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6806 Deep Groove Ball Bearing 30x42x7mm

Name: 6806 Bearing | Thin-Section Ball Bearing 30x42x7mm | Yuanhe
Brand: YUANHE
Availability: InStock
Rating: 4.9 (28 reviews)

A 30mm shaft with a 42mm housing envelope. The 6806 bearing fits where no other standard deep groove bearing can: 6mm ring cross-section, 7mm width, 4.94 kN dynamic load. Three seal configurations from a GCr15 chrome steel platform at ABEC-3 precision.

Key Specifications

Sealing: Open (11,000 RPM), ZZ (11,000 RPM, non-contact metal shields), 2RS (~8,800 RPM, NBR contact seals).
Load: 4.94 kN dynamic (Cr), 3.65 kN static (Cor). A 6006 bearing at 30mm bore carries 13.2 kN but needs a 55mm housing bore.
Speed: 11,000 RPM (Open/ZZ) with polyurea grease. The 6mm ring section minimizes rotating mass for the 30mm bore scale.
Temperature: -20C to 120C (standard grease). 150C with ester-based grease (OEM).
Material: GCr15 chrome steel. 440C stainless steel. Hybrid ceramic (Si3N4).

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For any inquiries, please contact with our Supporting Team at sales@yuanhecd.com.

6806 Bearing

Bore x OD x Width

30x42x7 mm

Dynamic Load (Cr)

4.94 kN

Static Load (Cor)

3.65 kN

Max Speed

11,000 RPM

Ring Section

6 mm

Sealing

Open / ZZ / 2RS

695 ZZ miniature deep groove ball bearing 5x13x4mm double metal shielded

Model	6806
Type	Open / Shielded / Sealed
Bore Dia.	30 mm
Outside Dia.	42 mm
Width	7 mm
Ring Section	6 mm
ABEC Tolerance	ABEC-3
Dynamic Load Capacity	4.94 kN
Static Load Capacity	3.65 kN
Max. RPM	11,000 RPM
Temp. Range	-20~120 C
Material	GCr15 Chrome Steel
Seal / Shield Material	NBR rubber (2RS) / SPCC steel (ZZ)
Lubrication	Polyurea grease (standard)

Sealing and Lubrication

The 6806 Open bearing delivers 11,000 RPM with zero seal friction. Accepts oil-mist lubrication through the exposed ball path. Specified for gearboxes, oil-bath pumps, and motor end bells where the enclosure already blocks contaminants. Open configuration supports in-situ re-greasing for machinery with scheduled maintenance intervals.

The 6806 ZZ bearing uses SPCC steel shields with a non-contact labyrinth gap. Full 11,000 RPM with factory-filled polyurea grease. Shields block coarse particles and splashes while adding no friction. Default choice for enclosed fan motors, power tool gear trains, and belt-driven machinery in clean housings.

The 6806 2RS bearing uses NBR rubber contact seals. Positive exclusion of fine dust, moisture, and direct spray. Speed reduces to ~8,800 RPM due to seal lip friction at the 30mm bore scale. Specified for outdoor power equipment, agricultural sprayers, and conveyor rollers where the bearing faces direct water exposure.

Performance

At 4.94 kN dynamic load, the 6806 bearing carries a 30mm shaft in a 42mm envelope. The 6006 bearing fits the same shaft but needs a 55mm housing bore with 13mm more OD, carrying 13.2 kN dynamic. The 6906 bearing splits the middle at 30x47x9mm with 7.28 kN dynamic. If the housing bore is fixed at 42mm, the 6806 bearing is the only standard deep groove option. The 7mm width is shared with the 6807 bearing; the 6806 bearing trades 5mm of bore for 5mm less OD at the same axial envelope.

ABEC-3 radial runout of 0.013mm is standard. The 6mm ring section is the thinnest in the 6800 series alongside the 6807 bearing. Housing circularity directly affects running noise and fatigue life. For 30mm shafts above 8,000 RPM, specify the housing bore to H6 tolerance with circularity within 0.010mm.

OEM and Customization

Clearance: C2 for precision spindles and low-noise equipment. C3 (standard). C4 for high-temperature housings

Grease: Low-noise polyurea (3-5 dB reduction). Ester-based for 150C continuous. NSF H1 food-grade

Cage: Pressed steel (standard). Glass-reinforced polyamide for reduced weight. Brass machined for vibration above 5g

Material: 440C stainless steel for wet service. Hybrid ceramic (Si3N4) for electrical insulation and speeds above 13,000 RPM

MOQ 500 pcs for modified clearance or custom grease. Submit your bearing drawing for a quote.

Applications

Compact gearbox intermediate shafts

Electric power tool armatures

Belt tensioner and idler pulleys

Condenser fan motors

Hydraulic pump cartridge housings

Robotic joint drives

Agricultural sprayer pumps

Food-processing line bearings

Textile machinery shafts

Light conveyor rollers

Frequently Asked Questions

How does the 6806 bearing compare to a 6006 bearing? +

Both fit a 30mm shaft. The 6806 bearing measures 30x42x7mm with 4.94 kN dynamic load. The 6006 bearing measures 30x55x13mm with 13.2 kN dynamic. The 6006 bearing needs a 13mm larger housing bore and nearly double the axial space. If the housing bore is fixed at 42mm, the 6806 bearing is the only standard deep groove option. If the housing can accept 55mm, the 6006 bearing provides the load margin. Contact us with your envelope constraints.

What is the difference between a 6806 bearing and a 6906 bearing? +

The 6906 bearing measures 30x47x9mm and carries 7.28 kN dynamic; roughly 47% more than the 6806 bearing. The 6906 ring cross-section is 8.5mm versus 6mm for the 6806 bearing. The 6906 bearing needs a 5mm larger housing bore and 2mm more axial space. Choose the 6806 bearing when the 42mm OD is a hard constraint. Choose the 6906 bearing when the load exceeds 4.94 kN but the housing can accept 47mm.

Where does a 30mm shaft with only 42mm OD space typically occur? +

This tight envelope appears in compact gearbox intermediate shafts where multiple bearing seats share a common housing wall thickness of 5-8mm. Robotic joint drives are another case: the harmonic drive output bearing and the motor shaft bearing compete for radial space inside a joint housing that must fit within the robot arm profile. Power tool gear trains face the same constraint where the tool grip diameter limits the gear housing OD, and a 30mm shaft with 42mm bearing OD leaves just enough wall thickness for structural integrity.

Does the 6806 bearing have the same 6mm ring section as the 6807 bearing? +

Yes. Both share a 6mm radial ring cross-section. The difference is that the 6806 bearing applies this section at 30mm bore (42mm OD), while the 6807 bearing applies it at 35mm bore (47mm OD). The 6807 bearing gains 5mm bore and 5mm OD while keeping the same 6mm section and 7mm width. The 6806 bearing benefits from the smaller pitch circle diameter: at the same RPM, ball orbital velocity is lower, which contributes to the 6806 bearing having a higher speed rating (11,000 vs 9,500 RPM for the 6807 bearing in Open configuration).