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When your application demands maximum load capacity in a minimal footprint, standard ball bearings simply don't cut it. Engineers, mechanics, and serious DIYers working on motors, gearboxes, automotive drivetrains, and industrial machinery rely on drawn cup needle roller bearings to handle heavy radial loads where space is at a premium. These HK-series bearings are designed for exactly that challenge.
Each bearing in this range features a thin-walled drawn steel outer cup with a full complement of needle rollers retained inside. Inner diameters (d) span 14–25 mm (0.55–0.98 in), outer diameters (D) span 20–32 mm (0.79–1.26 in), and widths (B) range from 12–22 mm (0.47–0.87 in). Available sizes include HK1412, HK1416, HK1512, HK1516, HK1520, HK2216, HK2220, HK2512, HK2516, HK2518, HK2520, and HK2522.
Typical use cases include replacement bearings for small electric motor end caps, gearbox shaft support in power tools, cam follower applications in automation equipment, and needle bearing replacement in automotive rocker arms — all scenarios where a drawn cup needle roller bearing for tight-clearance shaft support is the correct engineering choice.
| Bearing Series | HK (Drawn Cup Needle Roller) |
|---|---|
| Inner Diameter (d) | 14 mm – 25 mm (0.55 in – 0.98 in) |
| Outer Diameter (D) | 20 mm – 32 mm (0.79 in – 1.26 in) |
| Width (B) | 12 mm – 22 mm (0.47 in – 0.87 in) |
| Available Sizes | HK1412, HK1416, HK1512, HK1516, HK1520, HK2216, HK2220, HK2512, HK2516, HK2518, HK2520, HK2522 |
| Roller Type | Full complement needle rollers (no cage) |
| Outer Ring Type | Drawn steel cup |
| Load Direction | Radial |
| Material | See variant options |
| Lubrication | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C₀) | See variant options |
| Pack Quantity Options | 1 pc / 3 pcs / 5 pcs |
Match the three dimensions in the size code: d (inner/shaft diameter), D (housing bore diameter), and B (bearing width). For example, HK2522 fits a 25 mm shaft inside a 32 mm housing bore with a 22 mm width. Measure your shaft and housing bore with calipers before ordering, and verify the width fits your available axial space.
Radial load capacity varies by size — larger d×D×B combinations carry higher loads due to more and longer needle rollers. Full complement designs (no cage) maximise the number of rolling elements, giving higher load ratings than caged equivalents of the same envelope. Refer to the bearing manufacturer's load table for the specific dynamic (C) and static (C₀) ratings of your chosen size.
Standard HK drawn cup needle roller bearings are manufactured from bearing steel and are not inherently corrosion resistant. For wet or mildly corrosive environments, apply a compatible grease or oil lubricant to form a protective film. If your application involves prolonged moisture exposure, consider stainless steel variants or apply appropriate sealing to the housing.
HK drawn cup needle roller bearings run directly on the shaft — the shaft surface acts as the inner raceway. This means the shaft must be hardened (typically 58–64 HRC) and ground to the correct diameter and surface finish. If your shaft cannot be hardened, a separate inner ring (IR series) should be used in conjunction with the HK bearing.
Both HK1412 and HK1416 share the same inner diameter (d = 14 mm) and outer diameter (D = 20 mm), but differ in width: HK1412 is 12 mm wide and HK1416 is 16 mm wide. The wider HK1416 accommodates more needle rollers, resulting in a higher load rating. Choose based on the axial space available in your housing and the load requirements of your application.
Yes. HK drawn cup needle roller bearings are well suited to oscillating motion, slow rotation, and intermittent operation — common in rocker arms, connecting rods, and cam followers. Ensure adequate lubrication is maintained, as full complement designs have less lubricant retention space than caged bearings and benefit from regular re-greasing in demanding cycles.
Order 1 pc for a single repair or prototype build. Choose 3 pcs if you are replacing bearings in a multi-shaft assembly or want a spare on hand. The 5-pc option offers the best per-unit value for small production runs, workshop stock, or applications where scheduled maintenance replacements are planned.
