Motorcycle Bearing Deep Groove Ball Bearings 6904 6004 6204 6304 61805 6905 6005 6205 6305 6006 6007 6207-2RS 6307zz 6313 Used for Motorcycle Wheel Crankshaft

• Customization: Available
• Package: Plastic Tube or Single Box
• Precision: P0 P6 P5
• Model NO.: 6904 6004 6204 6304 61805 6905 6005 6205 6305
• Transport Package: Single Box
• Specification: small
• Trademark: UJK
• Origin: China
• HS Code: 848210
• Production Capacity: 600000

Product Description

 

Technical Brief: UJK Motorcycle Bearings

1. Function & Key Features
UJK bearings are precision components designed to support rotating shafts in motorcycles, reducing friction, ensuring alignment, and enhancing durability under high-speed, high-load, and variable-temperature conditions. Key features include:

• Material: High-carbon chromium steel (e.g., SUJ2) or stainless steel for corrosion resistance1.

• Sealing: Options like 2RS (double rubber seals) or ZZ (metal shields) prevent contamination from dust/moisture1.

• Precision: Tolerance classes up to P4 (ISO standard) for reduced vibration and noise1.

• Special Designs: Angular contact bearings (e.g., AC) handle combined radial/axial loads; tapered rollers (e.g., 30200 series) suit wheel hubs1.

2. Model Identification System
UJK follows ISO/ABMA bearing codes. A typical model (e.g., 6205-2RS/C3) is decoded as:

• Basic Code:

  • 6: Type (e.g., 6 = Deep Groove Ball Bearing).

  • 2: Dimension series (width/diameter profile, e.g., 2 = light series).

  • 05: Bore size = 05×5 = 25 mm (for codes ≥04, multiply by 5)12.

• Suffixes:

  • -2RS: Double rubber seals.

  • /C3: Radial clearance > standard (suits thermal expansion)1.

3. Size-to-Model Conversion
To identify a UJK model from dimensions:

1. Bore Diameter (d):

   • If 20-480 mm, calculate: d = Last two digits of model × 5 (e.g., 05 → 25 mm)2.

   • For d < 20 mm: 00=10 mm, 01=12 mm, 02=15 mm, 03=17 mm1.

2. Outer Diameter (D) & Width (B): Cross-reference with dimension tables (no direct formula)23.
   Example: A bearing with d=25 mm, D=52 mm, B=15 mm corresponds to 62052.

4. Motorcycle-Specific Design

• High RPM: Cage designs (e.g., brass M or polymer T) minimize centrifugal force1.

• Load Capacity: Cylindrical roller bearings (e.g., NU, NJ series) for drive sprockets; thrust bearings for clutch assemblies1.

• Temperature: Suffixes like X28 (200°C limit) for exhaust/crankcase areas1.

 

UJK Motorcycle Bearing Model Reference Table

The following models cover critical motorcycle applications. Dimensions adhere to ISO standards.

Model	Type	Dimensions (mm) d×D×B	Key Features	Common Applications
6200-2RS	Deep Groove Ball Bearing	10×30×9	Double rubber seals; moderate load	Small gearbox shafts
6302-ZZ	Deep Groove Ball Bearing	15×42×13	Double metal shields; low friction	Alternator, coolant pump
7205B	Angular Contact Ball Bearing	25×52×15	40° contact angle; axial rigidity	Steering head races
30205 J	Tapered Roller Bearing	25×52×16.25	ISO-compliant cone; high radial load	Rear wheel hubs
NKIS 20	Needle Roller Bearing	20×26×20 (caged)	Compact; high radial capacity	Connecting rods, swingarms
NA 4901	Needle Roller Bearing	12×24×12 (full complement)	No cage; max rollers; impact-resistant	Transmission gears
51105	Thrust Ball Bearing	25×42×11	Axial load support; flat washers	Clutch pressure plates

Notes:

• Suffix Guide: RS = rubber seal, ZZ = metal shield, B = 40° contact angle, J = ISO cone, C3 = enlarged clearance1.

