Manufactured by CHG Bearing, the 689 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 9 mm bore diameter, a 17 mm outer diameter, and a 4 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
689 - Metric Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 689 |
| Dimensions | |
| Bore Diameter (d) | 9 mm |
| Width (B) | 4 mm |
| Outer Diameter (D) | 17 mm |
| Open Width B | 4 mm |
| Radius rs min | 0.2 mm |
| Flange Df | 19 mm |
| Closed Width B1 | 5 mm |
| Open Flange Width Bf | 1 mm |
| Closed Flange Width Bf1 | 1.1 mm |
| Performance | |
| Dynamic Load Cr (N) | 1327 N |
| Static Load C0r (N) | 668 N |
| Grease Speed (x1000 rpm) | 36 x1000 rpm |
| Oil Speed (x1000 rpm) | 43 x1000 rpm |
| Design Configurations | |
| Open Model | 689 |
| Flanged Open Model | F689 |
| Shielded Model | 689ZZ |
| Flanged Shielded Model | F689ZZ |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 11 |
| Ball Size Dw | 2 mm |
| Shielded Weight (g) | 4.38 g |
| Flanged Shielded Weight (g) | 4.87 g |
| Open Weight (g) | 3.41 g |
| Flanged Open Weight (g) | 3.85 g |
689 17 mm 9 mm 4 mm Frequently Asked Questions about 689 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each 689 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (9 mm bore side) ensures perfect planar contact without edge binding.
To safeguard CHG Bearing 689 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (9 mm x 17 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Standard batches of CHG Bearing 689 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
To ensure optimum performance of CHG Bearing 689 Metric Miniature Deep Groove Ball Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 9 mm bore. For the 17 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
