Hadco axles are manufactured from the finest quality C1040 hot rolled steel. When greater strength is required due to excessive overhang, axles can be made on special order from 4140 hot rolled alloy steel. Axle spindle dimensions are shown in hub series section. Axle capacity cannot exceed the spindle capacity. All axles are furnished complete with spindle nuts, washers and cotter pins, and Z rings where required.
All axle and axle component capacities are based upon gross load measured at the ground.
All Hadco straight axles over 70 inches long (2&1/4" sq or less) will be cambered 1&1/2° (Nominal) at center unless otherwise requested. Steering axles are cambered 1&1/2° (Nominal) at the spindle. All dropped axles are cambered 1&1/2° (Nominal) at the drop.
Track is the distance in inches from tire centerline to tire centerline on axle assemblies with single tires. On duals, track is measured at the centerline between the dual tires.
TRACK VS. AXLE LENGTH
A = distance from outside of hub flange to end of axle in inches. (See drawings on hub series pages for this dimension.)
Dish= the distance between the centerline of the tire and the hub face in inches. (May be positive or negative. Positive dish is shown at right.) (See wheel charts for this dimension.)
Difference between track and axle length
= 2A + 2 Dish (positive dished wheels)
= 2A - 2 Dish (negative dished wheels)
Difference between track and axle length is shown in hub series charts.
TRACK VS. OUTSIDE TIRE WIDTH
Outside tire width of axle assemblies with single tires is track plus the width of one tire plus one (1) inch allowance for camber.
Overhang for axles with single tires is the distance from the centerline of the spring to the centerline of the tire.
Overhang for axles with dual tires is the distance from the centerline of the spring to the centerline of the duals.
OVERHANG VS. AXLE CAPACITY
Axle beam carrying capacity is reduced as the overhang is increased. See Axle Beam Capacity Chart.