Multi-Functional Robotic Mower

RM21. One robot. Four turf-care jobs.

Name: RM21 Multi-Functional Robotic Mower
Brand: FJ Dynamics
Availability: InStock

Mow, mark, collect, brush. The RM21 swaps between four attachment kits so a single autonomous platform covers most of what your turf crew runs every week. RTK plus 360 degree LiDAR navigation, app-controlled fleet, sold and supported by RobotLAB.

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26.7 acres

72-hr max mowing area, fast charging mode

RTK + 360° LiDAR

Centimeter-level navigation

4 kits

Mow, mark, collect, brush

IPX4

Outdoor-rated chassis

Why facilities choose the RM21

The RM21 is built for turf operators who need more than a single-purpose mower. It combines autonomous mowing, line marking, grass collection, and dew brushing into one chassis, with RTK navigation and fleet management designed for commercial properties under labor pressure.

Built for commercial turf workloads

Up to 5 hours run time, 4 kWh battery, 3-acre coverage per charge, and 72-hour autonomous operation up to 26.7 acres in fast charging mode. Designed for golf courses, sports fields, sod farms, and stadium grounds.

Designed for real-world turf demands

One chassis covers four jobs. Mow with the base unit, mark fields with the LM01 line marker, collect clippings or clean artificial turf with the GC01, pick range balls with the BP01, or brush dew off greens with the DB01. No second robot, no second budget line.

Safer autonomous navigation

RTK plus 360 degree LiDAR fusion holds position even under tree cover and in weak-signal areas. Multi-layer safety combines real-time LiDAR obstacle detection with front and rear physical bumpers for safer operation around staff, players, and equipment.

Lower manual intervention

Multi-zone task assignment, fleet management from the cloud, and one-tap autonomous workflows let one operator manage multiple robots across multiple zones. Teams under labor pressure get more done without adding headcount.

Best fit buyers and environments

The RM21 is strongest where one chassis crossing multiple turf jobs unlocks operational simplicity, headcount efficiency, and consistent results across the calendar.

Top deployment types

Golf courses, driving ranges, soccer and football fields, baseball and softball fields, lacrosse and rugby fields, sod production blocks, stadium turf, indoor and artificial-turf facilities, and multi-field athletic complexes.

When to choose something else

If your property is a tournament-grade golf green that demands cylinder-cut quality, the RCM01 is the better fit. If you operate at sod-farm or large-estate scale and want a heavier-duty mower as the workhorse, look at the Titan. If your only job is stadium-grade line marking at high paint volume, look at the PaintMaster Pro.

Four attachment kits, one platform

Pick the combos that match your operation. Swap on-site, no specialty tools, one operator workflow, one service plan.

Combo 1

LM01 Line Marker

Stripe full-size fields autonomously. Up to 50 percent less paint usage and 90 percent less labor versus a manual paint cart. Mark up to 20 full-size soccer fields per charge.

Soccer, rugby, American football, baseball, lacrosse

Combo 2

GC01 Grass Collector

Mow and collect clippings in one autonomous pass, plus professional light-and-dark striping. Doubles as an artificial turf cleaner for stadiums and indoor practice facilities.

Sports fields, sod farms, stadium turf, artificial turf

Combo 3

BP01 Ball Picker

Autonomous range ball collection with full-basket detection and auto-return. Two baskets, 400 balls each. Cloud-managed scheduling for multi-robot full-course coverage.

Golf driving ranges, golf academies

Combo 4

DB01 Dew Brush

Pre-tee-time dew brushing on greens. Smart lifting and folding so the brush rides at the right pressure for the surface. Up to 9.6 ft of brush span across three sections.

Golf course greens, country clubs, resorts

RM21 vs. other RobotLAB turf-care robots

This comparison helps buyers see where the RM21 fits inside the RobotLAB turf-care lineup. We removed hard pricing until pricing is confirmed, and focused the table on operational fit and product positioning.

	RM21	RCM01	Titan	PaintMaster Pro
Best use case	Multi-job autonomous turf care across golf, sports fields, sod, stadium	Cylinder-cut precision for premium turf and tournament-grade greens	Heavy-duty mowing for large-acre commercial operations	Stadium-grade autonomous line marking
Positioning	One chassis, four attachment kits, RTK + 360 deg LiDAR	11-blade reel cylinder mower for fairway and green quality	Big-acre robotic mower with multi-zone fleet management	Dedicated 25 L paint capacity, optional laser kit, multi-sport templates
Floor environment fit	Sports fields, sod farms, stadium turf, golf rough, driving ranges, greens (with DB01)	Golf fairways, premium sports turf, championship fields, sod farms	Sod farms, large sports complexes, municipal parks, large estates	Full-size soccer, football, rugby, baseball, lacrosse, multi-field complexes
Buying path	Request brochure & pricing from RobotLAB	Request brochure & pricing from RobotLAB	Request brochure & pricing from RobotLAB	Request brochure & pricing from RobotLAB
Why buyers shortlist it	One robot replaces four pieces of equipment, one operator workflow, one service plan	Cylinder cut quality, 7 to 44 mm cutting height, fast battery swap	Bigger acreage per shift, designed for daily commercial duty cycles	Higher paint capacity, sport-template library, optional laser kit for GPS-challenged sites

RM21 specifications

Full RM21 base-unit and attachment-kit specifications. Imperial primary with metric in parentheses. Coverage figures reflect ideal operating conditions; real-world results vary with grass type, soil, cutting height, and terrain.

