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When your CNC router, 3D printer, or automation rig demands consistent, low-friction linear travel, a worn or mismatched bushing becomes the weakest link in your build. Engineers, robotics builders, and machine tool enthusiasts who need repeatable accuracy across thousands of cycles rely on round flange linear bushing bearings to keep their axes running true.
These LMF-series round flange linear bushings feature a steel outer shell with recirculating ball bearings and a flanged mounting face for secure, bolt-down installation. Available in bore sizes from 6mm (LMF6UU) to 80mm (LMF80UU), with outer diameters ranging from 12mm to 120mm and body lengths from 19mm to 140mm. Sold in packs of 1 to 10 pieces to match your project scale.
Typical use cases include linear axis assemblies on CNC routers and laser cutters, carriage and slide mechanisms in pick-and-place automation, and precision guide systems in laboratory or industrial equipment — all applications where a round flange linear bushing bearing must deliver consistent stroke-to-stroke repeatability.
The circular flange face allows bolt-down installation from either side of a mounting plate, simplifying alignment in tight housings and reducing assembly time.
Internal recirculating steel balls distribute load evenly across the shaft, delivering smooth, low-friction travel and extended service life under repetitive cycling.
Fourteen model sizes — LMF6UU through LMF80UU — cover the most common shaft diameters used in CNC, robotics, and industrial automation builds.
Order 1, 2, 3, 4, 5, or 10 pieces per SKU to match your exact build quantity, minimizing leftover stock and reducing per-unit cost on larger projects.
The steel outer cylinder and end seals help retain lubrication and resist contamination from dust and swarf — important in workshop and light industrial environments.
LMF-series dimensions follow widely adopted standards, making these bushings straightforward replacements for worn units in existing linear motion systems without re-machining housings.
| Series | LMF (Round Flange Linear Bushing) |
|---|---|
| Available Models | LMF6UU, LMF8UU, LMF10UU, LMF12UU, LMF13UU, LMF16UU, LMF20UU, LMF25UU, LMF30UU, LMF35UU, LMF40UU, LMF50UU, LMF60UU, LMF80UU |
| Bore Diameter Range | 6mm – 80mm (see variant options for specific model) |
| Outer Diameter Range | 12mm – 120mm (see variant options for specific model) |
| Body Length Range | 19mm – 140mm (see variant options for specific model) |
| Shaft dia. × OD × Length (by model) | See variant options |
| Flange Type | Round (circular) flange |
| Bearing Type | Recirculating ball linear bushing |
| Outer Shell Material | Steel |
| Finish | See variant options |
| Recommended Shaft Tolerance | h6 (hardened and ground shaft recommended) |
| Pack Quantity Options | 1 / 2 / 3 / 4 / 5 / 10 pcs |
| Weight (per unit) | See variant options |
Match the bore diameter of the bushing to your shaft diameter. For example, if your linear shaft is 10mm in diameter, select LMF10UU (bore 10mm, OD 19mm, length 29mm). Always verify the shaft is within the recommended h6 tolerance for smooth, rattle-free operation.
These LMF-series bushings are designed for round linear shafts. Hardened and ground steel shafts (typically case-hardened to 60 HRC or above) are strongly recommended to prevent premature wear of the recirculating balls and to maintain dimensional accuracy over time.
Load capacity varies by model size — larger bore models carry significantly higher dynamic and static loads. For specific dynamic load ratings (C) and static load ratings (C₀), refer to the LMF-series datasheet for your chosen model. As a general guide, smaller models (LMF6UU–LMF12UU) suit light-duty CNC and 3D printer axes, while larger models (LMF25UU and above) are suited to heavier industrial slide applications.
The steel outer shell provides moderate corrosion resistance in dry indoor environments. For applications exposed to coolant, moisture, or corrosive atmospheres, additional lubrication maintenance is recommended, or consider stainless-shaft pairings with appropriate sealing. Contact us to confirm suitability for your specific environment.
Yes. The LMF-series follows widely adopted dimensional standards for round flange linear bushings. As long as your housing bore, flange bolt pattern, and shaft diameter match the selected model's specifications, these are designed as drop-in replacements without re-machining.
A typical dual-axis CNC router uses 2 bushings per carriage per axis. For a standard XY gantry with one carriage per axis, a pack of 4 is a common starting point. For XYZ builds with multiple carriages, packs of 5 or 10 offer better per-unit value. Select your pack quantity from the variant options above.
These bushings are typically supplied with a factory grease fill suitable for initial operation. For extended service life, periodic re-lubrication with a lithium-based or machine-tool grease through the lubrication port (where present) is recommended, especially in high-cycle or high-speed applications.