• Customization: UJK offers HN (stainless steel) for wet environments, /P6 (higher precision) for racing crankshafts1.

 

Practical Tips for Model Selection

1. Verify Load Directions:

   • Radial loads (e.g., wheels) → Deep groove (62xx) or cylindrical rollers (NJxx).

   • Combined loads (e.g., steering) → Angular contact (72xxB) or tapered rollers (302xx)1.

2. Check OEM Specs: Match clearance (e.g., /C3 for engines) and tolerance (e.g., /P5 for gearbox)1.

3. Use Digital Tools: Input dimensions into UJK's online catalog (e.g., search by d×D×B) for exact matches3.

 

Motorcycle bearings		Size(mm)				Load N		Speed(rpm)			Sued.ON
UJK								Grease		Oil
Open	Seal	d	D	B	rsmin	Cr	Cor	2RZ	2RS
	638-Z/P6	8	28	9	0.3	4370	1977				50
6001		12	28	8	0.3	5100	2370	28000	18000	32000	150
6001/P6											157
6001/P 53Z2											160
6201			32	10	0.6	6800	3050	22000	17000	28000	50,100
6201/P6											50
6201-P5											HN169M
6301			37	12	1	9700	4200	20000	16000	24000	153
16002/P6		15	32	8	0.3	5600	2830	24000	-	28000	Convex axle
6002			32	9	0.3	5600	2830	24000	15000	28000	153
	6002-RS/P5										157
6202			35	11	0.6	7650	3750	20000	14000	24000	153
6202/P5											HN169M
	6202-RS/P6										247
	6202-2Z/P6										157
6302/P5			42	13	1.0	114000	5450	17000	13000	20000	2V49
16003		17	35	8	0.3	6000	3250	22000	-	26000	100
16003/P6											100
6003			35	10	0.3	6000	3250	22000	13000	26000	50
6003/P6											50
6003/P5											2V49
	6003-2RS/P6										50
6203			40	12	0.6	9550	4800	17000	12000	20000
6203/P5											HN169M
	6203X/P53Z2		42	13	0.6	9550	4800	17000	12000	20000	141QMB (bent axle)
6303/P5			47	14	1	13600	6650	15000	11000	18000
6004		20	42	12	0.6	9400	5000	18000	11000	20000
6004/P6
6004/P53Z2											45QDC (bent axle)
6004/P5											HN169, 2V49
	6004-2RS/P6										50
	6004-2RS/P5										169
6204		20	47	14	1	12800	6600	15000	11000	18000	100,125,150
6204/P6											157
6204/P5											160
6204/P53											50
6204/P53Z2											50
	6204-RS/P6										247
68304*2			52	12	1.1	16004	7938	14000	10000	17000
6304			52	15	1.1	15900	7900	14000	10000	17000
6304/P6
6304/P53Z2											150
	62/22X1-RS/P53Z2	22	47	14	1	12900	6800	14000	9500	16000	253
62/22/YA5			50	14	1	12900	6800	14000	9500	16000	253
	62/22YA5-2RS										253
63/22X2JD251			56	15	1	20700	10426	1300	9500	16000	153
61805		25	37	7	0.3	4500	3150	18000	10000	22000	153
6005/P5			47	12	0.6	10100	5850	15000	9500	18000	2V49
	6005-2RS/P6
6205/P5			52	15	1	14000	7850	13000	9000	15000	50
6205/P53Z2											Ax100
6305/P5			62	17	1.1	20600	11200	11000	8000	13000
6305/P54Z2											247
	6305X2-Z/P53Z2		62	16	1.1	20600	11200	11000	8000	13000	153-3 (bent axle)
62/28		20	58	16	1.0	17915	9798	12000	8000	14000	157
63/28			68	18	1.1	26700	14000	10000	7500	13000	157
63/28Y A5/P5											157
	63/28-RS										157
	63/28-RS/ YA5P53Z2										157
6006/P6		30	55	13	1.0	13200	8300	13000	8000	15000	157
6007/P63Z2		35	62	14	1.0	16000	10300	11000	6700	13000
6007/P53Z2											153-4