Name: 6700 Series
Rating: 5 (99 reviews)

6700 Series

6700 Series Deep Groove Ball Bearing is a rolling bearing used in a wide range of applications. Its inner diameter is 10mm, outer diameter is 15mm, and thickness is 3mm (some say 4mm). This type of bearing has the characteristics of low friction resistance and high rotation speed, and can withstand radial load or combined load acting simultaneously in radial and axial directions. It has a simple structure and is easy to use. It is mainly used in mechanical equipment such as small-power motors, automobile and tractor gearboxes, and machine tool gearboxes.

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The 6700 Series deep groove ball bearings are extra-small, thin-section bearings designed for applications where space is extremely limited and high rotational speeds are required. Manufactured from high-carbon chromium steel (GCr15), these bearings feature precision-ground raceways and high-grade steel balls that deliver smooth, low-friction operation. The thin-section design reduces overall assembly weight and envelope size without compromising load-carrying capability. 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 for maintenance-free operation. Operating temperature ranges from -30°C to +120°C. Typical applications include miniature motors, medical devices, robotics, and precision instrumentation where compact design and reliability are essential.

Thin section design

Minimal cross-section reduces overall assembly weight and envelope size while maintaining reliable load capacity.

High speed capability

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

Versatile sealing

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 d4mm - 16mm

Outer diameter D10mm - 32mm

Width B3mm - 8mm

Dynamic load C0.6kN - 3.8kN

Static load C00.3kN - 2.2kN

Limiting speed (grease)18000 - 48000 rpm

Limiting speed (oil)24000 - 60000 rpm

Internal clearanceC0 / C3

Sealing optionsOpen / ZZ / 2RS

MaterialGCr15 / SAE 52100

Application scenarios

Miniature motors

DC motors for drones, camera gimbals, and portable electronics requiring compact high-speed bearings.

Medical devices

Dental handpieces, surgical instruments, and diagnostic equipment requiring precision rotation.

Robotics

Joint actuators, sensor pivots, and end-effector mechanisms in compact robotic systems.

Office equipment

Printers, scanners, and paper handling systems requiring low-friction rotating components.

Technical inquiries

What is the difference between 6700 and 6800 series bearings?

The 6700 series has a thinner cross-section than the 6800 series for the same bore diameter. The 6700 series is designed for applications where radial space is extremely limited, while the 6800 series offers slightly higher load capacity with a thicker section.

What is the recommended mounting method for 6700 series bearings?

Due to their thin section, 6700 series bearings require careful mounting. Apply pressure evenly to the ring being fitted using a press with appropriate support sleeves. Avoid impact forces that could deform the thin rings.

Can 6700 series bearings be used in high-humidity environments?

Yes, the 2RS sealed versions provide effective protection against moisture ingress. For extreme humidity conditions, consider bearings with enhanced corrosion-resistant coatings or stainless steel variants.

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.

Shaft tolerance

Recommended shaft tolerance is j5 or k5 for most applications. Due to thin section, avoid excessive interference fits that may distort the bearing.

Bearing Designation	Dimension（mm）				Basic load ratings (kN)		Speed ratings(rpm)		Weight
Bearing Designation	d	D	B	rs min	Cr	Cor	Grease	Oil	(Kg)
6700	10	15	3	0.1	1.01	0.555	3600	4200	0.0015
6701	12	18	4	0.2	0.93	0.53	8300	9500	0.002
6702	15	21	4	0.2	0.94	0.585	6600	7600	0.0025
6703	17	23	4	0.2	1	0.66	5000	6700	0.0025
6704	20	27	4	0.2	1.04	0.73	5000	5700	0.0045
6705	25	32	4	0.2	1.1	0.84	4000	4600	0.005
6706	30	37	4	0.2	1.14	0.95	3300	3800	0.006

6700 Series

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