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When your assembly demands maximum load capacity in a minimal footprint, finding a bearing that fits precisely without sacrificing strength is a real challenge. Engineers, machine builders, and DIY mechanics working on motors, gearboxes, pumps, and power tools know the frustration of oversized housings or undersized load ratings. These HK-series drawn cup needle roller bearings are engineered for exactly those situations.
Each bearing features a thin-walled drawn steel outer cup with a full complement of needle rollers inside, delivering exceptional radial load capacity relative to their compact cross-section. Available in 21 size options spanning inner diameters from 4 mm (0.157 in) to 10 mm (0.394 in), outer diameters from 8 mm (0.315 in) to 17 mm (0.669 in), and heights from 8 mm (0.315 in) to 15 mm (0.591 in). The HK designation follows the ISO/DIN standard drawn cup needle roller bearing series.
Typical use cases include small electric motor shaft support, automotive transmission auxiliary shafts, pneumatic tool internals, and precision gearbox needle bearing replacement. Long-tail applications include HK0408 needle bearing replacement, drawn cup bearing for RC motor, and compact radial bearing for power tool repair.
From 4×8×8 mm to 10×17×15 mm (ID×OD×H), covering a wide range of shaft and housing combinations for motors, gearboxes, and tooling applications.
The thin-walled drawn cup design minimizes radial space requirements while maintaining structural integrity under sustained radial loads.
Maximum number of needle rollers fills the bearing envelope, delivering higher radial load capacity compared to caged designs of the same envelope size.
Conforms to internationally recognized HK drawn cup needle roller bearing dimensions, ensuring drop-in compatibility with standard housings and shafts.
Order from 1 to 50 pieces per pack — ideal for single-unit repairs, workshop stock, or small-batch production runs without overstocking.
Dimensionally interchangeable with OEM HK-series bearings in power tools, small motors, automotive auxiliaries, and industrial machinery.
| Bearing Series | HK (Drawn Cup Needle Roller) |
|---|---|
| Inner Diameter (ID) Range | 4 mm – 10 mm (0.157 in – 0.394 in) |
| Outer Diameter (OD) Range | 8 mm – 17 mm (0.315 in – 0.669 in) |
| Height Range | 8 mm – 15 mm (0.315 in – 0.591 in) |
| Available Sizes | 21 options (see variant selector) |
| Outer Ring Type | Drawn steel cup |
| Roller Type | Full complement needle rollers |
| Load Direction | Radial |
| Standard | ISO / DIN HK series |
| Lubrication | See variant options |
| Operating Temperature | See variant options |
| Pack Quantity | 1 / 2 / 4 / 5 / 8 / 10 / 20 / 50 pcs |
Measure your shaft outer diameter — this is your required bearing ID. Then measure your housing bore — this is your required bearing OD. Finally, confirm the available axial space matches the bearing height (H). Use the size option format ID×OD×H mm to find your match. For example, a 6 mm shaft in a 10 mm bore with 8 mm axial space requires the 6×10×8 mm variant.
HK-series drawn cup needle roller bearings offer high radial load capacity relative to their compact size due to the full complement needle roller design. Exact dynamic and static load ratings vary by size. For critical load calculations, refer to the bearing manufacturer's load rating tables for the specific HK designation (e.g., HK0408, HK0608, HK1012).
Standard HK-series drawn cup needle roller bearings are manufactured from bearing steel, which provides good mechanical strength but limited corrosion resistance in wet or chemically aggressive environments. For corrosive environments, ensure adequate sealing and lubrication, or contact us to confirm material options for your specific application.
Yes. These bearings follow ISO/DIN HK-series dimensional standards, making them dimensionally interchangeable with OEM and aftermarket HK-series drawn cup needle roller bearings of the same designation. Always verify the exact ID, OD, and height against your housing and shaft before installation.
The HK designation encodes the bearing dimensions: the first two digits indicate the inner diameter in mm, and the next two digits indicate the height in mm. So HK0408 = 4 mm ID, 8 mm height; HK0608 = 6 mm ID, 8 mm height. The outer diameter is determined by the standard series. Use the size option (ID×OD×H) in the variant selector to confirm all three dimensions.
Apply a thin film of appropriate grease or oil to the needle rollers and the shaft before installation. Press the bearing into the housing bore using a suitable press tool applied to the outer cup — never strike the bearing directly. Ensure the shaft is clean, smooth, and within the recommended tolerance for the bearing ID. Avoid axial loads during installation.
For a single repair or prototype, the 1-piece or 2-piece pack is ideal. Workshop stock or small production runs benefit from the 10 or 20-piece packs for better per-unit value. The 50-piece pack offers the lowest per-unit cost and suits recurring maintenance schedules or batch assembly. Select your pack quantity alongside your size in the variant options above.
