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When your linear motion axis binds, wobbles, or wears out prematurely, the root cause is often an undersized or mismatched bushing. Engineers, CNC builders, and robotics makers who demand repeatable, low-friction travel need a round flange linear bushing bearing that fits their shaft precisely and stays aligned under load. The LMFC series round flange linear bushing bearings are designed for exactly that use case.
Each LMFC bearing features a hardened steel outer shell with a round flange mounting face, housing recirculating ball circuits that ride directly on the shaft. Available in bore sizes from 6 mm (0.24 in) to 60 mm (2.36 in), with outer diameters ranging from 12 mm to 90 mm and body lengths from 35 mm to 209 mm, these bearings cover a wide range of motion system requirements. The flange diameter and bolt-circle pattern allow direct bolting to plates and carriages without additional adapters.
Typical applications include CNC router Z-axis and gantry carriages requiring tight positional repeatability, 3D printer bed and extruder carriage assemblies where smooth travel reduces print artifacts, and industrial pick-and-place or linear actuator systems where the round flange simplifies carriage plate integration. The LMFC designation follows the standard LMF series envelope with a closed (C) ball-retainer design for quieter operation.
The circular flange face with evenly spaced bolt holes allows direct, centered mounting to carriage plates and support blocks — no adapter brackets needed.
Internal ball tracks recirculate under load to deliver consistent, low-friction linear travel with minimal stick-slip across the full stroke length.
Thirteen model options from LMFC6LUU to LMFC60LUU cover shaft diameters from 6 mm (0.24 in) to 60 mm (2.36 in), fitting light-duty to heavy-duty linear axes.
The double-length LUU body increases the ball contact span, improving load capacity and moment resistance compared to standard single-length LMF variants.
Outer dimensions follow the standard LMF series envelope, making these a direct drop-in replacement for worn or undersized bushings in existing linear motion assemblies.
Suited for CNC routers, 3D printers, laser cutters, pick-and-place machines, and custom linear actuators where a flanged bushing simplifies carriage design.
| Series | LMFC (LMF Closed, Double Length) |
|---|---|
| Bore Diameter | 6 mm – 60 mm (0.24 in – 2.36 in); see variant options |
| Outer Diameter | 12 mm – 90 mm; see variant options |
| Body Length | 35 mm – 209 mm; see variant options |
| Flange Type | Round flange with bolt-circle pattern |
| Retainer Type | Closed ball retainer (LUU double-length body) |
| Material | Hardened steel outer shell, steel ball elements |
| Shaft Tolerance | h6 or f7 recommended |
| Mounting | Flange bolt holes; bolt size see variant options |
| Quantity per Order | 1 piece (1pcs) |
| Available Models | LMFC6LUU, LMFC8LUU, LMFC10LUU, LMFC12LUU, LMFC13LUU, LMFC16LUU, LMFC20LUU, LMFC25LUU, LMFC30LUU, LMFC35LUU, LMFC40LUU, LMFC50LUU, LMFC60LUU |
Match the bore diameter to your shaft diameter. For example, if your linear shaft is 12 mm, select the LMFC12LUU. Always verify the shaft is ground to h6 or f7 tolerance for proper fit. If you are replacing an existing bushing, match the outer diameter and body length as well to ensure the carriage plate holes align.
The LMFC series uses a closed (C) ball retainer, which keeps the balls contained even when the bearing is removed from the shaft. The LUU suffix indicates a double-length body, which increases the ball contact span and improves load capacity and moment resistance compared to a standard single-length LMF bearing.
These bearings are designed for use with precision ground shafts at h6 or f7 tolerance. Using an unground or rough shaft will reduce bearing life and increase play. For best results, pair with a hardened and ground linear shaft of the matching diameter.
The standard LMFC series is manufactured from hardened steel and is not inherently corrosion resistant. For environments with moisture or mild chemical exposure, we recommend applying a light machine oil or grease to the shaft and bearing interior. If your application requires stainless steel construction, please contact us to confirm availability.
Yes. The LMFC series is widely used in 3D printer bed carriages, extruder assemblies, and CNC router gantry and Z-axis slides. The round flange simplifies mounting to carriage plates with standard bolt patterns. Select the model that matches your existing shaft diameter for a direct fit.
Each order includes 1 piece (1pcs) of the selected LMFC model. If you need multiple bearings for a dual-rail or multi-axis setup, simply increase the quantity in your cart before checkout.
Dynamic and static load ratings vary by model size. Larger bore models (e.g., LMFC30LUU and above) carry significantly higher loads than smaller models. For specific load rating data, contact us to confirm the rated capacity for your selected model before use in high-load applications.
