Deep Groove Ball Bearings

Deep Groove Ball Bearings are single-row bearings with continuous raceways on the inner and outer rings. They support radial loads and axial loads in both directions and are used in compact rotating assemblies. The listed 608 configuration measures 8 × 22 × 7 mm and is available in 608Z, 608ZZ, and 608RS configurations. The 608ZZ version uses double metal shields and grease lubrication, with a specified speed of up to 34,000 RPM. Typical applications include skateboards, inline skates, scooters, and other small wheel assemblies.

608 Compact Size
The 8 mm bore, 22 mm outside diameter, and 7 mm width provide a compact bearing format for wheel and small rotating assemblies where installation space is limited.
Double Metal Shields
The 608ZZ configuration uses metal shields on both sides. The shields help retain grease inside the bearing and reduce the entry of external particles during operation.
Grease-Lubricated Operation
The 608ZZ version is supplied with grease lubrication. The specified speed is up to 34,000 RPM, while the applicable operating speed depends on load, mounting, lubrication, and operating conditions.
Standardized Configuration
The 608 dimensional format provides a defined bore, outside diameter, and width for equipment integration and replacement where the same dimensions are required.

608Z
The Z configuration uses a metal shield on one side. It provides basic protection while leaving the opposite side accessible for applications with specific installation or lubrication requirements.
608ZZ
The ZZ configuration uses metal shields on both sides and is supplied with grease lubrication. It is suited to applications requiring protection from general external contamination.
608RS
The RS configuration uses a rubber sealing arrangement. It provides a different sealing approach from metal-shielded versions and is suitable where greater protection from dust and contaminants is required.

Material Preparation
Carbon steel material is prepared according to the specified bearing configuration. Material identification is maintained through the production process for controlled batch management.
Heat Treatment
Bearing rings and rolling components are heat-treated to establish the required hardness and dimensional stability before precision finishing.
Precision Grinding
Raceways and critical bearing surfaces are ground to the required geometry. Controlled grinding supports consistent contact between the rolling elements and raceways.
Assembly & Lubrication
Finished rings, balls, cage, shields or seals are assembled under controlled conditions. Grease is applied according to the specified bearing configuration before final inspection.

Dimensional Inspection
The 8 mm bore, 22 mm outside diameter, and 7 mm width of the listed 608 configuration are checked against the approved dimensional specification. Critical dimensions are inspected before assembly or shipment as required.
Rotation Inspection
Finished bearings are checked for rotational condition. Inspection is used to identify abnormal resistance, rough running, or irregular rotation.
Clearance & Component Check
Applicable internal clearance and component fit are checked according to the production specification. Shields or seals are inspected for correct installation and seating.
Final Inspection
Final checks cover bearing appearance, lubrication condition, protection configuration, model identification, quantity, and package condition before shipment.

Drawing-Based Production
Custom requirements can be reviewed from an approved drawing, sample, or technical specification. This allows dimensions and configuration details to be confirmed before production.
Bearing Configuration
Available requirements can include dimensions, protection type, material, internal clearance, lubrication, and product marking, subject to technical confirmation.
OEM Packaging
Package labels, product identification, quantities, carton configuration, and customer-specified markings can be arranged according to the approved order requirements.

Skateboard Wheels
The 608 dimensional configuration is used in skateboard wheel assemblies where an 8 × 22 × 7 mm bearing is required.
Inline Skates
The compact bearing format fits compatible inline skate wheel assemblies and other small wheel mechanisms.
Scooters
The 608 configuration can be used in scooter wheel assemblies designed around the same bearing dimensions.
Compact Rotating Assemblies
The small outside diameter and width are suitable for other mechanisms where the installation envelope matches the 608 configuration.

Available quality and compliance documentation includes ISO 9001, CE, RoHS, and REACH, according to the applicable product and order requirements.
Product documentation can include specifications, inspection information, product identification, and applicable compliance records. Documentation requirements can be confirmed before production for projects requiring controlled purchasing records.

Individual Protection
Individual packaging can be used to separate bearings during handling and storage, helping protect finished surfaces from contact and contamination.
Bulk Packaging
Tube, box, carton, and pallet packaging can be arranged according to bearing type, order quantity, and transportation requirements.
Package Identification
Labels can include model, quantity, product identification, and batch information. This supports receiving inspection and warehouse identification after delivery.

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