INA Yoke Type Track Rollers: Heavy-Duty Stability for Demanding Industrial Motion
(Technical Analysis for Bearing Catalogs & Machine Design)
- Engineering Definition & Core Advantage
INA Yoke Type Track Rollers (clevis-type cam followers) feature a straddle-mounted yoke fork that distributes loads symmetrically across two support points. This design delivers exceptional resistance to overturning moments and edge forces – making them the premier solution when load stability outweighs space constraints. Unlike stud-type rollers, they transform bending stress into shear stress for unparalleled durability in shock-intensive applications.
- Performance Advantages Over Stud Types
Moment Load Superiority
KRVU 40 handles 2,100 Nm overturning moment vs. 450 Nm for equivalent stud type
Symmetric load path reduces bearing edge stress by 60%
Shock Resistance
Pin shear strength >700 MPa vs. stud bending failure risk
Forged yoke absorbs 3x higher impact energy
Maintenance Efficiency
Pin replacement without disassembling adjacent components
Centralized lubrication ports accessible from yoke side
- Critical Applications & Industry Solutions
Construction & Mining
Excavator bucket linkages (KRVU 50: 380 kN radial + 4,500 Nm moment)
Rock crusher guide systems with eccentric adjustment (KRVPP)
Material Handling
Port crane trolleys (KUKU 60 flat rollers on hardened rails)
Automated warehouse shuttles (YEL stainless for humid environments)
Energy Sector
Hydraulic turbine blade adjusters
Wind turbine pitch control bearings (DNV-GL certified variants)
Metal Processing
Continuous casting guide rolls (water-cooled customizations)
Rolling mill entry tables (high-temp KUKU-F versions)
VII. INA Proprietary Technologies
Asymmetric Yoke Design (Patented): 20% thicker load-side leg in KRVPP series
Roller End Relief: Logarithmic profile extends needle roller life by 30%
Multi-Chamber Seals: Isolated contaminant expulsion channels
Carburizing Control: Computerized atmosphere furnaces for 1.5±0.1mm case depth
- Why Engineers Specify INA Yoke Rollers?
Rigidity: 70% less deflection than stud types under 10 kN edge load
Longevity: 60,000-hour L₁₀ life in ISO 4406 Class 7 environments
Certifications: ISO 9001, API 6A (oil/gas), FDA-compliant options
Customization: Bore modifications, specialty coatings, sensor integration
Global Testing: Salt spray 1,000+ hrs (ASTM B117), dust chamber per ISO 12103
Conclusion: The Ultimate Solution for Uncompromised Load Stability
INA Yoke Type Track Rollers deliver unmatched resistance to moment loads and edge forces through their straddle-mounted design. The KRVU series sets the standard for general heavy-duty applications, while KUKU flat rollers enable precision tracking on ground surfaces. With innovations like the adjustable KRVPP and corrosion-resistant YEL variants, INA provides engineered solutions for excavators, cranes, metal processing, and energy infrastructure. When radial space permits, yoke types outperform stud rollers in shock-intensive, moment-loaded, or misalignment-prone applications – reducing maintenance costs and eliminating catastrophic failures.
