LFR50/8-8KDD U-Groove Track Roller Bearing | 8x24x11mm Double Row Guide Roller Supplier
High precision LFR50/8-8KDD Gothic arch track roller bearing, double metal KDD shields, size 8*24*11mm for 8mm round guide shaft. Double row angular contact ball structure, low noise & high load capacity for linear sliding rail, CNC machine, automation equipment. Factory direct supply, OEM customization, large inventory fast shipping. Get wholesale quotation now.
Introduction to LFR50/8-8KDD（NPP) U-Groove Track Roller Bearing
The LFR50/8-8KDD track roller bearing belongs to the mature LFR linear guide roller series, one of the most cost-effective Gothic arch U-groove guide rollers widely adopted in light-duty linear motion industries. Sized at 8mm bore, 24mm outer diameter and 11mm width, this bearing matches perfectly with 8mm solid round guide shafts, delivering stable linear movement for sliding, conveying and positioning mechanisms.
Different from ordinary single-groove bearings, LFR50/8-8KDD features a special Gothic arch outer ring profile that forms two contact points at 60° with the cylindrical guide shaft during operation. This structural design disperses pressure evenly, eliminates edge load concentration caused by installation tolerance, greatly reducing friction loss and running noise, while supporting higher linear speed up to 20000 r/min.
Equipped with double-sided KDD metal dust shields, LFR50/8-8KDD provides reliable dustproof performance for indoor clean working environments, preventing fine powder and particles from entering the internal rolling assembly to prolong bearing service life. The internal double row angular contact ball layout enables the roller to withstand both radial load and bidirectional axial load, making it far more stable than single-row groove bearings under offset force conditions.
Material & Production Craft of LFR50/8-8KDD
Our LFR50/8-8KDD U-groove roller bearing is fully manufactured with high-grade GCR15 chrome bearing steel, the standard material for precision motion bearings. After overall quenching and tempering heat treatment, the bearing ring and steel balls reach stable hardness and excellent wear resistance. All inner bore, outer circle and U-groove surfaces go through multi-process precision grinding to guarantee dimensional tolerance and smooth rolling contact surface.
Every LFR50/8-8KDD bearing is pre-filled with industrial multi-purpose lithium grease before sealing, which features wide temperature adaptability and anti-oxidation performance. For special working scenarios like high temperature or dust-heavy workshops, we can customize high-temperature grease or upgrade NPP rubber contact seals to replace standard KDD metal shields according to client requirements.
Core Performance Advantages of LFR50/8-8KDD
- Superior load capacity: Double row ball structure with thickened outer ring, dynamic load up to 3.67KN, static load 2.28KN, suitable for medium light load linear motion
- Low noise & energy saving: 60° dual-point contact minimizes friction, smooth silent operation to lower equipment power consumption
- Good dust protection: KDD double metal shields block dry dust, reduce maintenance frequency
- Compact integrated structure: Non-separable assembly, easy direct installation on fixed shafts without extra accessories
- Strong compatibility: Standard 8mm inner bore fits universal 8mm round guide shafts, interchangeable with mainstream brand LFR50/8 series rollers
- Cost-efficient mass supply: Mature mass production process, stable stock, competitive factory wholesale price for bulk orders
Standard Technical Parameters of LFR50/8-8KDD
Model: LFR50/8-8KDD
Internal bore d: 8 mm
Outer diameter D: 24 mm
Total width B: 11 mm
Matching guide shaft: Φ8mm cylindrical shaft
Sealing system: KDD double metal dust shield
Rolling structure: Double row angular contact ball bearing
Dynamic load rating Cr: 3.67 Kilonewton
Static load rating C0r: 2.28 Kilonewton
Permissible maximum rotating speed: 20000 r/min
Single bearing weight: 24 grams
Raw material: GCR15 Chrome Bearing Steel
Standard lubricant: Long-life multipurpose lithium grease
Main Application Industries for LFR50/8-8KDD
The versatile LFR50/8-8KDD U-groove track roller bearing covers multiple light automation and mechanical fields:
- Furniture hardware: Sliding door, wardrobe drawer, cabinet linear guide rollers
- Automation equipment: Small conveyor track, automated assembly line positioning roller
- Precision machinery: Mini CNC linear rail, testing equipment sliding mechanism
- Packaging & printing machinery: Film feeding track, printing head guide components
- Textile machinery: Yarn guide rail, fabric conveying small rollers
- Logistics equipment: Light-duty sorting sliding track, warehouse transfer guide parts
Customization & Factory Supply Support
As a professional LFR series track roller bearing manufacturer, we provide one-stop supply service for LFR50/8-8KDD:
– Large spot inventory: Thousands of pieces ready for immediate shipment within 1–3 working days
– OEM customization: Custom laser marking, neutral export packaging, customized lubricant & seal types
– Small batch support: Accept MOQ 100 pcs for trial order, flexible production for large bulk orders
– Full quality control: Each batch undergoes dimensional inspection, noise test and load detection before delivery
– Professional technical consultation: Our engineering team offers matching guidance for guide shaft and equipment structure design
FAQ
Q1: What is the difference between LFR50/8-8KDD and LFR50/8-8NPP?
A: KDD stands for double metal dust shield, suitable for clean indoor environments with high speed; NPP is double rubber contact seal, better waterproof and anti-fouling for dusty or slightly humid workshops, with lower max rotating speed.
Q2: Can LFR50/8-8KDD work with shafts other than 8mm?
A: This model’s U-groove is specially designed for Φ8mm round shafts; if you need to match other shaft diameters, please choose corresponding LFR series models with different groove sizes.
Q3: Is re-lubrication required during use?
A: Standard LFR50/8-8KDD is pre-filled with long-life grease, no re-lubrication needed under normal indoor working conditions. For continuous high-load operation, periodic supplementary lubrication can extend service life.