The Mercury 1302 is the workhorse scrub brush for 13-inch rotary floor machines: an 11-inch bassine block with 1.75-inch bristles and the Mercury Type B 92 clutch plate already fitted. Janitorial crews and in-house maintenance departments buy it for the floors that a pad cannot handle, which in most buildings means the back of house.
Bassine is a natural coarse fiber. It is stiffer and more aggressive than a pad face, which is exactly what a quarry-tile kitchen floor, a textured concrete loading dock or a safety-surfaced restroom needs. A pad rides across texture and cleans the high points; stiff bristles reach down into it.
Built for
- Quarry tile and safety-textured floors in commercial kitchens and food service
- Unsealed and textured concrete in shops, docks, warehouses and mechanical rooms
- Restroom and locker room floors where grout lines hold soil
- Garage, entryway and vestibule concrete carrying tracked-in grit
- General scrubbing with detergent on any rough surface a pad glides over
Getting the size right
The most common ordering error on rotary brushes is matching the brush number to the machine size. The 1302 is described as an 11-inch brush because the block is 11 inches. Under the weight of the machine, the 1.75-inch bristles splay outward and the actual cleaning path comes out near 13 inches, which is why this is the correct brush for most 13-inch floor machines. Mercury's 1502 covers 15-inch decks and the 1702 covers 17-inch decks on the same pattern.
Fitment and chemistry
The included B/92 clutch plate is Mercury's universal-pattern plate with a standard 5-inch center hole, and it fits a long list of machines including Clarke, Advance, Nilfisk, NSS, Tornado, Betco, Hoover, Oreck, Pacific, Viper and others. Confirm your machine's hub takes a 5-inch center plate and it will mount without an adapter. On chemistry, bassine is a natural fiber and does best with neutral and mildly alkaline detergents; for aggressive stripper or long soaks in caustics, the stiff polypropylene Mercury 1304 in the same size holds up better.
Specifications
- Part number: Mercury 1302
- Block diameter: 11 inches
- Effective cleaning path: approximately 13 inches with bristle splay
- Bristle length: 1.75 inches
- Fill material: bassine, natural coarse fiber
- Clutch plate: Mercury Type B 92, included, 5-inch center hole
- Machine fit: most 13-inch rotary floor machines
- Related sizes: 1502 for 13-inch block, 1702 for 15-inch block
Frequently asked questions
Why is an 11-inch brush listed for a 13-inch machine?
The block measures 11 inches but the 1.75-inch bristles splay outward under machine weight, so the working path comes out to roughly 13 inches. Buying a brush the same nominal size as the machine deck is the common mistake; the block is always smaller.
Which floor machines does the B/92 clutch plate fit?
Mercury lists the Type B 92 plate as a universal fit with a standard 5-inch center hole, covering Kent, Pullman Holt, Oreck, Advance, Alto, Clarke, Betco, Cassidy, Dart, Eureka, General, Hawk, Hoover, Koblenz, Lawlor, Mastercraft, Mercury, NSS, Nilfisk, Pacific, SSS, Thoromatic, Tornado, United and Viper machines. Check your machine's hub against a 5-inch center hole before ordering.
What is bassine and how does it compare to poly?
Bassine is a natural coarse fiber, stiff and slightly abrasive, which makes it the general-purpose scrubbing choice on concrete, quarry tile and textured surfaces. Stiff polypropylene, such as the Mercury 1304, resists chemicals and water better and holds its stiffness longer when wet, but bassine has more bite on rough floors.
Can I use it for stripping finish?
It will move stripper and agitate a floor, but a brush is not the efficient tool for stripping wax. A black strip pad on a pad driver cuts finish faster and leaves less behind. Keep the bassine brush for scrubbing unfinished, textured or heavily soiled floors.
Does it come with the clutch plate attached?
Yes. The Mercury 1302 ships with the B/92 clutch plate installed, so it mounts to a compatible machine without a separate driver purchase.
Discount Cleaning Products is an authorized dealer for this line, with US-based product support from people who sell this equipment every day. Call or email before you order if you are unsure about fitment, sizing or which grade suits your work, and we will check it against the manufacturer specification rather than guess.
