Track Roller Needle Roller Bearings

1. Main Classifications of Track Roller Needle Roller Bearings

1.1 Classification by Structural Form (Core Classification)

1. Cam Follower Bearings (CR / CRF Series)

   Bolt shaft integrated structure, available in full-complement needle roller and caged needle roller types, including eccentric shaft, spherical outer ring and cylindrical outer ring specifications, ideal for cam drive and reciprocating motion applications.
2. Support Roller Bearings (NATR / NART / NUTR Series)

   Bolt-shaft-free design with double-end seals and thickened reinforced outer rings, featuring excellent shock resistance and heavy-load bearing capacity, available with cages or full-complement rollers as required.
3. Curved Track Roller Bearings (KR / KRV / KRVE Series)

   Adopting thin-wall outer rings and high-strength bolts, specially designed for high-speed reciprocating and curved motion; dustproof sealed and clearance-optimized customized versions are available.
4. Full-complement Cageless Track Roller Bearings

   Fully arranged needle rollers for extreme load capacity, low-speed heavy-load performance and superior compression resistance, the optimal choice for heavy machinery.
5. Caged Track Roller Bearings

   Isolated cage structure effectively reduces friction and improves heat dissipation, suitable for medium and high-speed operation to extend service life.
6. Double-row Track Roller Bearings

   Double-row needle roller layout doubles radial load capacity and enhances rigidity, specially developed for large-scale mechanical equipment.

1.2 Other Classifications

• By outer ring shape: Cylindrical, spherical, arc-shaped and thickened reinforced outer rings

• By sealing type: Open type, double-sided 2RS rubber seal, metal shield seal, composite dust and water-proof seal

• By mounting structure: Integrated bolt type, split sleeve type, eccentric adjusting structure type

2. Structural Composition of Different Types

• Cam Follower & Curved Track Rollers (KR / CR Series)

  Composed of high-strength quenched and tempered bolt shafts, single/double-flanged outer ring rollers, precision needle rollers, engineering plastic or stamped cages, sealing rings, lock nuts and gaskets, balancing installation stability and transmission accuracy.
• Support Rollers (NATR / NUTR Series)

  Mainly consist of thickened load-bearing outer rings, inner rings/sleeves, needle rollers and cages, equipped with bilateral seals and limit ribs to strengthen heavy-load support and sealing protection.
• Full-complement Heavy-duty Rollers

  Cage-free design with integrally thickened outer rings, full-length precision needle rollers, fixed ribs and sealing assemblies to maximize load capacity and compression resistance.
• Double-row Track Rollers

  Widened thickened outer rings, two independent needle roller sets, double cages, double seals and integrated reinforced core shafts achieve doubled radial load capacity to meet high rigidity requirements of large equipment.

3. Core Quality Standards

1. Dimensional Accuracy: Strictly control outer ring outer diameter, cylindricity, concentricity, end face parallelism and roller fit clearance for smooth operation and low runout.

2. Load Capacity & Rigidity: Optimize outer ring wall thickness and needle roller size ratio to enhance structural impact resistance and static/dynamic load performance.

3. Wear Resistance & Fatigue Resistance: Control surface roughness, hardened layer depth and residual stress to avoid peeling, pitting and abnormal wear.

4. Operational Performance: Classified needle rollers and optimized cage tolerance reduce friction, temperature rise and operating noise for medium and high-speed operation.

5. Sealing Performance: High-fitting sealing lips with anti-aging materials realize full protection against water, dust, cutting fluid and oil contamination.

6. Impact Resistance & Operational Stability: Strengthen outer ring compression resistance and bolt shaft mechanical properties with anti-loose structure design for vibration and impact working conditions.

7. Uniform Service Life: Stable batch production process, standardized clearance and long-lasting lubricant ensure consistent product durability and lower maintenance costs.

