Round Flange Linear Bearing for Linear Shaft Systems
Round flange linear bearings are used with linear shafts to provide smooth, low-friction linear movement in compact mechanical structures. The flange allows the bearing to be fixed directly to a mounting plate, machine frame, carriage or moving table, making installation easier than using a separate bearing housing.
DLY supplies round flange linear bearings in common LMF and LMEF series, with shaft bore sizes covering small and medium linear motion systems. They are widely used in automation equipment, light CNC machines, packaging machinery, measuring devices, 3D printers, testing equipment and custom linear shaft assemblies.
For projects that require a complete linear motion solution, DLY can also help match the flange bearing with linear shafts, shaft supports, linear bearing blocks and related shaft assemblies.
Product Structure
A round flange linear bearing combines a cylindrical linear bearing body with a round mounting flange. The balls circulate inside the bearing and roll along the surface of the linear shaft, helping reduce sliding friction and support stable linear movement.
Compared with a standard cylindrical linear bearing, the flange type is easier to mount because the flange holes can be fixed directly with screws. This makes it useful for compact equipment where the bearing position needs to be accurately fixed without adding a separate bearing block.
Flanged linear bearings mounted on linear shaft
Linear shaft assembly with flange bearings
Different linear bearing mounting forms
Main Features
Flange Linear Bearing Types
The round flange type is often compared with square flange and oval flange linear bearings. The correct choice depends on mounting space, screw hole position, load direction and the structure of the moving plate.
| Type | Typical Series | Structure | Selection Note |
|---|---|---|---|
| Round flange type | LMF, LMEF | Circular flange with mounting holes | Suitable for general plate mounting and balanced surrounding support. |
| Square flange type | LMK, LMEK | Square flange with four mounting holes | Useful when the installation surface needs a square reference shape. |
| Oval flange type | LMH, LMHE | Compact oval flange structure | Useful where side space is limited but flange mounting is still required. |
Load Rating and Bore Size Reference
This specification table provides a quick reference for LMF, LMK, LMH, LMEF and LMEK flange linear bearing models. It includes ball row quantity, bearing weight, allowable shaft diameter deviation, dynamic load rating, static load rating and matching bore size, helping engineers compare models and select the correct bearing for different shaft diameters and load conditions.
Flange linear bearing load rating, bore size and model reference table
Mounting Dimensions
The mounting dimension chart shows the main installation dimensions of flange linear bearings, including outer diameter, bearing length, flange diameter, PCD, mounting hole size and flange shape. These dimensions are useful for designing mounting plates, checking replacement bearings and confirming assembly space before ordering.
Flange linear bearing mounting dimension drawing and size table
Applications
Round flange linear bearings are suitable for machines that need simple installation, smooth shaft guidance and repeatable linear movement. They are often used in equipment where a linear shaft is already part of the structure.
| Application | Why Flange Linear Bearings Are Used | Selection Note |
|---|---|---|
| Automation equipment | Provides simple shaft-guided motion for pushing, transferring or positioning units. | Check load direction, bearing spacing and shaft support rigidity. |
| Small CNC and engraving machines | Supports smooth movement of light-duty worktables or auxiliary axes. | Confirm shaft hardness, straightness and lubrication. |
| Packaging machinery | Used in repetitive motion structures where easy mounting is needed. | Dust protection and regular lubrication are important. |
| Measuring and testing devices | Helps guide small moving platforms with controlled linear motion. | Avoid side load and misalignment during installation. |
| Custom linear shaft assemblies | Can be combined with shafts, supports and brackets for simple guide systems. | Match bearing type with shaft diameter and support span. |
FAQ
Q: What is a round flange linear bearing?
A: A round flange linear bearing is a linear bearing with a circular mounting flange. It is used with a linear shaft to support smooth straight-line movement and can be fixed directly through the flange holes.
Q: What is the difference between LMF and LMEF?
A: Both are flange linear bearing series. The detailed dimensions, bearing length and mounting size should be checked in the parameter table before selection.
Q: How do I choose the correct model?
A: Start with the shaft diameter, then check the bearing length, flange diameter, PCD, mounting hole size, dynamic load rating and static load rating according to the parameter table.
Q: Can this bearing be used with any round shaft?
A: It should be used with a shaft that matches the bore size and has suitable hardness, surface finish and straightness. Poor shaft quality can reduce running smoothness and service life.
Q: Can DLY provide the bearing and shaft together?
A: Yes. DLY can help match round flange linear bearings with linear shafts, shaft supports and related linear motion components according to your application requirements.
Need Help Selecting Round Flange Linear Bearings?
Send us your shaft diameter, required model, load direction, stroke length, mounting space and application details. DLY can help confirm a suitable round flange linear bearing and matching linear shaft solution.
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