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Crush Different

Maximize profits. Minimizing downtime.



High-Performance Mobile Impactor

Best in class throughput capacity without sacrificing mobility. More options for a smooth & improved production & lower operating costs.


Ease of Use

Easy to Use

Refined machine controls make light work out of daily maintenance. Troubleshoot issues faster and with confidence. And put more material on the ground.


Safe to use

Safety First Design

Safety is the most important part of the RM 120X mobile impact crusher so that you can trust your guys around the machine.

Our biggest mobile impactor designed for those who must keep crushing

The RM 120X impactor delivres a high reduction ratio while being easy to maintain. The 4-bar rotor is driven directly through a 400 HP John Deere diesel engine and can be used in primary and secondary crushing applications. The crusher box features a 3-stage single-apron impact wall for fast and easy adjustment of your closed side setting.

5 Year Warranty

You deserve not only great mobile impactor but also the industry's best support.

The RM 120X mobile impactor comes standard with a 5 year / 5,000 hours limited warranty on all structural main components. Contact your dealer for details.

Feeder options to optimize material flow

Assymetric hopper

Single piece feed hopper. The assymetric design reduces bridging and keeps you crushing. Adjustable feed-speed.

Pre-screen grizzly

Standard option to bypass fines or discharge fines through an optional side discharge conveyor.

Assymetric hopper

Single piece feed hopper. The assymetric design reduces bridging and keeps you crushing. Adjustable feed-speed.

Patented RM Active Grid

The RM Active Grid is an aggressive self-cleaning pre-screen to bypass fines to the main conveyor or to discharge an non-spec material on the side through an optional side-discharge conveyor.

25% More Hopper Capacity

Hopper wing plates increase hopper capacity to facilitate feeding with large buckets.

RM Active Pre-Screen

The RM Active Pre-Screen is an independently driven aggressive pre-screen to bypass fines to the main conveyor or to discharge a spec material on the side through an optional side-discharge conveyor.

Maximize production. Minmize wear.

The RM Release System helps to remove blockages and keeps your crushing

By the press of a button on your radio remote control the release system is activated. The apron is pushed back so that the material can clear the inlet and you keep crushing without leaving your cab.


Built With Operators, For Operators

The RM 120X advanced safety and convenience features are designed to assist you with the most burdensome parts of crushing.

Radio remote control

Total Crusher Control

All functions are on your radio remote control.

Operator Assistance

Instant visual response on crushing performance, automated feed control and emergency machine shutoffs.

Ease of Use

Easy Troubleshooting

Fault codes with easy to understand on-board resolutions.

mobile impactor controls

Performance IndicatorX

Overfeeding or underfeeding your crusher slows you down. The Performance Indicator visualizes the utilization of the machine and helps operators find the sweet spot of the machine so that they can maximize production and improve their feeding skills.

RM 120X Crushing Limestone

Track & CrushX

If you don't have a conveyor and wheel loader on-site you are in a pinch. RUBBLE MASTER mobile impactors can be moved while crushing so that you can windrow your material and keep crushing.

Status LightingX

Status lights show the condition of the machine.

  • Green - in operation / ready to crush
  • Yellow - not ready to be fed or the machine is being moved
  • Red - not ready because there is an issue
On-board screening plant

Load dependent feed speedX

The RM 120X mobile impactor regulated the feed speed according to the crusher load to maximize production and reduce the risk of stalling your crusher.


Access machine telemetry and track tonnages conveniently on your cell phone or computer.

RM XSMART telemetry and fleet management helps you to optimize your processes and make more money. It connects the dots between service, operators, and your dealer to save time and keep your crushing. Belt-scales are optional.

Ground based service

Safety is important to us. This is why we keep your feet on the ground.

Climbing ladders with power tools and heavy wear parts is a safety hazard. All RUBBLE MASTER mobile impactors are fully ground serviceable which makes light & safe work out of your dailies. Plus, you can trust your guys around the machine.

Closed-circuit impact crusher

5' x 12' Single Deck Screen

The RM 120X Mobile Impactor comes with a large 2 section 5' x 12' screen attachment for a closed circuit production. Standard is also a spreader plate to distribute material evenly across the screen.

Changes as fast as your job requirements.

Hydraulic folding and swiviling return conveyor reduces your setup time and labor costs.

Closed-circuit setup

One operator can set up the mobile impactor conveniently without the need of any hand tools so that your time from trailer to crushing is as low as 15 minutes.

2-way split

Produce a finished product and an oversize product by swivelling the return conveyor 90°. This maximizes production and minimizes wear.

