LFR Series Guide Rail Track Roller Bearings

Two-point 60° contact track rollers for cylindrical and U-profile guide rails

What Is an LFR Series Track Roller Bearing?

The LFR series track roller bearing is the standard, most widely used linear guide roller in the LFR family. It is engineered around a two-point 60° contact geometry that mates cleanly with either cylindrical rails or U-profile guide rails, delivering smooth motion, low running error, very low noise, and high operating speed.

Thanks to its robust double-row angular contact ball construction with a thickened outer ring (the running surface), the LFR series handles high radial loads while keeping friction and wear low. It is the go-to choice for automation equipment, conveyor systems, packaging machinery, and countless other linear-motion applications where economy, reliability, and interchangeability matter.

Key Features

Technical Specifications

LFR Series — Main Models & Dimensions

Note: Values are for reference only; final parameters are subject to the actual product.

Symbol Key

Sealing Options

Materials & Heat Treatment

Selection Guide

Choosing the right LFR track roller comes down to four questions:

1. Rail type. LFR rollers are designed for cylindrical rails and U-profile rails with a 60° contact angle. For flat (plane) rails, choose the SG series with Gothic-arch four-point contact instead.
2. Radial load vs. life. Match the required basic dynamic load rating (Cr) to your duty cycle. Larger-OD rollers (LFR5206, LFR5207, LFR5208) carry substantially higher Cr and C0r for heavy conveying loads.
3. Speed. Smaller sizes such as LFR50/4 reach up to 21,000 r/min; larger sizes (LFR5208, LFR5308) are limited to roughly 2,300–2,500 r/min. Pick KDD sealing when high speed matters.
4. Environment. Use NPP rubber seals in dusty, humid, or wash-down settings; select stainless steel for food, pharma, or corrosive atmospheres.

When in doubt, an eccentric-bushing variant lets you dial in clearance at installation, which is invaluable for multi-roller carriages on long rails.

Typical Applications

Cross-Reference & Interchangeability

The LFR series follows a widely used naming convention for linear guide track rollers with a 60° gothic-style outer profile. Within that convention, LFR rollers are generally interchangeable with equivalent INA / Schaeffler and SKF track roller series of the same envelope dimensions, and compete dimensionally with counterparts from NSK, NTN, and FAG compact-track-roller ranges. Use the bore (d), outer diameter (D), and width (C) values from the table above to confirm a drop-in match before ordering.

Always verify the full dimension set and load ratings against the manufacturer’s current catalogue before specifying a replacement.

Installation

Eccentric Bushing Mounting (Adjustable Clearance)

1. Fit the eccentric bushing onto the stud/shaft.
2. Rotate the bushing to set the clearance between the roller and the rail.
3. Tighten and lock the retaining screw.
4. Check that motion is smooth and free of binding.

Concentric Stud Mounting (Fixed Clearance)

1. Install the concentric stud onto the shaft.
2. Fix directly — no clearance adjustment needed.
3. Use where the required accuracy is already established.

Recommended Fits

Lubrication & Maintenance

Lubricating Grease

• Type: High-quality multipurpose lithium-based grease
• Properties: Long life, high-temperature resistance, good water resistance
• Service temperature: -30 °C to +120 °C

Maintenance Schedule

FAQ

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