Air Brake Spider Assembly Pilot Diameter:5.50 in.
SKU: A3211Y7253
Air Brake Spider Assembly Pilot Diameter:5.50 in.
This heavy-duty Air Brake Spider serves as the critical foundation for S-cam air brake systems. As the structural anchor point of the wheel-end brake assembly, it is precision-machined to ensure perfect alignment and rigid mounting for the brake shoes, anchor pins, and camshaft bracket assembly.
Constructed from premium, high-grade cast steel (or forged steel, depending on OEM application), this spider maximizes braking efficiency by preventing flexing under severe torque loads, ensuring uniform lining-to-drum contact, and reducing uneven brake wear.
Key Features & Benefits
Maximum Structural Rigidity: Built from high-strength, fatigue-resistant steel to eliminate deflection during heavy or emergency braking events.
Precision Machined Tolerance: Engineered for exact alignment of anchor pin holes and camshaft journals, ensuring smooth shoe deployment and release.
OEM Compatibility: Designed to meet standard commercial axle specifications, matching standard 16-hole bolt circles and pilot diameters.
Common Brake Diameter: Fits standard 16.5" drum brake assemblies.
Mounting Configuration: Standard 16-hole bolt circle.
Material: Heavy-duty cast iron or forged steel.
Installation Note: It is highly recommended to inspect axle flanges and use new grade-8 mounting hardware when replacing a brake spider assembly to ensure proper torque retention and vehicle safety.
| Freightliner | Argosy, Cascadia, Cascadia 113, Cascadia 125, Century, Classic, COE, Columbia, Coronado, FL106, FL112, FL50, FL60, FL70, FL80, FLA, FLC, FLD112, FLD112 (Set back Axle), FLD120, FLD120 SD, FLD132, International MV, M2, M2 106 |
| Kenworth | C500, K100, K300, T170, T2000, T270, T300, T370, T400, T450, T600, T660, T680, T700, T800, T880, W900, W900A, W900B, W900L, W990 |
| Peterbilt | 320, 325, 330, 335, 337, 348, 357, 359, 362, 365, 367, 375, 376, 377, 378, 379, 384, 386, 387, 388, 389, 567, 579, 587 |
| International | 1452FC, 1452SC, 1652SC, 1652UPS, 2554, 2574, 2575, 2654, 2674, 2675, 3000, 3800, 4000, 4100, 4100 SBA, 4200, 4200 LP, 4300, 4300 LP, 4400, 4400 LP, 4600, 4600 LP, 4600 UH, 4700, 4700 LP, 4700 LPX, 4800, 4900, 5500i, 5600i, 5900i, 7100, 7300, 7600, 8100, 8200, 8300, 9200, 9200i SBA, 9300, 9400, 9400i SBA, 9600, 9670, 9700, 9800, 9800 SBA, 9800 SFA, 9900, CE200, CE300, LoneStar, LT Series, MV, Paystar 5900, Prostar, TranStar 8500 &8600, Workstar 7600 &7700 |
| Volvo | VN, VN2, VNL, VNM, WIA & White GMC |
| Mack | CH, CHN, CV, CXN, Granite, MD, Pinnacle (Vision Elite), R600 & R700, RD, RH, Vision |