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When your assembly has no room for a full-complement bearing but still demands reliable radial load capacity, drawn cup needle roller bearings are the go-to choice for engineers, mechanics, and serious DIYers. The HK Series is designed for applications where shaft space is at a premium — delivering a thin-walled, press-fit outer cup with a full complement of needle rollers that maximise load area without adding bulk.
Each bearing in this listing is manufactured from bearing-grade steel with a drawn outer cup and a full complement of needle rollers. Dimensions follow the HK designation system: ID (inner diameter) × OD (outer diameter) × Height, ranging from HK0306 (3 × 6.5 × 6 mm / 0.12 × 0.26 × 0.24 in) up to HK1820 (18 × 25 × 20 mm / 0.71 × 0.98 × 0.79 in). Wall thickness is typically 1.5–3.5 mm depending on the size selected.
Typical use cases include small gearboxes and transmission shafts requiring compact needle roller support, automotive rocker arms and connecting rod small ends where drawn cup needle bearings reduce reciprocating mass, and industrial cam followers and oscillating linkages where a thin cross-section is critical for packaging. Select your exact HK size and quantity above to match your application.
From HK0306 (3 mm ID) to HK1820 (18 mm ID) — select the exact ID × OD × Height combination your application requires.
Maximises the number of rolling elements within the drawn cup, delivering higher radial load capacity relative to the bearing's compact envelope.
Thin-walled drawn cup integrates directly into the housing bore as the outer raceway, eliminating the need for a separate outer ring and saving radial space.
HK Series bearings are available in open-end configurations suitable for through-shaft assemblies and oscillating motion applications.
Choose quantity 1 for single-unit replacement or quantity 5 for maintenance stock — both options available for every size in this listing.
The drawn outer cup is designed for press-fit into a machined housing bore, providing a secure, non-rotating fit without additional retention hardware.
| Bearing Series | HK (Drawn Cup Needle Roller) |
|---|---|
| Inner Diameter (ID) Range | 3 mm – 18 mm (0.12 in – 0.71 in) |
| Outer Diameter (OD) Range | 6.5 mm – 25 mm (0.26 in – 0.98 in) |
| Height Range | 6 mm – 22 mm (0.24 in – 0.87 in) |
| Material | Bearing-grade steel (drawn outer cup) |
| Rolling Element | Full complement needle rollers |
| Wall Thickness | See variant options |
| Load Type | Radial |
| Lubrication | See variant options |
| Operating Temperature | See variant options |
| Quantity per Pack | 1 pcs or 5 pcs (select above) |
| Dimension Standard | Metric (mm) |
Match the bearing's ID to your shaft diameter and the OD to your housing bore. The height (H) should fit within your available axial space. Use the HK designation format: HK[ID][H] — for example, HK0810 has a 8 mm ID and 10 mm height. Always verify all three dimensions (ID × OD × Height) against your engineering drawing before ordering.
Standard HK Series bearings are open-ended and require external lubrication. HK-RS variants include a rubber seal on one or both ends to retain grease and exclude contaminants. This listing covers the open HK Series; if your application is exposed to dust or moisture, consider a sealed variant or add an external seal to your housing design.
Yes. Drawn cup needle roller bearings are well-suited for oscillating and reciprocating motion, such as rocker arms, connecting rods, and cam followers. For continuous rotation at high speeds, ensure adequate lubrication and verify the bearing's dynamic load rating against your application's requirements.
The shaft running inside the bearing should be ground to tolerance h5 or h6 for optimal performance. The shaft surface acts as the inner raceway, so surface hardness of 58–64 HRC and a surface finish of Ra 0.2–0.4 µm are recommended. The housing bore for the outer cup press-fit is typically tolerance H7.
Yes — HK Series drawn cup needle roller bearings are designed to run directly on a hardened and ground shaft, which serves as the inner raceway. No separate inner ring is required. This is one of the key advantages of the drawn cup design: it minimises the radial cross-section of the bearing assembly.
Press the bearing into the housing bore using a suitable press tool or bearing driver that contacts only the outer cup rim — never press on the needle rollers or cage. Ensure the housing bore is clean, chamfered, and within the specified H7 tolerance. Apply a thin film of compatible grease to the needle rollers before installation. Do not hammer directly on the bearing.
Order 1 pc for a single replacement or prototype build. Order 5 pcs if you are stocking spares for maintenance, building multiple assemblies, or want a cost-effective quantity for a small production run. Both options are available for every size in this listing — select your preferred quantity in the Qty(pcs) option above.
