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609 Deep Groove Ball Bearing 9x24x7mm

At 9mm bore and 24mm OD, the 609 bearing delivers a 7.5mm radial cross-section: 2.5mm slimmer in OD than the 629 bearing (9x26x8mm) and 1mm wider than the 608 bearing (8x22x7mm). It fits where a 629 bearing OD pushes the housing wall too thin and a 608 bearing bore is one millimeter short.

Key Specifications

Sealing: Open, ZZ (metal shields), or 2RS (rubber seals). ZZ reaches full speed rating with non-contact protection.
Speed and Load: 36,000 RPM (open) with 3.35 kN dynamic and 1.40 kN static load. 2RS configuration rated to 28,000 RPM.
Radial Fit: 9mm bore, 24mm OD, 7mm width. 7.5mm radial cross-section; the narrowest 9mm-bore deep groove ball bearing in the 600 series.
Temperature Range: -20C to 120C with standard polyurea grease. 150C peak available with high-temperature lubricant on request.
Precision: Standard ABEC-1. ABEC-3 and ABEC-5 available for tighter bore and radial runout tolerances.

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609 Bearing | Deep Groove Ball Bearing 9x24x7mm

Model	609
Type	Open / Shielded / Sealed
Bore (d)	9 mm
OD (D)	24 mm
Width (B)	7 mm
Dynamic Load Cr	3.35 kN
Static Load Cor	1.40 kN
Max Speed	36,000 RPM (open) / 28,000 RPM (2RS)
ABEC	ABEC-3
Temperature Range	-20 to 120 deg C
Material	GCr15 (AISI 52100 equivalent)
Shield / Seal Material	SPCC steel (ZZ) / NBR rubber (2RS)
Lubrication	Grease

Bore x OD x Width

9 x 24 x 7 mm

Dynamic Load Cr

3.35 kN

Static Load Cor

1.40 kN

Max Speed

36,000 RPM

Sealing

Open / ZZ / 2RS

Precision

ABEC-3

Shielding and Lubrication

The 609 bearing ships in three sealing configurations. Open (no suffix) suits oil-bath and oil-mist lubricated housings where the lubrication system handles contamination control. ZZ shields use non-contact pressed-steel covers retained in the outer ring; they trap factory grease while adding zero friction, reaching the full 36,000 RPM rating. 2RS seals use nitrile rubber lips contacting the inner ring groove, blocking moisture and particulates at a reduced speed ceiling of approximately 28,000 RPM. The 2RS version ships pre-packed with polyurea grease and needs no field relubrication.

With a 7mm width and 24mm OD, the 609 bearing has enough cross-section that 2RS seal drag at 28,000 RPM consumes roughly 5 to 8 percent of available drive torque in small-frame motors. ZZ shields cut this to near zero. For sealed power tool motors running intermittent duty cycles where dust and moisture are present, 2RS is the standard choice. For continuous-duty fan motors in clean environments, open or ZZ saves power.

Performance

The 609 bearing carries 3.35 kN dynamic and 1.40 kN static load at 36,000 RPM in open configuration. Within the 9mm-bore family, the step from the 608 bearing (8x22x7mm, 2.89 kN dynamic) to the 609 bearing adds 0.46 kN dynamic load from 1mm more bore and 2mm more OD. The 609 bearing weighs approximately 14g per unit.

Compared to the 629 bearing (9x26x8mm, 4.55 kN dynamic), the 609 bearing gives up 1.20 kN of capacity but saves 2mm in housing diameter and 1mm in axial width. For a 9mm shaft motor where the stator bore sets the housing OD limit, the 609 bearing often avoids a frame size increase that the 629 bearing would require. When housing wall thickness at 26mm OD is acceptable and load is the driver, specify 629 bearing. When the 24mm OD is the hard constraint, the 609 bearing is the bearing that fits. For OEM deep groove ball bearing selection, envelope constraints determine the bearing series.

OEM and Customization

Yuanhe manufactures the 609 bearing to customer specifications beyond catalog dimensions. Common OEM requests for the 9mm-bore series include C3 radial clearance for electric motor applications with thermal expansion of the shaft, low-noise grease fills for office equipment and home appliance fans, and 440C stainless steel rings and balls for food processing and marine environments. Non-standard bore tolerances and custom cage materials are available against drawing. For OEM orders, send bearing dimensions or part number for a quote.

Applications

Small-frame AC and DC electric motors

Power tool armature shafts

Office equipment fans and copier drums

Home appliance blower motors

Electric scooter hub motors

Small pump impeller shafts

Treadmill roller bearings

HVAC damper actuators

Frequently Asked Questions

What is the difference between 609 bearing and 608 bearing? +

The 608 bearing has an 8mm bore, 22mm OD, and 7mm width with 2.89 kN dynamic load. The 609 bearing moves to a 9mm bore, 24mm OD, same 7mm width, and 3.35 kN dynamic load. The 1mm bore increase brings a 16 percent load capacity gain. If the shaft is 8mm, specify 608 bearing. If the shaft is 9mm, the 609 bearing is the direct fit without stepping up to the larger 629 bearing OD.

Can the 609 bearing handle combined radial and axial loads? +

As a deep groove ball bearing, the 609 bearing accepts axial loads up to approximately 25 to 30 percent of the unused radial capacity. With 3.35 kN dynamic radial rating, pure axial capacity is roughly 0.85 kN under light radial load. For sustained axial loading above 0.5 kN or combined loading where axial exceeds 30 percent of radial, consider a paired mounting arrangement. Contact Yuanhe with your load case for sizing assistance.

What internal clearance options are available for the 609 bearing? +

Standard clearance is CN (normal). C3 clearance is the most common upgrade for electric motor applications where the shaft heats up and expands during operation, reducing the running clearance. C2 clearance is available for applications requiring tighter radial play, such as precision spindle bearings in office equipment. C4 clearance is available for high-temperature or press-fit housing conditions. Specify clearance at the RFQ stage.

Is the 609 bearing available with low-noise grease for home appliance applications? +

Standard fill is a polyurea-thickened mineral grease rated for -20C to 120C. For noise-sensitive applications such as home appliance fans, office copiers, and HVAC blowers, Yuanhe offers a filtered low-noise lithium grease fill with reduced thickener particle size. This reduces bearing noise by 2 to 4 dBA in the 500 Hz to 2 kHz band compared to standard grease. Minimum order quantity applies. Specify low-noise grease at the RFQ stage.