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When your assembly demands maximum radial load capacity in a minimal footprint, standard ball bearings simply don't fit the bill. Engineers, maintenance technicians, and precision machine builders working on gearboxes, automotive drivetrains, textile machinery, and power tools need a bearing that delivers reliable needle-roller performance without adding bulk. The HK series drawn cup needle roller bearings are engineered for exactly these demanding, space-constrained applications.
Each bearing in this series features a thin-walled, deep-drawn steel outer cup with a full complement of needle rollers retained inside. The outer cup is manufactured from case-hardened steel, providing a hardened raceway surface (typically 58–64 HRC) directly integrated into the shell. Sizes span from HK0608 (6×10×8 mm / 0.24×0.39×0.31 in) up to HK1816 (18×24×16 mm / 0.71×0.94×0.63 in), covering inner diameters from 6 mm to 18 mm and widths from 8 mm to 16 mm across 16 size options.
Typical use cases include: replacing worn needle bearings in small electric motor housings where radial space is limited; fitting into connecting-rod small-end bores on two-stroke engines and compressors; and serving as pivot bearings in industrial robot joints, cam followers, and oscillating linkage mechanisms where high load density and low cross-section are critical long-tail requirements.
Maximizes the number of rolling elements within the drawn cup, delivering higher radial load capacity per unit volume compared to caged needle bearings — ideal for oscillating and slow-rotation applications.
The outer cup is cold-formed from low-carbon steel strip and case-hardened to typically 58–64 HRC, creating an integrated hardened raceway that eliminates the need for a separate outer ring housing bore preparation.
Inner diameters from 6 mm to 18 mm, outer diameters from 10 mm to 24 mm, and widths from 8 mm to 16 mm — select the exact size that matches your shaft and housing dimensions without custom machining.
The HK series features an open end on one side, allowing the shaft to pass through — a critical advantage in connecting-rod, rocker-arm, and cam-follower assemblies where axial shaft access is required.
Needle rollers and the drawn cup shell receive a protective surface treatment to resist oxidation during storage and light-duty operation. For wet or chemically aggressive environments, additional sealing or lubrication is recommended.
Order a single bearing for a one-off repair, a 4-piece pack for a multi-cylinder engine rebuild, or a 10-piece pack for production line stocking — all at per-unit pricing scaled to quantity.
| Bearing Series | HK (Drawn Cup Needle Roller, Open End) |
|---|---|
| Inner Diameter (ID) Range | 6 mm – 18 mm (0.24 in – 0.71 in) |
| Outer Diameter (OD) Range | 10 mm – 24 mm (0.39 in – 0.94 in) |
| Width Range | 8 mm – 16 mm (0.31 in – 0.63 in) |
| Available Sizes | HK0608, HK0609, HK0808, HK0810, HK0910, HK1010, HK1012, HK1210, HK1212 (×2 OD variants), HK1412, HK1416, HK1512, HK1612, HK1712, HK1816 |
| Roller Type | Full complement needle rollers |
| Outer Cup Material | Case-hardened low-carbon steel |
| Surface Hardness (Raceway) | Typically 58–64 HRC |
| Design Standard | DIN 618 / ISO 3245 (HK series) |
| End Type | Open end (one side open for shaft passage) |
| Lubrication | Grease-lubricated prior to assembly; re-lubrication recommended per application |
| Operating Temperature | See variant options |
| Pack Quantities Available | 1 Pcs / 4 Pcs / 10 Pcs |
Match the bearing's inner diameter (ID) to your shaft diameter and the outer diameter (OD) to your housing bore. The width should fit within your available axial space. For example, if your shaft is 10 mm and your housing bore is 14 mm with 10 mm of axial space, select HK1010 (10×14×10 mm). Always verify all three dimensions — ID, OD, and width — against your engineering drawings before ordering.
HK series drawn cup needle roller bearings offer high radial load capacity relative to their cross-section due to the full complement roller design. Dynamic load ratings vary by size — for example, smaller sizes like HK0608 typically carry 2.5–4 kN dynamic radial load, while larger sizes like HK1816 can handle 10–18 kN. Refer to the DIN 618 / ISO 3245 load tables for your specific size, or contact us to confirm ratings for your load case.
Full complement needle roller bearings (no cage) are optimized for high radial load and oscillating or slow-to-moderate rotation rather than sustained high-speed operation. At high speeds, roller-to-roller contact generates heat. If your application requires continuous high-speed rotation (typically above 3,000–5,000 RPM depending on size), consider a caged needle roller bearing instead. For cam followers, rocker arms, and connecting rods with oscillating motion, the HK full complement design is well-suited.
The drawn cup shell and needle rollers are made from case-hardened steel with a protective surface treatment suitable for dry or lightly oiled environments. They are not inherently stainless and are not rated for continuous exposure to water, salt spray, or aggressive chemicals. For corrosive environments, apply a compatible bearing grease with corrosion inhibitors, or contact us to discuss stainless or coated alternatives.
Both variants share the same inner diameter (12 mm) and width (12 mm) but differ in outer diameter: one is 18 mm OD and the other is 16 mm OD. This reflects two distinct HK1212 sub-variants used in different housing bore standards. Always confirm your housing bore diameter before selecting — choose 12×18×12 mm for an 18 mm bore and 12×16×12 mm for a 16 mm bore.
Yes. HK series drawn cup needle roller bearings are designed for use with shafts ground to h5 or h6 tolerance (light interference to sliding fit) per DIN 618 recommendations. The housing bore should be machined to H7 tolerance for a standard press-fit of the outer cup. Using an undersized shaft or oversized bore will reduce load capacity and bearing life.
In most cases, yes. HK series dimensions are standardized under DIN 618 / ISO 3245, so bearings of the same size designation (e.g., HK1010) from different manufacturers share the same ID, OD, and width. Verify the exact dimensions on your existing bearing before ordering to confirm compatibility, particularly for the two HK1212 OD variants available in this listing.