4. Material and Heat Treatment Specifications

Core Component Materials

• Outer rings/rollers: GCr15, SUJ2, 100Cr6 high-carbon chromium bearing steel for standard use; 20Cr2Ni4A carburized bearing steel for heavy-load models.

• Needle rollers: GCr15 bearing steel with precise grading for high precision and wear resistance.

• Core shafts/bolt shafts: 40Cr, 42CrMo alloy structural steel with high strength and bending resistance.

• Cages: Stamped cold-rolled steel sheet, glass fiber reinforced PA66; brass cages for high-temperature scenarios.

• Seals: Standard NBR nitrile rubber; FKM fluororubber for high temperature and chemical corrosion resistance.

Heat Treatment Process

• Outer rings and needle rollers: Overall quenching and low-temperature tempering, hardness HRC 60~64 for excellent wear resistance.

• Carburized steel parts: Carburized layer thickness 0.8~2.0mm, surface hardness HRC 58~62 with sufficient core toughness to prevent fracture.

• Core shafts and bolts: Integral quenching and tempering for overall toughness, plus high-frequency surface quenching to enhance surface wear resistance.

• Auxiliary processes: Precision grinding, cryogenic stabilization, phosphating, blackening and galvanizing to eliminate internal stress, prevent deformation and improve rust resistance for harsh outdoor and humid environments.

5. Application Fields

• Automation & Non-standard Equipment: Assembly lines, guide rail mechanisms, transfer manipulators, linear slides and cam transmission structures.

• Construction Machinery & Logistics Storage: Forklift side rollers, stacker walking wheels, elevator guide wheels and port heavy-duty conveying equipment.

• Packaging, Printing & Textile Machinery: Cam mechanisms, reciprocating components, high-speed cutting equipment and textile transmission parts.

• Automotive Industry: Body fixtures, stamping die followers, transmission auxiliary parts and new energy vehicle conveying mechanisms.

• Molds & Machine Tools: Guide pin followers, machine tool guide supports and heavy-duty tooling fixtures.

• Other fields: Agricultural machinery, amusement facilities and light industrial machinery.

6. Core Advantages of BAUZEM Track Roller Bearings

1. German-grade Precision Craftsmanship

   Adopt European manufacturing standards, super-finished outer rings and micron-level sorted needle rollers for low noise, low runout and smooth operation with superior dimensional consistency.
2. Premium Materials & Mature Heat Treatment

   Imported high-grade bearing steel and customized quenching & cryogenic stabilization process ensure uniform hardened layer, low internal stress and outstanding anti-pitting and anti-deformation performance.
3. Complete Full-range Product Line

   Covers cam followers, support rollers, curved rollers, full-complement heavy-duty and double-row reinforced types to meet universal replacement demands across all industries.
4. High Load Capacity & Strong Shock Resistance

   Thickened reinforced outer rings, high-strength alloy bolt shafts and optimized roller layout greatly improve compression resistance, vibration resistance and impact resistance.
5. Multi-specification Long-lasting Sealing System

   Equipped with anti-aging standard seals and optional high-temperature fluororubber seals for effective dustproof, waterproof and oil-proof effects, extending maintenance-free cycle.
6. Wide Temperature Adaptability

   Custom composite long-life grease ensures stable operation from -40℃ to 120℃ without grease loss or hardening.
7. Long Service Life & Cost Reduction

   1.5~2 times longer service life than ordinary domestic bearings, reducing equipment downtime and replacement frequency to cut overall operating costs.
8. Powerful Customization & Technical Support

   Support non-standard outer diameter, thickness, clearance, eccentric structure and special anti-rust/high-temperature customization, providing complete selection guides and working condition matching solutions.
9. Strict Quality Control & Global Compatibility

   All products pass batch inspection, life sampling and load verification in line with international industrial standards, suitable for cross-border transportation and long-term storage.
10. Maintenance-free Lightweight Design

    Optimized cage structure lowers friction and temperature rise; lightweight high-strength structure balances rigidity and energy saving for energy-saving requirements of high-speed automated equipment.