Service position

The screen deck can be lowered hydraulically to be detched or for maintenance. The generous ground-based access allows for fast screen media changes to minimize downtime.


Move Anywhere, Anytime

Experience the freedom of folding up your machine and going anywhere you want. The RM 120X, like all RUBBLE MASTER mobile impactors, was designed with mobility in mind making it easy to move. 

Easy to move

Easy to Mobilize

Can be moved easily from site to site.

Single float

Single move

Crusher and screen attachment can  be moved on one trailer.

15 minute setup time

15 Minutes

from trailer to crushing.

Make more money per produced ton with diesel-electric mobile impactors

RUBBLE MASTER has been utilizing diesel-electric drives for its mobile crushers since our beginning in 1991. This well-proven system offers many benefits over conventional diesel-hydraulic drives - most notably its significant lower fuel consumption and surprisingly low noise emissions.

30% Less

Less Fuel Burn

More efficient drive than conventional diesel-hydraulic crushers.

Extreme temperatures

Works Well in Extreme Temperatures.

No overheating in summer, no heating-up in winter.

Less than 30 gal

Small hydraulic system to operate auxiliary cylinders and tracks.

Video Gallery

RM 120X Crushing Concrete Producing a 1½"- spec material in a single pass
RM 120X Animation Check out how the RM 120X works on the inside.
RM 120X Crushing Mixed C&D Waste Producing a ¾- base material
RM 120X Walk-Around Video Join us on a tour around a fully-loaded RM 120X Mobile Impact Crusher. Take a close-up look at all the new features.

RM 120X Specs

Capacity 350 tph 385 TPH
Inlet opening 1,160 x 820 mm 46" x 32"
Ideal feed size 660 mm 26 "
Crusher unit 4-bar rotor 4-bar rotor
Feed unit 4 m³ 5.2 yd³
Feed unit (extended) 5 m³ 6.5 yd³
Prescreen Grizzly (standard) 1,560 x 910 mm 5.3 x 3 ft
Active Prescreen (optional) 2,000 x 1,050 mm 6.5 x 3.5 ft
Screen-box 1,480 x 3,708 mm 5 x 12 ft
Engine 298 kW 400 HP
Drive diesel-electric diesel-electric
Transport dimension 16,180 x 2,990 x 3,600 mm 52‘10” x 9‘11” x 10‘6“
Weight 44,000 kg 95,000 lbs
Dust suppression system Dust suppression system
Engine compartment light Engine compartment light
Hammer changing device Hammer changing device
Hydraulic folding Hydraulic folding conveyors
Magnetic separator Magnet
Radio remote control Radio remote control
RM Release System RM Release System
Continuous track & crush Continuous Track & Crush
5 Year Warranty 5 Year Limited Warranty
Closed-circuit impact crusher Closed-circuit crusher Apple and Android App RM XSMART Telementry
Compare Models Mobile Impactors
Inlet opening
Transport dimension
RM 120X
Impact Crusher
350 tph 385 TPH
1,160 x 820 mm 46" x 32"
16,180 x 2,990 x 3,600 mm 52‘10” x 9‘11” x 10‘6“
44,000 kg 95,000 lbs
learn more
RM 100GO! Compact Crusher RM 100GO!
Impact Crusher
250 tph 275 TPH
950 x 700 mm 37" x 28"
14,700 x 2,860 x 3,155 mm 48'3" x 9'5" x 10'5"
33,600 kg 74,500 lbs
learn more
RM 90GO! Compact Crusher RM 90GO!
Impact Crusher
200 tph 220 TPH
860 x 650 mm 34" x 25"
13,470 x 2,550 x 3,050 mm 44'2" x 8'5" x 10'
28,400 kg 62,500 lbs
learn more
RM 70GO! Compact Crusher RM 70GO! 2.0
Impact Crusher
150 tph 165 TPH
760 x 600 mm 30" x 23"
13,300 x 2,360 x 3,100 43'8" x 7'9" x 10'2"
24,200 kg 53,400 lbs
learn more

What our customers are saying

"Much more user friendly. The usability, the access to everything. Everything is readily available and there is no safety that you are risking with a RUBBLE MASTER. They designed this thing to be as userfriendly as it can be. My guys thanked me time and time again that we have bought this one because it is so much easier on them."

Bryce Swaim, BTS Equipment

Talk to an Expert

Since 1991, RUBBLE MASTER has brought numerous innovations to the market. We’re crushing & screening experts and work closely with contractors and aggregate producers world-wide.

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