688zz bearings-628zz Miniature sealed Deep Groove Ball Bearing-JRZC BEARING

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ball bearing 688zz

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Miniature Deep Groove Ball Bearing

Available base models: 604/605/606/607/608/609/623/624 /625/626/627/628/629/634/635/689 Available machining dimensions: Inner diameter≥80mm / Outer diameter≤1500mm Available product accuracy grades: P0, P6, P5, Z1V1, Z2V2 Available retainer types: Machined Brass Retainer / Steel Sheet Stamped Retainer Available product structure: Open Type / With Dust Cover Type (Z , 2Z) / With Seal Ring Type (RS , 2RS）

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Miniature Deep Groove Ball Bearing

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Product Database

Product Detail

688 bearing has the difference between closed type and open type.

The open type has no cover on both sides of the bearing, which is directly indicated by 688;

the closed type has a cover on both sides, and the cover has a dust cover (indicated by 688ZZ) and a rubber seal cover. (Expressed by 688-2RS) Two kinds.

Model	688 RS
Type	Deep groove ball bearing
Material	Chrome steel Gcr15
Bore size	8mm
Outer diameter	16mm
Width	5mm
Ball number	9
Speed	36000r/min
Dynamic load bearing	1.064kN
Static load bearing	0.477kN
Number of row	Single row
Warranty	12months

Feature

688ZZ bearing with dust cover

● dust-proof

● High temperature resistance

688-2RS Rubber Sealed Cover Bearing

● Dust proof and waterproof

● Under the same conditions, the noise is lower than that with a dust cover.

Clearance

In accordance with the standard of IS005753, radial Clearance can be divided into five groups. Radial Clearance Value without load See.

Radial Clearance of Deep-groove Ball Bearing
Bore Diameter		Group2		Normal Group		Group3		Group4		Group5
(mm)		Group2		Normal Group		Group3		Group4		Group5
Over	Incl	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
2.5	6	0	7	2	13	8	23	-	-	-	-
6	10	0	7	2	13	8	23	14	29	20	37
10	18	0	9	3	18	11	25	18	33	25	45
18	24	0	10	5	20	13	28	20	36	28	48
24	30	1	11	5	20	13	28	23	41	30	53
30	40		1	6	20	15	33	28	46	40	64
40	50	1	1	6	23	18	36	30	51	45	73
50	65	1	15	8	28	23	43	38	61	55	90
65	80	1	15	10	30	25	51	46	71	65	105
80	100	1	18	12	36	30	58	53	84	75	120

Note: Group2 Clearance only for Bearing over 6 Grade Accuracy.

Rust resisting

Bearing should normally be put under the p protected condition then it is to be stored and preserved. The longest period is one year. If there is half a year over the preservation period. At the time before the expiring date of rust resisting you have to check it over according to the stipulation to berust resisted again so as to keep the bearing not rusty.

Grease

General purpose grease No. and function
Company Brand	DesignationNo.	Dropping Tem.℃	Work Penetration at25℃	Working Tem.℃
Shell	Alvania RL2	185	265～295	-35~120
	Alyania RLQ2	195	265~295	-25～120
	Alvania R3	185	220~250	-35～135
	Alvania Ep1	180	310～340	-25～110
	Alvania Ep2	185	265～295	-25~110
	Alvania RA	180	250～275	-25～100
	Darina Ep2	250	265~295	-25～150
	Darina 2	250	265~295	-25～150
	Doliumr R2	282	265-295	-35～150
Chevron	SRL-2	240	225～280	-30~175
Sinopec	HAS	206	280	-40～130
	HTHS	300	281	-40～200
	TSA	192	280	-50～150
	Hangu 2	198	265～295	-20～120
Mobil	Mobil EP2	180	305～350	-10～120
	Mobil XHP222	280	281	-29～177
	Mobil 28	260	265～295	-55~175
	Mobil 48	260	240～270	60～170
Kyodo Yushi	Raremax super	190	260	40～170
	SRL	185	225~245	-40～145
	PS2	190	250～275	50～150
	ET150	260	255～280	-10～160
Eseeo Exxon	Andok C	260	190～210	-30～140
	Beacon 325	190	255~280	-54～120
	Polyrex EM	288	305～340	-30～180
	Polyrex Ep2	280	280～310	40～180
KLuber	Lsofex LDS18	190	255～280	-50～110
KLuber	Lsoflex NBU15	250	255～280	-30～120

Packing

Gene rally Bearing is to be packed into the medium-sized paper Box(50 sets or 100 sets).

Then all to be the carton as the external packing Small.

The users who have any requirements in packing may write them down in the contract.

Shandong-Yongjie-Bearing-Manufacturing-Co-Ltd- (28).jpg

Application

Miniature Deep Groove Ball Bearing bearings are mainly used in motors, electronic accessories, trolleys, skateboards, roller skates and other small machinery.

