd	Sis³⁾	ΔBs	Vbs
d mm		Δdmp		9	0,1,2,3,4	Vdmp	Kia	Sd	Sis³⁾	ΔBs	Vbs
over	including	high	low	max		3	max	max	max	High	Low	max
1)0.6	2.5	0	-5	5	4	3	4	7	7	0	-40	5
2.5	10	0	-5	5	4	3	4	7	7	0	-40	5
10	18	0	-5	5	4	3	4	7	7	0	-80	5
18	30	0	-6	6	5	3	4	8	8	0	-120	5
30	50	0	-8	8	6	4	5	8	8	0	-120	5
50	80	0	-9	9	7	5	5	8	8	0	-150	6

Outer Ring									Tolerance in um/s
D mm		Δdmp		Vdp²)Diameter Series		Vdmp	Kia	SD⁴⁾ SD1⁵⁾	Sea⁴⁾⁵⁾	ΔBs		Vbs
D mm		Δdmp		9	0,1,2,3,4	Vdmp	Kia	SD⁴⁾ SD1⁵⁾	Sea⁴⁾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

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

Maximum Vibration Acceleration of Single Bearing

D	Diameter Series(0)				Diameter Series(2)					Diameter Series(3)
mm	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3	Z4	Z	Z1	Z2	Z3	Z4
3	35	34	32	28	36	35	32	30	-	37	36	33	31	-
4	35	34	32	28	36	35	32	30	-	37	36	33	31	-
5	37	36	34	30	38	37	34	32	-	39	37	35	33	-
6	37	36	34	30	38	37	34	32	-	39	37	35	33	-
7	39	38	35	31	40	38	36	34	-	-	-	-	-	-
8	39	38	35	31	40	38	36	34	-	-	-	-	-	-
9	41	40	36	32	42	40	37	35	-	-	-	-	-	-
10	43	42	38	33	44	42	39	35	30	37	44	40	37	32
12	44	43	39	34	45	43	39	35	30	47	45	40	37	32
15	45	44	40	35	46	44	41	36	31	48	46	42	38	33
17	46	44	40	35	47	45	41	36	31	49	47	42	38	33
20	47	45	41	36	48	46	42	38	33	50	48	43	39	34
22	47	45	41	36	48	46	42	38	33	50	48	43	39	34
25	48	46	42	38	49	47	43	40	36	51	49	44	41	37
28	49	47	43	39	50	48	44	41	37	52	50	45	42	38
30	49	47	43	39	50	48	44	41	37	52	50	45	42	38
32	50	48	44	40	51	49	45	42	38	53	51	46	43	39
35	51	49	45	41	52	50	46	43	39	54	52	47	44	40
40	53	51	46	42	54	52	47	44	40	56	54	49	45	41
45	55	53	48	45	56	54	49	46	43	58	56	51	47	44
50	57	54	50	47	58	55	51	48	45	60	57	53	49	46
55	59	56	52	49	60	57	53	50	47	62	59	54	51	48
60	61	58	54	51	62	59	54	51	48		61	56	53	50

Product Tags:

Customized 688 ZZ Bearing

Chrome Steel 688 2RS Bearing

688 2RS Bearing C3

Customized Bearing Chrome Steel 688 2RS Bearing C2 C0 C3 C4 Images

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