Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand	HRB (Harbin)
Model Series	6300 Series (6306-6310)
Bearing Type	Deep Groove Ball Bearing
Material	Chrome Steel (GCr15)
Seal Options	2Z, 2RZ, Z, RS
Precision Grade	P0 (ABEC-1)
Internal Clearance	C3 (Standard)
Cage Material	Steel Stamped
Lubrication	Pre-lubricated with Grease
Country of Origin	China

5 reviews

Anonymous

Apr 14, 2026

Rating: 4/5

Standard specifications

Dimensions match ISO standards exactly. No issues with installation. Would prefer if grease type was specified on the box.

Anonymous

Mar 16, 2026

Rating: 4/5

Good value for industrial use

Works well for general machinery applications. One unit had a slight noise initially but smoothed out after running. Good price point.

Anonymous

Mar 02, 2026

Rating: 5/5

Reliable for heavy duty

Using these 6310 bearings on a conveyor system. They handle the load well and the seals keep contaminants out effectively.

Anonymous

Feb 25, 2026

Rating: 5/5

Genuine HRB quality

Ordered the 6308-2RS for a motor repair. Fits perfectly on the shaft and housing. Rotation is smooth and packaging indicated authentic HRB branding.

Anonymous

Jan 27, 2026

Rating: 5/5

Fast shipping and authentic

Needed these urgently for a production line downtime. Arrived quickly and were clearly genuine HRB products with proper labeling.

5 FAQ

Q: Are these bearings pre-lubricated or do I need to add grease?

A: Yes, these bearings come pre-lubricated with standard industrial grease suitable for most applications.

Q: Do you offer bulk discounts for orders over 50 units?

A: Yes, we offer tiered pricing for bulk orders. Please contact our sales team directly for a quote on quantities over 50.

Q: Is the bore size standard for the 6300 series?

A: Yes, all bearings follow ISO standard dimensions for the 6300 series. Please check the specific model number for exact bore, OD, and width.

Q: What is the difference between 2Z and 2RS seals?

A: 2Z indicates metal shields on both sides, while 2RS indicates rubber contact seals on both sides. 2RS offers better protection against dust and moisture.

Q: Can these handle high RPM applications?

A: They are suitable for standard motor speeds. For very high RPM applications, please consult the load and speed charts for the specific model number.

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