Product Description
Webb 61780F 16.5 x 7 Heavy-Duty Inboard Brake Drum – 120754 / 51961-10 / Gunite 2577A
The Webb 61780F is a 16.5 x 7-inch cast-iron brake drum with an inboard mounting configuration. It features an 11.00-inch pilot, 12.50-inch bolt circle, and 5/6-hole mounting pattern with 0.66-inch mounting holes.
The 120754 and 51961-10 numbers in the inventory description are established interchanges for the 61780F. Gunite 2577A is another useful interchange for identifying this drum.
Part Number: 61780F
Base Part Number: 61780
Product Type: Heavy-Duty Brake Drum
Brand: Webb
Brake Size: 16.5 x 7 in.
Brake Surface Diameter: 16.50 in.
Brake Shoe Width: 7.00 in.
Brake Surface Flat: 7.40 in.
Overall Depth: 8.50 in.
Mounting Type: Inboard
Drum Type: H
Material: Cast Iron
Finish: Standard Finished / Unbalanced
Pilot Diameter: 11.00 in.
Bolt Circle Diameter: 12.50 in.
Bolt Hole Configuration: 5/6
Bolt Hole Diameter: 0.66 in.
Back Plate Thickness: 0.50 in.
Maximum Wear Diameter: 16.62 in.
Outside Diameter: Approximately 18.74 in.
Approximate Weight: 108 lb
ABS Tone Ring Included: No
Outer Cooling Fins: No
Meritor / Dayton Cross References: 120754, 03-120754-002, 120152, 122328, 122329
KIC / Reyco Cross References: 51961-10, 51961-11, 52221-01
Gunite Cross References: 2577A, 2176A, 2177A, 3143
Motor Wheel Cross References: 85978, 86788, 86989, 87109, 87113, 87435
Automann Cross Reference: 151.6702
DuraBrake Cross Reference: 16149
Additional Cross References: 65718, 821-9123, 97086, X-60039, X-60167, X-60700
Supersedes Webb: 61778F, 61792F
Inventory Description: DRUM 120754 51961-10
Before ordering, confirm Webb 61780F or a verified interchange and compare the 16.5 x 7 brake size, 11.00-inch pilot, 12.50-inch bolt circle, 5/6-hole pattern, 0.66-inch mounting holes, 8.50-inch overall depth, and inboard mounting configuration with the existing drum.