A-A-50476B
5. Brushes. Each polisher shall be furnished with one set of brushes for polishing and one set for scrubbing. Brushes shall be circular and in one piece. The diameter of brushes shall conform to table I. The machine shall be so constructed that brushes may be replaced without the use of special tools.
Table I. Class B machines, polishing and scrubbing, electric, concentrated weight, two-brush.
|
Size |
Overall diameter of brush fiber (minimum) |
Total polishing brush fiber area (minimum) |
Continuous rating of motor |
Weight of machine complete with two brushes |
Wheel diameter (minimum) |
|
|
mm |
mm2 |
Watts |
Kg |
mm |
|
1 |
180 |
45,000 |
375 |
27 to 48 |
76 |
|
2 |
250 |
87, 000 |
560 |
52 to 80 |
90 |
6. Polishing brushes. The sectional polishing brushes shall have a thickness or not less than 20 milliliters (mm). Each brush shall have a suitable reusable metal plate securely attached to it. Polishing brush tufts shall be made of approximately 60 percent Tampico and 40 percent well-mixed palmyra fiber. The tufts shall have a free length of not less than 38 mm when measured at right angles to the surface of the brush block.
7. Scrubbing brushes. Scrubbing brushes shall be the same as specified for polishing brushes but may have a heavy metal back and the tufts shall be made of 100 percent palmetto or 100 percent bassine fiber.
8. Bumper. A replaceable rubber or vinyl bumper of not less than 20 mm in vertical direction shall be securely attached around the portion of the motor housing and the brush housing. The bumper shall not dent or mark objects with which it comes in contact.
9. Wheels. The wheels shall be capable of retracting during operation and the entire weight of the machine shall rest on the brushes.
11. Electrical characteristics. Unless otherwise specified, the polisher shall be designed to operate on 120 volts, alternating current, 60 Hertz, single phase. All wiring, cord, plug, and grounding shall be in accordance with UL 561. A 3-conductor cord of not less than 15 meters shall be provided. Polisher shall have a quick break switch for starting and stopping the motor. The switch shall automatically open the motor circuit the moment the operator releases the handle of the machine. The grounding conductor in the cable assembly shall form a continuous conductor path from the point of attachment on the motor housing to the wall receptacle when the machine is connected and ready for operation. The grounding path shall not incorporate any movable joints.
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business