2024100000120
Inboard Spindle Seal
SAF-Holland

Inboard spindle sealing components form a critical barrier within hub and bearing housings, preventing grease loss while protecting bearings from road spray and particulate contamination. This seal resists washout from lubrication systems, thermal cycling, salts, and hydraulic fluids encountered in heavy-truck axle assemblies, helping to maintain a stable lubricant film and minimize metal-to-metal wear. The design supports smooth rotation with tight tolerances to reduce friction and noise under load, preserving bearing life and wheel-end reliability. By limiting grease escape into brake components and surrounding structures, it contributes to cleaner brake drums and more consistent stopping performance. The VMRS code 018-002-011 identifies this element within the hub and bearing system category, guiding service providers toward compatible North American hub configurations. Applications span front and rear hub assemblies on tractors and trailers, where spindle seals are essential for maintaining grease containment and protecting bearing integrity across road conditions, climates, and long service intervals. Proper installation seating and compatibility with adjacent seals and grommets are key to achieving enduring performance in wheel-end maintenance programs.