Model Table

Product Detail

Bearing selection material

The inner part of the bearing is composed of outer ring, cage, dust cover/seal ring and steel ball. The JRZC bearing ring and steel ball are made of refined bearing steel Gcr15,

and the cage is made of brass or high-quality cold-rolled steel. It can be made of reinforced engineering plastics, and the dust cover is made of imported special materials.

Bearing products produced:

miniature size: 602 603 604 605 606 607 608 609 623 624 625 626 627 628 629

Nonstandard: MR series and other models

Normal model: 60 series, 62 series, 63 series, 68 series, 69 series, 1600 series, 67 series

Heat treatment:

professional and advanced heat treatment equipment and international synchronous heat treatment process to ensure bearing hardness and wear resistance

Bearing accuracy refers to dimensional accuracy and rotational accuracy. Such as P0.P6.P5.P4.P2

688zz bearing has the difference between closed type and open type.

The open type has no cover on both sides of the bearing, which is directly indicated by 688;

the closed type has a cover on both sides, and the cover has a dust cover (indicated by 688ZZ) and a rubber seal cover. (Expressed by 688-2RS) Two kinds.

Miniature Deep Groove Ball Bearing Structure

Model	688 RS
Type	Deep groove ball bearing
Material	Chrome steel Gcr15
Bore size	8mm
Outer diameter	16mm
Width	5mm
Ball number	9
Speed	36000r/min
Dynamic load bearing	1.064kN
Static load bearing	0.477kN
Number of row	Single row
Warranty	12months

Feature

688ZZ bearing with dust cover

● dust-proof

● High temperature resistance

688-2RS Rubber Sealed Cover Bearing

● Dustproof and waterproof

● Under the same conditions, the noise is lower than that with a dust cover.

Clearance

In accordance with the standard of IS005753, radial Clearance can be divided into five groups. Radial Clearance Value without load See

Radial Clearance of Deep-groove Ball Bearing
Bore Diameter		Group2		Normal Group		Group3		Group4		Group5
(mm)		Group2		Normal Group		Group3		Group4		Group5
Over	Incl	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
2.5	6	0	7	2	13	8	23	-	-	-	-
6	10	0	7	2	13	8	23	14	29	20	37
10	18	0	9	3	18	11	25	18	33	25	45
18	24	0	10	5	20	13	28	20	36	28	48
24	30	1	11	5	20	13	28	23	41	30	53
30	40		1	6	20	15	33	28	46	40	64
40	50	1	1	6	23	18	36	30	51	45	73
50	65	1	15	8	28	23	43	38	61	55	90
65	80	1	15	10	30	25	51	46	71	65	105
80	100	1	18	12	36	30	58	53	84	75	120

Note: Group2Clearance only for Bearing over 6 Grade Accuracy

Rust resisting

Bearing should normally be put under the p protected condition then it is to be stored and preserved. The longest period is one year. If there is half a year over the preservation period . At the time before the expiring date of rust resisting you have to check it over according to the stipulation to berust resisted again so as to keep the bearing not rusty.

Packing

Gene rally Bearing is to be packed into the medium-sized paper Box(50 sets or 100 sets).

Then all to be the carton as the external packing Small.

The users who have any requirements in packing may write them down in the contract.

Shandong-Yongjie-Bearing-Manufacturing-Co-Ltd- (28).jpg

Grease

General purpose grease No. and function
Company Brand	DesignationNo.	Dropping Tem.℃	Work Penetration at25℃	Working Tem.℃
Shell	Alvania RL2	185	265～295	-35~120
	Alyania RLQ2	195	265~295	-25～120
	Alvania R3	185	220~250	-35～135
	Alvania Ep1	180	310～340	-25～110
	Alvania Ep2	185	265～295	-25~110
	Alvania RA	180	250～275	-25～100
	Darina Ep2	250	265~295	-25～150
	Darina 2	250	265~295	-25～150
	Doliumr R2	282	265-295	-35～150
Chevron	SRL-2	240	225～280	-30~175
Sinopec	HAS	206	280	-40～130
	HTHS	300	281	-40～200
	TSA	192	280	-50～150
	Hangu 2	198	265～295	-20～120
Mobil	Mobil EP2	180	305～350	-10～120
	Mobil XHP222	280	281	-29～177
	Mobil 28	260	265～295	-55~175
	Mobil 48	260	240～270	60～170
Kyodo Yushi	Raremax super	190	260	40～170
	SRL	185	225~245	-40～145
	PS2	190	250～275	50～150
	ET150	260	255～280	-10～160
Eseeo Exxon	Andok C	260	190～210	-30～140
	Beacon 325	190	255~280	-54～120
	Polyrex EM	288	305～340	-30～180
	Polyrex Ep2	280	280～310	40～180
KLuber	Lsofex LDS18	190	255～280	-50～110
KLuber	Lsoflex NBU15	250	255～280	-30～120

Application

Miniature Deep Groove Ball Bearing bearings are mainly used in motors, electronic accessories, trolleys, skateboards, roller skates and other small machinery.

Application