- Core Definition & Engineering Purpose
INA Stud Type Track Rollers (Cam Followers) are integrated bearing systems featuring a hardened, crowned outer ring rotating on a fixed, threaded stud shaft. Engineered to handle high radial loads in confined spaces, they provide smooth rolling contact along tracks, cam profiles, or guide rails while resisting edge forces and contamination. Unlike yoke types, their cantilever design prioritizes radial compactness over moment load capacity.
- Design Anatomy & Key Components
Thick-Walled Outer Ring (Crown):
Material: Case-hardened 100Cr6 bearing steel (60-64 HRC surface)
Profile: Precision-ground spherical crown (standard) or flat (special series)
Function: Direct contact surface for tracks/cams; distributes loads, compensates for minor misalignment (±2°-4°)
Internal Bearing Unit:
Rolling Elements: Needle rollers (high load density) or cylindrical rollers (extreme loads)
Cage: Stamped steel or polymer cage for precise roller guidance
Configuration: Caged (higher speed) or full-complement (max load, low speed)
Integral Stud Shaft:
Material: Heat-treated carbon steel (e.g., C45) or corrosion-resistant variants
Thread: Metric coarse/fine thread (e.g., M6 to M30) with washer face
Mounting: Direct threading into tapped holes or nut-secured
Sealing System (Critical Feature):
Standard: Triple-lip seals with sheet steel reinforcement (2RS suffix)
Performance: IP6X dust protection, water/splash resistance, grease retention
Options: Non-contact shields (Z suffix) for high-speed/low-torque
Eccentric Collar (KRE..-PP / AXW Series):
Function: Allows ±0.5mm radial adjustment via collar rotation
Benefit: Precisely set roller preload against track without shims
VII. Why INA Stud Type Track Rollers?
Precision Grinding: Profile tolerance ±0.05mm for smooth cam tracking
Roller Optimization: Proprietary needle roller crowning reduces edge stress
Seal Technology: Double-layered lips with anti-abrasion additives
Material Integrity: Carburizing depth control (0.8-1.2mm) for impact resistance
Testing: 100% noise testing, sample fatigue validation per ISO 14728
VIII. Industry-Specific Configurations
Agriculture (KRE-PP): Eccentric collar for mud tolerance adjustment
Automation (KRV): Low-torque seals for servo-driven systems
Steel Mills (KT): Cylindrical rollers + high-temp grease (150°C)
Medical (KRIB-FT): Fluoropolymer seals + FDA grease
Conclusion: Engineered for Confined-Space Precision
INA Stud Type Track Rollers deliver unmatched radial load capacity in minimal radial space, making them ideal for cam systems, linear guides, and pivoting joints where envelope constraints rule. Their cantilever design demands careful attention to moment loads but rewards with simple installation and adjustability. From KR-series economy models to heavy-duty KT cylindrical variants and precision-adjustable KRE-PP, INA’s engineered solutions ensure reliable performance in packaging, automation, mobility, and industrial machinery. When selecting, prioritize load path alignment, housing perpendicularity, and environmental sealing to maximize service life. INA’s metallurgical expertise and sealing innovations make these components the benchmark for demanding motion systems.
