Home > 6803 Deep Groove Ball Bearing 17x26x5mm

6803 Deep Groove Ball Bearing 17x26x5mm

When a 17mm shaft must fit within a 26mm OD housing, the 6803 bearing is the thinnest-section option in its bore class. At 17x26x5mm, it saves 4mm OD and 2mm width versus a 6903 bearing (17x30x7mm), trading load capacity for compactness.

Key Specifications

Configurations: Open, ZZ (metal shields), or 2RS (rubber contact seals).
Dynamic Load: 2.63 kN. Static Load: 1.46 kN. Speed: 28,000 RPM (open/ZZ), 22,000 RPM (2RS).
Load Direction: Radial plus moderate bidirectional axial, up to 10-20 percent of radial rating.
Temperature: -20 degrees Celsius to 120 degrees Celsius standard; to 150 degrees Celsius with high-temperature grease.
Precision: ABEC-1 standard; ABEC-3 available for tighter runout control.

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6803 Bearing

Model	6803
Bore (d)	17 mm
OD (D)	26 mm
Width (B)	5 mm
Type	Open / Shielded / Sealed
ABEC	ABEC-1 / ABEC-3
Dynamic Load	2.63 kN
Static Load	1.46 kN
Max Speed	28,000 RPM (open/ZZ)

The 6803 bearing is a thin-section deep groove ball bearing with 17mm bore, 26mm OD, and 5mm width. Available in open, ZZ (metal shields), and 2RS (rubber seals) configurations. At 2.63 kN dynamic load and 28,000 RPM in open/ZZ configuration, it suits compact mechanical designs where radial space and weight are constrained. The 2RS sealed variant derates to 1.70 kN and 19,000 RPM for contaminated environments.

Bore x OD x Width

17 x 26 x 5 mm

Dynamic Load Cr

2.63 kN

Static Load Cor

1.46 kN

Max Speed

28,000 RPM

Sealing

Open / ZZ / 2RS

Precision

ABEC-1 / ABEC-3

Shielding and Lubrication

Three sealing configurations serve different environments. Open 6803 bearings run at 28,000 RPM with no seal friction, requiring external lubrication and a clean housing. ZZ bearings use non-contact SPCC steel shields pressed into the outer ring on both sides; they retain factory grease without adding drag, preserving full speed. 2RS bearings use nitrile rubber (NBR) lip seals that press against the inner ring, blocking moisture and fine dust at the cost of friction, lowering the speed ceiling to approximately 19,000 RPM.

At 5mm width, the 6803 bearing carries a smaller grease reservoir than wider-section bearings in the 17mm-bore family. The 2RS configuration retains lubricant longer when relubrication access is limited. ZZ or open configurations suit designs with accessible lubrication points where maximum speed is the priority.

Performance

Within the 17mm-bore bearing family, the 6803 bearing is the thinnest-section option. The 6903 bearing (17x30x7mm) reaches 4.60 kN dynamic load, a 75 percent increase, at the cost of 4mm additional OD and 2mm width. The 6003 bearing (17x35x10mm) delivers 6.80 kN but requires nearly double the OD cross-section. The 6803 bearing trades load capacity for compactness: 2.63 kN dynamic and 1.46 kN static in open or ZZ configurations. For 2RS sealed variants, dynamic load derates to 1.70 kN with speed capped at 19,000 RPM. When radial space is the binding constraint, the 6803 bearing is the correct pick.

OEM and Customization

Yuanhe manufactures 6803 bearings to customer specifications. Custom internal clearance grades C2, CN, and C3 are available for volume orders. Low-noise grease fills (V2 or V3 vibration class) support quiet-operation requirements in medical and office equipment. 440C stainless steel rings and balls provide corrosion resistance for food processing and washdown environments. Standard OEM lead time is 7 to 15 days. Send bearing dimensions or part number requirements to contact Yuanhe for a quote.

Applications

Bicycle hub bearings (front and rear)

Small electric motor rotors up to 0.5 kW

Office equipment (printers, scanners)

RC model gearboxes and drive shafts

Medical device positioning stages

HVAC damper actuators and fan shafts

Light automation idler pulleys

Small pump shafts

Frequently Asked Questions

What does ZZ mean on a 6803 bearing? +

ZZ indicates double metal shields (SPCC steel) pressed into the outer ring on both sides. These non-contact shields retain factory grease and block larger particles while adding zero friction. The 6803 ZZ bearing reaches the full 28,000 RPM speed rating, making it the right choice for clean, high-speed applications where contamination is not a primary concern.

What is the difference between a 6803 bearing and a 6903 bearing? +

The 6803 bearing measures 17x26x5mm. The 6903 bearing measures 17x30x7mm. The 6803 bearing saves 4mm in OD and 2mm in width at the cost of lower load capacity (2.63 kN vs 4.60 kN). Choose the 6803 bearing when the housing radial envelope is capped at 26mm. Choose the 6903 bearing when 30mm OD is available and higher load capacity is required.

Can a 6803 bearing handle axial loads? +

Yes. The deep groove geometry supports bidirectional axial loads at approximately 10 to 20 percent of the radial rating. For the open 6803 bearing rated at 2.63 kN radial, safe axial capacity is around 0.26 kN to 0.53 kN. This covers typical thrust from helical gears and belt tension on pulleys. For predominantly axial loads, specify a thrust bearing instead.

What clearance and material options are available for the 6803 bearing? +

Standard clearance is CN. C2 (tight) and C3 (loose) grades are available for volume orders. C3 is commonly specified for motor rotors where thermal expansion reduces clearance during startup. 440C stainless steel rings and balls are available for corrosion resistance in food processing and medical applications. Standard OEM lead time is 7 to 15 days. Contact Yuanhe with your specifications.