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Engineers, makers, and CNC builders who demand repeatable, low-friction linear motion know how critical the right bushing is. Misaligned or undersized bushings cause binding, premature wear, and lost precision — exactly the problems the LMFP series is designed to eliminate. Whether you are prototyping a delta-style 3D printer, assembling a router gantry, or building a custom automation fixture, these round flange linear bushing bearings give you a reliable, bolt-down mounting solution that stays put under load.
The LMFP series features a round flange body with a recessed bolt circle for secure panel or plate mounting. The bushing body is constructed from steel with a polymer-lined ball retainer cage, providing smooth rolling contact along the shaft. Available in shaft diameters ranging from 6 mm (approximately 0.24 in) to 60 mm (approximately 2.36 in), with both Regular Type and Lengthened (LUU) variants to match your stroke and load requirements. Pack quantities of 1–5 pieces let you order exactly what your build needs.
Typical use cases include CNC router Z-axis and gantry linear guides, 3D printer smooth-rod carriage assemblies, and light-duty automation slide rails where a flanged mount simplifies alignment and reduces assembly time. The round flange format is especially well-suited for through-hole panel mounting in laser cutters, plasma tables, and pick-and-place machines.
Shaft diameters from 6 mm to 60 mm (0.24–2.36 in) in a single product family, covering small desktop CNC builds up to heavy-duty industrial slide assemblies.
Integrated round flange with bolt-circle holes allows direct panel or plate mounting, eliminating the need for separate clamp-style housing blocks and simplifying alignment.
Choose Regular Type for standard stroke applications or the Lengthened (LUU) variant for increased load capacity and improved moment resistance on longer unsupported shaft spans.
Recirculating ball bearing design delivers smooth, consistent linear travel with minimal stick-slip, maintaining positioning accuracy across repeated cycles.
Available in packs of 1–5 pieces per order, so you can stock exactly what your project requires without over-ordering or paying for unnecessary extras.
LMFP series dimensions follow standard linear bushing conventions, making these a straightforward replacement for worn or undersized bushings in existing CNC and automation equipment.
| Series | LMFP (Round Flange, Linear Bushing) |
|---|---|
| Shaft Diameter Range | 6 mm – 60 mm (0.24 in – 2.36 in) |
| Available Models | LMFP6UU, LMFP8UU, LMFP10UU, LMFP12UU, LMFP13UU, LMFP16UU, LMFP20UU, LMFP25UU, LMFP30UU, LMFP35UU, LMFP40UU, LMFP50UU, LMFP60UU + Lengthened (LUU) variants |
| Product Type Options | Regular Type / Lengthened (LUU) |
| Mounting Style | Round Flange with bolt-circle holes |
| Bearing Type | Recirculating ball linear bushing |
| Outer Diameter | See variant options |
| Flange Outer Diameter | See variant options |
| Overall Length (Regular) | See variant options |
| Overall Length (Lengthened) | See variant options |
| Shaft Tolerance Fit | h7 recommended |
| Material — Body | Steel |
| Material — Retainer | Polymer ball retainer cage |
| Pack Quantity | 1 / 2 / 3 / 4 / 5 pcs (select above) |
| Weight per Unit | See variant options |
The Regular Type suits most standard linear motion applications where shaft support is adequate and stroke length is moderate. The Lengthened (LUU) variant has a longer body, which increases the number of ball circuits in contact with the shaft — this improves load capacity and reduces rocking moment on longer unsupported shaft spans. If your carriage or slide experiences side loads or your shaft is unsupported over a long distance, choose the LUU version.
The model number directly encodes the shaft diameter: LMFP6UU fits a 6 mm shaft, LMFP16UU fits a 16 mm shaft, and so on up to LMFP60UU for 60 mm shafts. Match the number in the model name to your shaft's nominal diameter. Always verify with calipers before ordering if your shaft is from a third-party source.
An h7 tolerance on the shaft is the standard recommendation for LMFP-series linear bushings. Shafts that are too loose will cause play and noise; shafts that are too tight will increase friction and accelerate wear. Hardened and ground shafts (typically 60 HRC surface hardness) are strongly recommended for best service life.
Yes. The LMFP series is widely used in CNC router gantry and Z-axis assemblies, delta and Cartesian 3D printer smooth-rod carriages, and laser cutter linear guides. The round flange format makes it straightforward to bolt directly to a carriage plate or end panel, which is a common design pattern in open-source CNC and 3D printer builds.
The round flange has a bolt-circle pattern of through-holes that allow you to fasten the bushing directly to a flat plate or panel using screws. Ensure the housing bore in your plate matches the bushing's outer diameter for a snug fit. Avoid over-tightening flange bolts, as excessive clamping force can distort the bushing body and increase friction on the shaft.
Light lubrication with a general-purpose lithium grease or machine oil is recommended for optimal performance and service life. Apply a thin film to the shaft before installation. In dusty environments such as woodworking CNC routers, consider adding shaft wipers or bellows covers to keep contaminants away from the ball tracks.
Yes, and it is common practice. Using two bushings per shaft — spaced apart along the axis — significantly improves moment resistance and reduces carriage rocking. This is the standard configuration in most CNC and 3D printer linear motion systems. The pack quantities of 2, 3, 4, or 5 pieces make it easy to order the right number for your axis count.
Both are round-flange linear bushings, but the LMFP series uses a polymer ball retainer cage, which tends to run quieter and requires less lubrication than the all-steel LMF retainer. The LMFP designation is the more common choice for maker and light-industrial applications. Verify outer diameter and flange dimensions are compatible with your housing before substituting one series for the other.