RM21 base unit
Weight	375 lb (170 kg)
Dimensions (L × W × H)	52.4 × 33.6 × 38.6 in (1,330 × 853 × 980 mm)
IP rating	IPX4
Operating temperature	32 to 113 °F (0 to 45 °C)
Cutting width	25 in (635 mm)
Cutting height	0.8 to 5 in (20 to 127 mm)
Travel speed	0 to 3.7 mph (0 to 6 km/h)
Max climbing ability	20°
Recommended working slope	15°
72-hr max mowing area (fast charging)	26.7 acres (108,000 sqm)
72-hr max mowing area (standard charging)	23.1 acres (93,600 sqm)
Max mowing area per charge	3 acres (12,000 sqm)
Battery capacity	4 kWh
Max working time	5 hours
Charging time	3 hr fast / 5 hr standard
Navigation	RTK GNSS plus 360° LiDAR fusion
Safety	360° LiDAR obstacle detection plus front and rear physical bumpers
Control	Mobile app, multi-zone task assignment, fleet management

Cutting height note: use the lowest setting of 0.8 in (20 mm) only on flat surfaces; for uneven ground, set the height to at least 1.2 in (30 mm). Working area depends on grass type, soil, cutting height, and slopes.

Attachment kit specifications

LM01 Line Marker Kit
Weight	150 lb (68 kg)
Dimensions (L × W × H)	59.6 × 33.6 × 41.4 in (1,515 × 853 × 1,051 mm)
IP rating	IPX4
Max marking speed	1.9 mph (3 km/h)
Paint tank capacity	5.5 gal (25 L)
Line width range	2 to 6.7 in (50 to 170 mm)
Nozzle height	1.2 to 3.1 in (30 to 80 mm)
Operating temperature	41 to 95 °F (5 to 35 °C)
Max marking time per charge	20 hours

GC01 Grass Collector Kit
Weight	220 lb (100 kg)
Dimensions (L × W × H)	49.6 × 37.8 × 29.1 in (1,260 × 960 × 740 mm)
Grass collection height	0.8 to 2.0 in (20 to 50 mm)
Collection width	31.5 in (800 mm)
Max collection volume	33 gal (150 L)
Max travel speed	1.9 mph (3 km/h)
Max climbing ability	8°
IP rating	IPX4
Operating temperature	32 to 113 °F (0 to 45 °C)

BP01 Ball Picker Kit
Weight	154 lb (70 kg)
Dimensions (L × W × H)	58.3 × 44.1 × 23.2 in (1,480 × 1,120 × 590 mm)
Picking width	35.4 in (900 mm)
Basket count	2
Capacity per basket	400 golf balls

DB01 Dew Brush Kit
Weight	61.7 lb (28 kg)
Single-section length	39.4 in (1,000 mm)
Three-section length	115.4 in (2,930 mm)
Brush lift	Supported
Brush folding	Supported

Backed by RobotLAB service plans

Silver, Gold, and Platinum plans cover RM21 the same way they cover the rest of the RobotLAB fleet. 24-hour response, same-day or next-day onsite, 72-hour swap, annual on-demand mapping or settings refresh, plus a Care Pack for consumables. No commercial turf operation should buy a robot without a service plan, and we built ours specifically for the way commercial users actually run their fleets.

See full service plan details

Common questions

What facilities are the best fit for the RM21?

The RM21 is best suited for commercial turf operations that run multiple jobs on the same property: golf courses, sports field complexes, stadium grounds, sod farms, driving ranges, and athletic facilities. The four attachment kits let one chassis cover mowing, line marking, grass collection, range ball pickup, and dew brushing.

Do I need different RM21 robots for each job, or is one enough?

One RM21 base, four attachment kits. Swap on-site between mowing, line marking, grass collection, ball picking, or dew brushing. Most properties run one or two RM21 bases plus the attachment combos that match their work.

When do I choose RM21 with LM01 versus PaintMaster Pro?

RM21 plus LM01 is the right answer when you want one platform across mowing, marking, and collection on the same property. PaintMaster Pro is purpose-built for high-volume stadium and college marking with 25 L paint capacity, an optional laser kit for GPS-challenged areas, and a deeper sport-template library, when your only job is lines and you want a dedicated machine.

Can the RM21 run as part of a fleet?

Yes. Multi-zone task assignment and cloud fleet management let one operator run multiple robots across multiple zones from the mobile app. Larger properties typically run two to four RM21 bases plus shared attachment kits.

How does the RM21 handle weak GPS or tree cover?

RTK plus 360 degree LiDAR fusion keeps the robot positioned even under tree cover and in areas with weak signals. Multi-layer safety pairs real-time LiDAR obstacle detection with front and rear physical bumpers for safer autonomous operation.

How do I get pricing, a brochure, or a demo?

Use the request form on this page to ask RobotLAB for the latest brochure, pricing, deployment guidance, or a demo conversation. Pricing varies based on attachment combos, service plan tier, and deployment requirements.

Get the right RM21 setup for your property.

Tell us your acreage, your verticals, and the jobs you want to autonomate first. We come back with a real configuration, the right attachment combos, and a delivery window. Not a brochure quote.

Request brochure & pricing

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