| Nominal voltage | 24 V |
| Brush working width | 17-20 in, disk |
| Working width, suction | 33.5 in |
| Theoretical productivity | 18,300-23,680 ft2/hr |
| Fresh/dirty water tank volume | 10.6/10.6 gal |
| Max water flow | 0.68 gpm |
| Max rpm | 1,200 rpm |
| Power | 1300 W |
| Power-vac motor | 500 W |
| Power-brush motor | 600 W |
| Power-traction motor | 130 W |
| Operating noise level | 60-69 dBA |
| Weight (with battery) | 307-384 lbs |
| Dimensions (LxWxH) | 49 x 20.5 x 45 in |
Technical specs may include optional equipment that is not included with all units.
New Karcher B 40 W Bp, traction drive, D 51 disc scrub deck, 24V/138 Ah AGM batteries
Our Take (from the SES Sales Team)
“The B 40 W is a good fit for facilities that want a mid-size walk-behind scrubber with more control than most: schools, healthcare, retail, offices and hotels. This one has the D 51 disc deck, which cleans a 20 in path with a single disc brush, and Kärcher rates it at 16,600 sq ft per hour of practical productivity. Traction drive does the pushing, so long hallways are easier on the operator. The big story is the Kärcher Intelligent Key. A facility manager can set travel speed, brush speed, motor output and solution dosage, and the operator just picks a cleaning program, so results stay consistent from shift to shift. The eco!efficiency setting brings the noise down to 60 dBA for daytime cleaning in offices, hospitals and hotels. It runs on 24 V, 138 Ah AGM batteries for up to 3.5 hours with no watering, and the 10.6 gal solution and recovery tanks suit routine maintenance cleaning. If your floors are heavily textured, ask about the cylindrical R 55 version.”
A 20 in traction-drive scrubber with Kärcher Intelligent Key
The Kärcher B 40 W Bp is a battery-powered walk-behind floor scrubber for schools, healthcare, retail, offices, hotels and other commercial floors. The D 51 disc deck scrubs a 20 in path with one 20 in disc brush, a 33.5 in squeegee picks up the water, and Kärcher rates it at 16,600 sq ft per hour practical and 21,530 sq ft per hour theoretical.
This configuration has traction drive and 24 V, 138 Ah AGM batteries, which are sealed and need no watering. Kärcher includes the disc brush, the batteries and the charger.
Condition: New.
What you get
Ready to scrub, with no battery watering
Kärcher Intelligent Key: set it once, clean the same way every shift
Features
Quiet, simple and configurable
- ✓Kärcher Intelligent Key with color-coded access levels for operators and managers
- ✓Six cleaning programs, including eco!efficiency, which lowers motor output and brush speed and cuts noise by up to 4 dB(A)
- ✓Interchangeable modular heads change quickly and without tools
- ✓EASY operation concept with a single program dial
- ✓Sealed AGM batteries and an included charger for low daily upkeep
Choosing a deck
Disc, cylindrical or ORB?
| B 40 W with D 51 disc (this unit) | B 40 with R 55 cylindrical | B 40 W with ORB | |
|---|---|---|---|
| Cleaning path | 20 in | 22 in | 20 in |
| Brushes | 1 disc, 20 in | 2 cylindrical | 1 orbital, 20 in |
| Productivity, practical / theoretical | 16,600 / 21,530 sq ft per hour | 18,300 / 23,680 sq ft per hour | 23,670 sq ft per hour |
| Weight with batteries | 372 lb | 362 lb | 384 lb |
Disc decks suit most smooth commercial floors. Cylindrical decks sweep light debris as they scrub and suit textured or grouted floors.
Specifications
Kärcher B 40 W Bp D 51 at a glance
| Models | B 40 W Bp, traction drive, D 51 disc deck, 24 V / 138 Ah AGM |
|---|---|
| Cleaning path | 20 in (510 mm), disc |
| Brush | 1 x 20 in disc, 180 rpm |
| Brush contact pressure | 135 lb |
| Squeegee width | 33.5 in |
| Solution / recovery tanks | 10.6 gal / 10.6 gal (40 L / 40 L) |
| Productivity | 16,600 sq ft per hour practical; 21,530 sq ft per hour theoretical |
| Battery voltage | 24 V |
| Batteries / runtime | 138 Ah AGM: up to 3.5 hours |
| Charger | Included, 120 V, 60 Hz; charging time 7 hours |
| Drive | Traction drive |
| Sound level | 60 dBA eco!efficiency; 69 dBA standard |
| Length x width x height | 49 x 20.5 x 45 in (1,245 x 521 x 1,143 mm) |
| Weight, with batteries | 372 lb (169 kg) |
| Model Numbers | Kärcher 9.841-375.0 (B 40 W Bp, traction drive, D 51 disc scrub deck, 24 V / 138 Ah AGM batteries) |
Technical specs may include optional equipment that is not included with all units.
Questions
Kärcher B 40 W: common questions
How long does the B 40 W run on a charge?
Kärcher rates this configuration at up to 3.5 hours on its 24 V, 138 Ah AGM batteries, with a charging time of 7 hours. Actual runtime depends on the floor, the program and how the machine is driven.
Do the AGM batteries need watering?
No. AGM batteries are sealed and maintenance free, so there are no cell caps to open or water to add.
What does the Kärcher Intelligent Key do?
Color-coded keys set who can change what. A manager presets speed, brush, motor and solution settings for each task, and the operator selects a program and cleans, so results stay consistent.
How quiet is it?
Kärcher rates it at 60 dBA in the eco!efficiency program and 69 dBA in standard mode, so it can clean during the day in offices, hospitals and hotels.
Should I choose a disc or a cylindrical deck?
Disc decks like this D 51 suit most smooth commercial floors. Cylindrical decks pick up light debris as they scrub and handle textured and grouted floors better. Kärcher builds the B 40 with both, and the modular heads change without tools.
Not sure the B 40 W fits your floors?
Tell our team about the floor, the building and the shift, and we will help you decide if this is the right machine.
