Product Description
Webb 66665B 18 x 7 Balanced Heavy-Duty Outboard Brake Drum – 10 Hole
The Webb 66665B is an 18 x 7-inch balanced cast-iron brake drum with an outboard mounting configuration. It features an 8.78-inch pilot diameter, 11.25-inch bolt circle, and 10-hole mounting pattern.
The 18-inch brake surface is the key identifying feature of the 66665B, separating it from the more common 16.5-inch heavy-duty drums. Webb supplies the 66665B as a balanced drum, and the 10 mounting holes measure 1.00 inch in diameter.
Part Number: 66665B
Product Type: Heavy-Duty Brake Drum
Brand: Webb
Brake Size: 18 x 7 in.
Brake Surface Diameter: 18.00 in.
Brake Surface Flat: 7.38 in.
Overall Depth: 10.37 in.
Mounting Type: Outboard
Drum Type: K
Material: Cast Iron
Balance: Balanced
Pilot Diameter: 8.78 in.
Bolt Circle Diameter: 11.25 in.
Bolt Holes: 10
Bolt Hole Diameter: 1.00 in.
Back Plate Thickness: 0.50 in.
Maximum Wear Diameter: 18.24 in.
Approximate Weight: 147 lb
Automann Cross Reference: 151.8704BA
Eaton Cross Reference: 974556
Volvo Cross References: 3915901, 8098794
Additional Cross References: X-61210, X-61310
Inventory Description: 18 DRUM 10 HOLE
Before ordering, confirm the 66665B number or a verified interchange, along with the 18 x 7 brake size, 8.78-inch pilot, 11.25-inch bolt circle, 10-hole pattern, 1-inch mounting holes, and outboard mounting configuration to ensure proper fit.