Dayton HD1HM Heavy Duty Brake Drum 16.5 x 7 Outboard Mount

The Dayton HD1HM is a heavy-duty outboard mount brake drum engineered for vocational and severe-duty truck applications. This precision-manufactured drum features a 16.5-inch brake surface diameter with a 7-inch wide braking surface, providing reliable stopping power for medium to heavy duty trucks, tractors, and specialty vehicles.

Key Specifications:

• Brake Surface Diameter: 16.5 inches
• Brake Surface Width: 7.0 inches (7.60 inches machined width)
• Drum Mount: Outboard
• Pilot Diameter: 8.78 inches
• Bolt Circle Diameter: 11.25 inches
• Bolt Holes: 10 holes at 1.00-inch diameter
• Overall Height: 10.56 inches
• Machine Balanced: Yes
• Weight: Approximately 118.8 lbs

Cross References: This drum cross-references to OEM numbers including 66884B, 3576AX, and Webb part number 151.6701BA. The HD1HM is specifically designed for vocational and severe-duty applications where enhanced durability is required.

Manufactured by Dayton Parts, a trusted name in heavy-duty truck components since 1922, this brake drum is built to withstand the demanding conditions of commercial trucking operations. The machine-balanced design helps reduce vibration and ensures smooth, consistent braking performance throughout the drum's service life.