Product Description
20" Orbital Walk-Behind Auto Scrubber | AGM or Lithium Battery | Karcher B 50 W Bp O51
The Karcher B 50 W Bp O51 is a compact walk-behind automatic floor scrubber built for fast, efficient wet cleaning of commercial floors and hard surfaces. This product page allows you to choose between the AGM battery configuration and the lithium battery configuration.
This model uses the O51 orbital scrub head with a 20 inch cleaning path and strong mechanical cleaning performance. Orbital cleaning can reduce water usage compared to traditional disc heads and can be used for both scrubbing and stripping tasks when paired with the correct pads.
The B 50 platform also features a durable die-cast aluminum scrub head, parabolic squeegee for strong water recovery, and traction drive to reduce operator fatigue in schools, retail stores, healthcare facilities, municipal buildings, and commercial properties.
High-agitation scrubbing and stripping capability
Select the battery package that fits your facility
Reduces operator fatigue during daily cleaning
Compact platform with productive tank capacity
Theoretical productivity for large commercial floor cleaning programs.
Practical productivity for real-world facility cleaning.
How to Choose Your B 50 W Bp O51 Configuration
Select your preferred battery configuration above. Both versions use the same O51 orbital scrub deck and traction-drive B 50 W platform.
AGM Battery Configuration
- Lower upfront cost
- Maintenance-free sealed battery design
- Strong choice for routine daily scrubbing
- Good fit for schools, retail, offices, and municipal buildings
Lithium Battery Configuration
- Premium battery upgrade
- Faster charging and opportunity charging
- Longer battery lifecycle
- Best for facilities that need more uptime and reduced battery maintenance
Choosing the Right Scrub Head
O51 Orbital Deck
Best for aggressive cleaning, low-water performance, and stripping capability when paired with the correct pads.
R55 Cylindrical Deck
Better for textured floors, grout lines, and facilities where light debris pickup is helpful.
Looking for the cylindrical version? View the Karcher B 50 W Bp R55 Cylindrical Scrubber.
Free Demo Available
Want to see the B 50 W Bp in action before you buy? We can help schedule a free demo when available. Email sales@monsterjanitorial.com with your facility details, flooring type, and approximate square footage to confirm availability and recommendations.
Recommended Applications
Key Features
Orbital Cleaning Performance
- O51 orbital scrub head with 20 inch cleaning path
- Strong mechanical agitation for deep cleaning
- Can support stripping applications with the correct pads
- May reduce water usage compared to traditional disc scrub heads
Operator-Friendly Design
- Traction drive reduces operator fatigue
- Compact size improves maneuverability in busy facilities
- On-board charger included
- Parabolic squeegee helps support excellent water recovery
Durable Commercial Build
- Die-cast aluminum scrub head assembly
- Die-cast aluminum suction bar assembly
- 13.2 gallon solution and recovery tanks
- Built for routine commercial floor maintenance programs
Specifications
B 50 W Bp O51
Walk-Behind Auto Scrubber
O51 Orbital
20.07 in
33.4 in
Traction Drive
13.2 gal / 13.2 gal
Up to 32,937 sq ft/hr
Approx. 19,805 sq ft/hr
79.3 lb
Approx. 65 dB(A)
52 x 22.5 x 42 in
Available Configurations & Karcher SKU Reference
The B 50 W Bp O51 is available in AGM and lithium battery configurations. Select your preferred battery option above.
