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When your assembly demands maximum load capacity in a minimal footprint, standard ball bearings simply don't cut it. Engineers, machinists, and serious DIYers working on motors, gearboxes, automotive drivetrains, and industrial machinery need a bearing that fits where others won't. The HK series drawn cup needle roller bearings are purpose-built for exactly these demanding, space-constrained applications.
Each bearing in this series features a thin-walled drawn steel outer cup with a full complement of needle rollers retained inside, delivering an exceptional load-to-size ratio. Inner diameters range from 8 mm to 12 mm (approx. 0.31"–0.47"), outer diameters from 12 mm to 18 mm (approx. 0.47"–0.71"), and thicknesses from 10 mm to 15 mm (approx. 0.39"–0.59"). Available sizes include HK0810, HK1010, HK1012, HK1015, and HK1212.
Typical use cases include replacement bearings for small electric motor shafts, needle roller bearings for gearbox countershafts, and compact drawn cup bearings for pneumatic tool internals — all scenarios where radial space is at a premium and reliable performance is non-negotiable.
Maximizes the number of rolling elements for superior radial load capacity without increasing the outer envelope — ideal for high-load, low-speed applications.
The thin-walled drawn cup construction allows direct housing bore installation, eliminating the need for a separate outer ring and saving critical assembly space.
Nine distinct size variants covering inner diameters of 8–12 mm and thicknesses of 10–15 mm, giving you precise fitment across a broad range of shaft sizes.
The open-ended cup allows the shaft to pass through, making these bearings suitable for through-shaft configurations common in gearboxes and actuators.
Bearing surfaces are treated to resist oxidation during storage and light-duty operation, extending service life in moderately humid environments.
Order a single bearing for a one-off repair or a 10-piece pack for workshop stock — both options available for every size variant in this series.
| Bearing Type | Drawn Cup Needle Roller Bearing |
|---|---|
| Series | HK Series (HK0810, HK1010, HK1012, HK1015, HK1212) |
| Inner Diameter (ID) | 8 mm – 12 mm (approx. 0.31" – 0.47") |
| Outer Diameter (OD) | 12 mm – 18 mm (approx. 0.47" – 0.71") |
| Thickness | 10 mm – 15 mm (approx. 0.39" – 0.59") |
| Outer Cup Material | Drawn steel |
| Rolling Element | Full complement needle rollers |
| End Type | Open end (shaft-through capable) |
| Load Direction | Radial |
| Lubrication | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C0) | See variant options |
| Max Operating Speed | See variant options |
| Pack Quantity | 1 pc or 10 pcs (select above) |
Match the bearing's Inner Diameter (ID) to your shaft diameter and the Outer Diameter (OD) to your housing bore. The size designation encodes these dimensions — for example, HK0810 has an 8 mm ID, 12 mm OD, and 10 mm thickness. Always verify both shaft and housing tolerances before ordering.
Both share the same 10 mm inner diameter and 10 mm thickness, but differ in outer diameter: 14 mm vs. 16 mm. The larger OD variant fits a wider housing bore and typically offers a slightly higher load rating due to longer needle rollers. Select based on your housing bore size.
No. Drawn cup needle roller bearings are designed exclusively for radial loads. If your application involves combined radial and axial loads, you will need to pair these with a separate thrust bearing or select a different bearing type such as a combined needle roller and thrust bearing.
These bearings are suitable for moderately humid indoor environments. For outdoor, washdown, or submerged applications, we recommend using sealed or stainless steel bearings instead. If used in damp conditions, ensure adequate relubrication intervals to prevent rust on the needle rollers.
A lithium-based grease (NLGI Grade 2) is suitable for most low-to-medium speed applications. For higher speeds, a light mineral oil may be preferred. Apply lubrication to the needle rollers and shaft surface before installation. Do not over-grease, as excess lubricant can cause heat buildup.
Press the bearing into the housing bore using a suitable arbor press or installation tool that applies force evenly to the outer cup rim — never strike the bearing directly with a hammer. Ensure the housing bore is clean and within tolerance. The shaft should be lightly oiled before insertion through the open end of the bearing.
If you are servicing multiple assemblies, running a workshop, or want to keep spares on hand, the 10-piece pack offers a lower per-unit cost compared to buying singles. It is particularly useful for production runs or preventive maintenance schedules where bearings are replaced at set intervals.
