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Home > Linear Bearings

Linear bearings (also named linear ball bushings) are core linear motion components matched with hardened linear shafts to deliver unlimited-stroke straight movement with low rolling friction, widely adopted in automation equipment, CNC routers, 3D printers, packaging machinery, medical instruments and semiconductor equipment. Compared with plain sliding bushings, recirculating ball linear bearings feature smooth running, high positioning repeatability, stable friction coefficient at different speeds and easy lubrication maintenance. Standard metric and imperial dimension options support global equipment replacement.

Main Types & Features

 

tandard Cylindrical Linear Bearing (UU)

Standard Cylindrical Linear Bearing (UU)

The most general-purpose type, compact cylindrical structure, double rubber seals prevent dust and grease leakage. Suitable for normal indoor working conditions, pressed into housing blocks directly.

Applications: General automation axes, housing blocks, standard linear motion

Flanged Linear Bearing (LMF / LMK / LMH)

Flanged Linear Bearing (LMF / LMK / LMH)

Integrated flange design for bolt mounting without extra positioning shoulder. Round flange (LMF), square flange (LMK) and low-profile oval flange (LMH) meet different space layout requirements.

Applications: Vertical panel installation, compact machine layouts

Open Type Linear Bearing (OP)

Open Type Linear Bearing (OP)

Split outer cylinder structure, designed for shaft support rail systems. The open gap avoids interference with shaft support brackets.

Applications: Long-axis gantry machines, supported-shaft systems

Adjustable Clearance Linear Bearing (AJ)

Adjustable Clearance Linear Bearing (AJ)

Slit outer sleeve with adjustable preload. Users can tune internal clearance to eliminate backlash and improve motion rigidity for high-precision positioning scenes.

Applications: High-precision positioning, backlash-free linear slides

Long Type Linear Bearing (LUU)

Miniature Ball Bearing

Extended bushing body with more ball circuits. Higher load capacity and stronger moment resistance than standard short models.

Applications: Large radial load, tilting torque conditions​​​​​​​

Key Advantages

Low friction — sensitive, smooth linear motion                                                        Interchangeable — standard metric & inch dimensions

Multiple seals — open, single seal, double lip seal                                                   Rich variants — compact mounting, preload adjustment, corrosion protection

Low noise — long service life under proper lubrication                                            Global support — standard replacements for worldwide equipment

Applications: automation transfer systems, CNC machine accessories, robotic sliding axes, 3D printing frames, inspection testing jigs, food & packaging machines, medical linear slides.