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When a cam, guide rail, or linear track demands a rolling element that can handle both radial loads and axial guidance simultaneously, standard bearings fall short. Engineers, machine builders, and maintenance professionals working on automation equipment, conveyor systems, and cam-driven mechanisms need a bolt-type cam follower they can rely on across a wide size range. These CF3–CF30 (KR10–KR90) needle roller bearings are designed to meet exactly that need — available in 18 model sizes from CF3 to CF30, with outer diameters ranging from 10 mm (0.39 in) to 90 mm (3.54 in).
Each cam follower is constructed from bearing steel, offering a balance of hardness and toughness suited to rolling contact applications. The bolt-type (stud) design integrates a threaded stud for direct mounting without a separate housing. Outer ring diameters span 10–90 mm (0.39–3.54 in); stud thread sizes and lengths vary by model — see variant options for exact per-model dimensions. Available in single-piece quantities or multi-packs of 3 or 5 for maintenance stock or multi-axis builds.
Typical use cases include cam follower applications on indexing tables and rotary cams, linear guide rail systems where the outer ring rolls directly on a track, conveyor and material handling equipment requiring compact rolling support, and industrial automation machinery with reciprocating or oscillating motion paths — all scenarios where a compact, self-contained needle roller cam follower reduces design complexity and assembly time.
| Model Range | CF3 to CF30 |
|---|---|
| KR Designation Range | KR10 to KR90 |
| Outer Diameter Range | 10 mm – 90 mm (0.39 in – 3.54 in) |
| Bearing Type | Bolt-type (stud-type) cam follower needle roller bearing |
| Material | Bearing steel |
| Stud Thread Size | See variant options |
| Stud Length | See variant options |
| Inner Diameter | See variant options |
| Width / Length | See variant options |
| Dynamic Load Rating | See variant options |
| Static Load Rating | See variant options |
| Available Quantities | 1 pc, 3 pcs, 5 pcs |
The CF number (e.g., CF3, CF10, CF20) refers to the stud diameter series, while the KR number (e.g., KR10, KR22, KR52) indicates the outer ring diameter in millimeters. Match the outer diameter to your track or cam profile width, and match the stud thread to your mounting hole. Check the load ratings for your specific model against your application's radial load requirements before ordering.
The "-1" suffix (e.g., CF10-1, CF12-1) typically denotes a variant with a different stud length or a crowned outer ring profile compared to the standard model. The crowned profile can improve edge load distribution on slightly misaligned tracks. Check the specific dimensional data for each variant to confirm which suits your mounting depth and alignment conditions.
Yes. Bolt-type cam followers are designed so the outer ring rolls directly on a cam surface or guide track. For best service life, the mating track surface should be hardened (typically 58–64 HRC) and ground to a smooth finish. Running on an unhardened or rough surface will accelerate wear on both the outer ring and the track.
Cam followers in this series are typically supplied with seals or shields and pre-greased for initial operation. For extended service life — especially in high-speed, high-load, or contaminated environments — periodic re-lubrication through the grease nipple (if present on the model) is recommended. Refer to the specific model's datasheet for lubrication intervals and grease type.
These are primarily designed for radial loads applied through the outer ring rolling on a cam or track surface. They can also handle limited axial (thrust) loads via the guide flanges on the outer ring, depending on the model. They are not intended for pure axial load applications. Always verify the dynamic and static radial load ratings for your selected model against your application's actual load conditions.
Multi-axis machines and conveyor systems often require multiple cam followers of the same model — for example, a linear guide carriage may use 4–6 followers. Ordering a 3-pack or 5-pack reduces per-unit cost and ensures you have spares on hand for maintenance without waiting for a reorder. The 5-pack option offers the best per-unit value for larger builds or maintenance stock.
Thread the stud into a tapped hole or pass it through a clearance hole and secure with a nut. Apply the specified torque to the stud nut — over-tightening can preload the bearing and reduce service life; under-tightening can allow the stud to rotate under load. Ensure the outer ring is free to rotate and makes full, even contact with the cam or track surface. Do not press or hammer the outer ring during installation.
