SKU: PTR05-0708
MPN: 05-0708
The Mandrel 5.000 SBC Alum is a precision crankshaft mandrel engineered for small-block Chevrolet (SBC) engine builders and machine shops requiring accurate alignment and support during crankshaft balancing, grinding, and inspection. This specialized component is essential for professional and serious enthusiast machinists who demand repeatable, precise results when preparing high-performance or stock SBC crankshafts for installation. The 5.000-inch diameter specification makes this mandrel suitable for a range of SBC crankshaft applications, providing the rigidity and concentricity needed to eliminate runout and ensure proper journal preparation.
Manufactured from aluminum by Peterson Fluid Systems, a recognized specialist in engine support equipment, this mandrel delivers lightweight durability without sacrificing dimensional accuracy. The aluminum construction reduces overall fixture weight while maintaining the stiffness required to support the crankshaft during dynamic balancing and precision grinding operations. The 5.000-inch bore diameter is precision-honed to exacting tolerances, allowing it to mount securely on standard balancing equipment and machine center spindles. Its compact footprint—measuring 7.95 inches in length with a 3.8 x 1.9-inch cross-section—enables placement in tight shop environments while providing the necessary purchase surface for reliable clamping and support.
Engine machine shops, speed shops, and restoration facilities benefit most from this mandrel when performing complete crankshaft reconditioning on SBC engines, including 262, 283, 305, 327, and 350 cubic-inch variants. Installation is straightforward—the mandrel slides onto crankshaft pins and journals, centering the crankshaft in the balancing machine or grinding setup with minimal runout. Weighing just 0.44 pounds, it integrates easily into existing shop workflows and storage systems. This tool is indispensable for anyone committed to delivering factory-spec journal dimensions, proper balance, and long-term durability in SBC power plants.
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