Hourglass Spacer 3/4in ID x1in Long Steel

The Hourglass Spacer 3/4in ID x 1in Long Steel from ALLSTAR PERFORMANCE is a precision engineered component designed for engine builders, fabricators, and performance mechanics who demand accuracy in crankshaft, alternator, and accessory mounting applications. This versatile spacer addresses the need for precise axial positioning when stacking multiple components on a single shaft or bolt, eliminating unwanted side-to-side movement that can compromise alignment and accelerate wear on bearings and seals.

Manufactured from hardened steel and precision-turned to exacting tolerances, this 3/4-inch inside diameter spacer accommodates standard automotive shaft applications and maintains its dimensional integrity under thermal cycling and vibration. The hourglass geometry—wider at both ends with a necked-down center section—distributes load evenly while minimizing contact pressure at the bearing surface, reducing fatigue stress on shafts and fasteners during high-RPM operation.

This spacer is ideal for restorers, hot rodders, and anyone involved in custom automotive builds where precise spacing is critical. The 1-inch length provides moderate spacing capability for applications such as alternator pulley stacks, crankshaft damper assemblies, or custom belt-driven accessory clusters where every millimeter of space matters.