Custom 6300 Series Deep Groove Ball Bearing Manufacturers, Factory

6300 Series

6300 series deep groove ball bearings are a widely used rolling bearing type. It has a simple structure and is easy to achieve high precision. The bearing has an inner diameter of 10mm and an outer diameter of 35mm, and can withstand radial load, axial load or combined load. Due to its high rotational speed and durability, it is often used in applications such as leather processing equipment, wire stripping machines and chillers.

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DEEP GROOVE · SINGLE ROW · C3 CLEARANCE

6300 Series Deep Groove Ball Bearing

bore 10-50mm P0 / P6 / P5 ZZ / 2RS

The 6300 Series deep groove ball bearings are versatile, high-performance components designed for a wide range of industrial and automotive applications. Manufactured from high-carbon chromium steel (GCr15), these bearings feature precision-ground raceways and high-grade steel balls that deliver low friction torque and smooth operation at high rotational speeds. The deep raceway geometry enables the bearing to support radial loads as well as moderate axial loads in both directions. Available with metal shields (ZZ) for particle protection or rubber seals (2RS) for complete sealing against moisture and dust. Pre-lubricated with high-quality lithium grease, the 6300 series offers maintenance-free operation for extended service intervals. Operating temperature ranges from -30°C to +120°C, making these bearings suitable for electric motors, gearboxes, pumps, and conveyor systems across multiple industries.

Deep raceway geometry

Enhanced load-carrying capacity with support for both radial and moderate axial loads in either direction.

High-speed capability

Optimized internal geometry and precision-ground surfaces enable operation at elevated rotational speeds with minimal heat generation.

Versatile sealing options

Available in open, ZZ (metal shielded), or 2RS (rubber sealed) configurations to match specific environmental requirements.

Pre-lubricated

Factory-filled with high-quality lithium grease for maintenance-free operation across extended service intervals.

Technical specifications

Bore diameter d10mm - 50mm

Outer diameter D35mm - 90mm

Width B11mm - 20mm

Dynamic load C7.8kN - 28.5kN

Static load C04.2kN - 16.8kN

Limiting speed (grease)8000 - 22000 rpm

Limiting speed (oil)10000 - 28000 rpm

Internal clearanceC0 / C3 / C4

Sealing optionsOpen / ZZ / 2RS

MaterialGCr15 / SAE 52100

Application scenarios

Electric motors

Fractional to medium horsepower motors for industrial fans, pumps, and compressors.

Industrial gearboxes

Shaft support in reduction drives and power transmission systems.

Automotive components

Alternators, water pumps, and tensioner pulleys in passenger and commercial vehicles.

Agricultural machinery

Conveyor rollers and drive shafts in harvesters and tractors.

Power tools

Drills, grinders, and saws requiring compact high-speed bearings.

Textile machinery

Spindles and guide rollers in high-speed textile processing equipment.

Technical inquiries

What is the difference between ZZ and 2RS seals?

ZZ refers to metal shields on both sides, which protect against large particles but allow limited lubricant retention. 2RS refers to contact rubber seals on both sides, which provide complete sealing against moisture, dust, and contaminants, with better lubricant retention for extended service intervals.

What internal clearance should I choose for my application?

C0 (normal) suits standard operating temperatures between 20°C and 80°C. C3 is recommended when the temperature differential between inner and outer rings exceeds 15°C, or for interference fit applications. C4 is specified for extreme temperature conditions or heavy interference fits.

Can 6300 series bearings handle axial loads?

Yes, the deep raceway geometry enables 6300 series bearings to support moderate axial loads in both directions. Axial load capacity is approximately 30-50% of the radial load rating, depending on the specific size and operating conditions.

What is the recommended mounting procedure?

Apply force evenly to the ring being mounted. Use a press with appropriate support sleeves. Never apply impact force directly to the bearing. For interference fits, use an induction heater to expand the inner ring to 80-100°C before mounting.

Storage

Store in original anti-rust packaging in a cool, dry area with relative humidity below 60% and stable temperature.

Handling

Avoid dropping or striking the bearing. Use clean gloves during handling to prevent contamination from moisture and acids on hands.

Cleanliness

Ensure shaft and housing are free from burrs and metallic particles before installation. Contaminants significantly reduce service life.

Lubrication

Sealed variants are pre-lubricated for life. Open variants require grease or oil compatible with speed and temperature conditions.

Bearing Designation	Dimension（mm）				Basic load ratings (kN)		Speed ratings(rpm)		Weight
Bearing Designation	d	D	B	rs min	Cr	Cor	Grease	Oil	(Kg)
6301	12	37	12	1	9.7	4.2	20000	24000	0.06
6302	15	42	13	1	11.4	5.45	17000	21000	0.082
6303	17	47	14	1	13.6	6.55	15000	18000	0.115
6304	20	52	15	1.1	15.9	7.8	14000	17000	0.145
6305	25	62	17	1.1	22.4	11.5	11000	14000	0.232
6306	30	72	19	1.1	28.1	15.8	9500	12000	0.348
6307	35	80	21	1.5	33.4	19.2	8500	10000	0.458
6308	40	90	23	1.5	40.7	24	7500	9000	0.632
6309	45	100	25	1.5	52.8	31.8	6700	8000	0.848
6310	50	110	27	2	61.8	37.9	6000	7000	1.1
6311	55	120	29	2	71.6	44.8	5300	6300	1.399
6312	60	130	31	2.1	81.8	51.8	5000	6000	1.72
6313	65	140	33	2.1	93.8	60.5	4500	5600	2
6314	70	150	35	2.1	105	68	4300	5300	2.6
63/22	22	56	16	1.1	18.4	9.3	13000	15000	0.176

6300 Series

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