A-A-55617C
TABLE I. DASH NUMBERS AND DIMENSIONS.
A
DASH
WHEEL
WHEEL
MIN. LOAD OVERALL
MOUNTING
SWIVEL
NO.
WIDTH
MATERIAL
CAPACITY
HEIGHT
BOLT
OFFSET
(LBS)
B
DIAMETER
C
.12
RUBBER
200
4
4.00
1.50
METAL
500
5.63
.375
1.50
PHENOLIC
600
±.06
POLYURETHANE
600
RUBBER
400
6
6.00
2.00
PHENOLIC
800
7.50
.375
1.80
POLYURETHANE
800
±.12
METAL
800
RUBBER
500
8
8.00
2.00
PHENOLIC
900
9.50
.375
2.00
POLYURETHANE
900
±.12
METAL
900
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 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 all 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 .625 inch diameter.
The kingpin shall be secured with rivet, or nut and bolt designed that will maintain the proper relationship of
swivel bearing components for the life of the caster under normal operating conditions.
2.2.3 Swivel assembly. The ball bearing assembly shall be bi-level 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 pins. 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.
2.2.7 Metal wheel. Metal wheel shall be fine grain cast iron, steel or aluminum alloy.
2
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