| Karcher SKU | Configuration |
|---|---|
| 9.808-091.0 | B 50 W Bp O51 - AGM Battery Configuration |
| 1.533-272.0 | B 50 W Bp O51 - Lithium Battery Configuration |
Included with this Configuration
- 4.778-008.0 - Squeegee bar, parabolic, 850 mm / 33 in
- 4.400-011.0 - Squeegee blade set Linatex 850 mm / 33 in
- O51 orbital scrub head
- Selected battery configuration
- On-board charger
- Die-cast aluminum suction bar and scrub head assemblies
Optional / Not Included
- 4.035-345.0 - Auto-Fill
- 2.644-365.0 - Add-on kit emergency stop B 50 W
- 4.400-089.0 - Set side strip oil resistant
- 4.400-090.0 - Squeegee blade set natural rubber 850 mm / 33 in
- 5.035-488.0 - Home Base kit, adapter and cable hook
- 4.070-075.0 - Home-Base universal hook kit
- 4.400-080.0 - Home-Base mop clip
- 6.980-077.0 - Home-Base double hook
- 6.980-078.0 - Home-Base holder handhold grey
- 2.644-313.0 - KEM Machine Connect B 50 W
Orbital Pad and Brush Options for O51
- 6.369-077.0 - Black pad 508 mm, kit of 5
- 6.369-078.0 - Green pad 508 mm
- 6.369-079.0 - Red pad 508 mm, kit of 5
- 6.370-273.0 - Disc brush for O51
- 6.371-030.0 - Pad SPP 51
- 6.371-271.0 - Microfiber pad
Replacement Squeegee Options
- 4.400-011.0 - Squeegee blade set Linatex 850 mm / 33 in
- 4.400-005.0 - Squeegee blade set PU 850 mm / 33 in
- 4.400-090.0 - Squeegee blade set natural rubber 850 mm / 33 in
Recommended Chemicals
- Pioneer Eclipse Lumen L350 Neutral Cleaner
- Pioneer Eclipse Low-Foam Neutral Cleaner
- Karcher Heavy Duty Degreaser 8.698-154.0
Shop Cleaning Chemical Pods | Shop Auto Scrubber Chemicals
Replacement Parts and Manuals
Need parts diagrams, wear items, or service parts? Visit our Karcher manuals hub:
Manuals and Documents
- Operating Manual / Safety Information
- Operating Manual / Safety Information
- Operating Manual / Safety Information
- Product Information Sheet
Frequently Asked Questions
What does orbital mean on a floor scrubber?
An orbital scrubber head moves the cleaning pad in a rapid oscillating motion instead of spinning like a traditional disc scrubber. This motion creates strong mechanical agitation, allowing the machine to clean aggressively while using less water and fewer chemicals.
Why is the Karcher O51 orbital head round instead of rectangular?
Orbital refers to the cleaning motion, not the shape of the scrub head. The Karcher O51 uses a round 20 inch pad that moves in an orbital pattern to deliver strong cleaning performance with improved maneuverability.
Can an orbital scrubber strip floors?
Yes. Orbital scrubbers can often remove floor finish using water or reduced chemical usage when paired with the correct stripping pads, making them a more sustainable option compared to traditional disc machines.
What is the difference between AGM and lithium?
AGM batteries are sealed, maintenance-free, and lower upfront cost. Lithium batteries are a premium upgrade with faster charging, opportunity charging, longer battery life, and reduced maintenance.
Manufacturer Warranty
Limited Warranty - Karcher North America
- Lifetime Parts Coverage: Parts and components covered for the lifetime of the machine to the original purchaser.
- Lifetime Polyethylene Housings: Rotationally molded housings covered for the lifetime of the machine.
- 3 Years Labor: Service labor covered for three years through authorized service providers.
- Travel Coverage: Up to three hours round-trip travel for field repairs during coverage period.
- Batteries: Battery warranty handled by the battery manufacturer.
- Wear Items: 90 days against manufacturing defects.
View Full Karcher Lifetime Warranty PDF
Helpful Resources for Facility Managers
- How to Choose an Automatic Floor Scrubber for Schools and Government Buildings
- Lithium vs AGM vs Wet Batteries in Automatic Floor Scrubbers
- Karcher Automatic Floor Scrubber Maintenance Checklist
Institutional Purchasing Support
- Purchase orders accepted
- Tax-exempt account setup assistance
- Bid and specification support available
- D-U-N-S and UEI available upon request
Why Choose Monster Janitorial?
- Authorized Karcher distributor
- OEM equipment, parts and accessories
- Fast order processing - most in-stock items ship within 24 hours
- 30-Day Returns
Tax-Exempt Purchasing
Tax-exempt? Create an account and email your certificate to sales@monsterjanitorial.com.
Questions before you buy? Email sales@monsterjanitorial.com or call 956-772-4842.
