A-A-55619C
TABLE I. DASH NUMBERS AND DIMENSIONS.
A
MOUNTING
DASH
WHEEL
WHEEL
MIN. LOAD OVERALL MOUNTING
SWIVEL
PLATE
NO.
WIDTH
MATERIAL
CAPACITY HEIGHT
BOLT
OFFSET
DIMENSION
(LBS)
B
DIAMETER
C
.06
±.12
RUBBER
540
SEE
6
6.00
2.50
PHENOLIC
1600
7.50
.500
1.80
FIGURE
POLYURETHANE
1620
3
METAL
2000
RUBBER
670
SEE
8
8.00
2.50
PHENOLIC
2000
10.50
.500
2.50
FIGURE
POLYURETHANE
2000
4
METAL
2000
RUBBER
790
SEE
10
10.00
3.00
POLYURETHANE
2000
12.50
.500
2.56
FIGURE
4
PHENOLIC
2300
METAL
2500
2.1.1 Rigid caster. Rigid caster has a rigid horn and wheel assembly permitting only straight line travel.
2.1.2 Swivel caster. Swivel caster has a swivel horn and wheel assembly that will rotate freely through
360.
2.2 Mounting plate and horn assembly. The mounting plate and horn assembly shall be made of steel
plate, cast or forged steel, or aluminum. The horn legs shall be either an integral part of the horn plate or
welded thereto. The area adjacent to mounting holes shall have sufficient clearance to allow mounting
hardware installation to provide for clearance for intended operations.
2.2.1 Finish. Except for aluminum, exposed metal surfaces of the caster assemblies shall be zinc plated
per ASTM B633, Type II or III, SC2.
2.2.2 Kingpin. The kingpin for swivel casters shall be constructed of steel with minimum 1.00 inch
diameter. The kingpin shall be secured with slotted adjusting nut and cotter pin so that in swiveling it will
not rotate in frictional contact with component members of the swivel bearing assembly.
2.2.2.1 Kingpinless (optional). Kingpinless swivel caster design shall have three (3) inches minimum
diameter raceway which measured from center of ball bearing to center of ball bearing at 180º apart.
2.2.3 Swivel assembly. The ball bearing assembly shall be bi-level for kingpin caster and single row of
balls for kingpinless caster with a smooth non-binding operation. The raceways shall be smooth and full-
case hardened and shall be filled to capacity with commercial quality steel ball bearings.
2.2.4 Axle. The axle shall be constructed of steel and shall secure the wheel by means of a locknut or
slotted nut and pin. During operation, the axle shall not rotate loose or bind the wheel.
2.2.5 Wheel bearing. The wheel bearing shall be commercial type ball or roller bearings designed and
manufactured in accordance with the best standard manufacturing practice for the intended purpose.
2.2.6 Wheel hardness. Except for metal and phenolic wheels, the hardness of treads shall be 70 5 points
for rubber and 92 5 points for polyurethane, as measured on the face of the treads by a type A shore
durometer. Electrically conductive treads shall have a hardness of 80 5 points.
2
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