Product Description
Webb 66661B 16.5 x 7 Severe-Service Balanced Outboard Brake Drum
The Webb 66661B is a 16.5 x 7-inch severe-service cast-iron brake drum with an outboard mounting configuration. It is machine balanced and features an 8.78-inch pilot diameter, 11.25-inch bolt circle, and 10-hole mounting pattern.
The 66661B is Webb's severe-service drum for wheel ends that otherwise use the 66884 drum family. Compared with a standard 16.5 x 7 drum, the 66661B is substantially heavier at approximately 136 lb. Gunite 3576X is one of its most common interchange numbers.
Part Number: 66661B
Product Type: Severe-Service Heavy-Duty Brake Drum
Brand: Webb
Brake Size: 16.5 x 7 in.
Brake Surface Diameter: 16.50 in.
Brake Surface Flat: 7.46 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: 16.62 in.
Approximate Weight: 136 lb
ABS Tone Ring Included: No
Outer Cooling Fins: No
Gunite Cross Reference: 3576X
Eaton Cross Reference: 974643
Meritor Cross Reference: R930001
KIC Cross Reference: 54267-018
Navistar / Fleetrite Cross References: W66661B, FLT4476B
Additional Cross References: 16783, X-61307, ZBR3576, 10037819
Related Webb Drum: 66884B / 66884F
Inventory Description: SEVERE DUTY (66864)
Before ordering, confirm the 66661B number or a verified interchange, along with the 16.5 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.
