GXM 350
GXM 550
GXM 750
 
 
S14
S18
 
 
 

Excavator Stump Grinders

The GXM line of excavator stump grinders are offered with multiple motors to exactly match your carrier. Gear motors, roller-vane motors and industry leading bent axis piston hydraulic motors are powered from the hydraulic remotes of your excavator. Flow and pressure are combined into stump grinding power, you can make use of hydraulic flows as low as 8 GPM all the way to 70 GPM. GXM Stump Blasters all come with the dual purpose Blast Shield, it not only controls the debris, but it also helps clean up after by doubling as a back-fill blade. To fit every excavator and budget the simple and rugged S14 and S18 model Stump Blasters are also available with optional excavator mounting.

  • Factory Discounts
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GXM 350
GXM 550
GXM 750
 
 
S14
S18
 
 
 
Model No. S14 S18 GXM350 GXM550 GXM750
Recommended Carrier Size 1-2 ton 1.5-4 ton 1.5-4.5 ton 3.5-8 ton 7-18 ton
Motor Type Gerotor Gerotor High efficiency bent axis piston High efficiency bent axis piston High efficiency bent axis piston
Hydraulic GPM Check Motor Options Check Motor Options Check Motor Options Check Motor Options Check Motor Options
Unit Weight (Shipping) Lbs. 394 642 650 822 1300
36in Root Base
S14
S250 Motor 24" Stump Grind Time
  PSI Case Drain 8 GPM 10 GPM 12 GPM 14 GPM 15 GPM

Gerotor

Hoses and Couplers
Included

50cc Displacement

2,500 No 45 min 40 min 35 min 30 min N/A
3,000* No 45 min 40 min 35 min 30 min N/A
Rotor RPM 520 620 825 900 N/A
   * Motor will run at this PSI but excess pressure is dumping over relief
S14
S18
S450 Motor 24" Stump Grind Time
  PSI Case Drain 10 GPM 12 GPM 15 GPM 20 GPM 25 GPM

Gerotor

Hoses and Couplers
Included

125cc Displacement

2,500 No N/A 50 min 45 min 35 min N/A
3,000 No N/A 45 min 40 min 30 min N/A
3,500* No N/A 45 min 40 min 30 min N/A
Rotor RPM N/A 375 475 520 N/A
   * Motor will run at this PSI but excess pressure is dumping over relief
S18
S550 Motor 24" Stump Grind Time
  PSI Case Drain 12 GPM 15 GPM 20 GPM 25 GPM 30 GPM

Gerotor

Hoses and Couplers
Included

130cc Displacement

2,500 Yes N/A 43 min 30 min 20 min N/A
3,000 Yes N/A 38 min 20 min 15 min N/A
3,300* Yes N/A 38 min 20 min 15 min N/A
Rotor RPM N/A 450 540 700 N/A
   * Motor will run at this PSI but excess pressure is dumping over relief
S18
S650 Motor 24" Stump Grind Time
  PSI Case Drain 20 GPM 25 GPM 30 GPM 35 GPM 40 GPM

Gerotor

Hoses and Couplers
NOT included

3/8" FM JIC on case
P+T 3/4" FM JIC

245cc Displacement

2,500 No N/A 25 min 20 min 15 min 12 min
3,000 Good to have N/A 20 min 15 min 12 min 10 min
3,300* Yes N/A 20 min 15 min 12 min 10 min
Rotor RPM N/A 330 420 480 540
   * Motor will run at this PSI but excess pressure is dumping over relief
GXM350
GXM550
X508 Motor 24" Stump Grind Time
  PSI Case Drain 8 GPM 10 GPM 12 GPM 15 GPM 20 GPM

Hoses and Couplers
NOT Included

25cc Bent Axis Piston

2,500 Critical 28 min 25 min 23 min 15.5 min N/A
3,000 25 min 22 min 20 min 13.5 min N/A
3,300 22 min 17 min 16 min 12.5 min N/A
4,000 17 min 14 min 11 min 10.5 min N/A
Rotor RPM
1200 1520 1818 2300
N/A
GXM350
GXM550
X510 Motor 24" Stump Grind Time
  PSI Case Drain 12 GPM 15 GPM 20 GPM 25 GPM 30 GPM

Hoses and Couplers
NOT Included

34cc Bent Axis Piston

2,500 Critical 23.25 min 14 min 10.25 min 8.5 min N/A
3,000 20.25 min 12 min 8.25 min 7.5 min N/A
3,300 16.25 min 11 min 8 min 6.75 min N/A
4,000 11.25 min 9 min 7.25 min 5.5 min N/A
Rotor RPM
1200 1500 2000 2490
N/A
GXM350
GXM550
X530 Motor 24" Stump Grind Time
  PSI Case Drain 15 GPM 20 GPM 25 GPM 30 GPM 35 GPM

Hoses and Couplers
NOT Included

47cc Bent Axis Piston

2,500 Critical 16 min 10 min 8.25 min 8 min N/A
3,000 14 min 8 min 7.25 min 7 min N/A
3,300 13 min 7.75 min 6.5 min 6.75 min N/A
4,000 11 min 7 min 5.25 min 6 min N/A
Rotor RPM
1100 1450 1800 2100
N/A
GXM550
GXM750
X540 Motor 24" Stump Grind Time
  PSI Case Drain 20 GPM 25 GPM 30 GPM 35 GPM 40 GPM

Hoses and Couplers
NOT Included

56cc Bent Axis Piston

2,500 Critical 10.5 min 8 min 7.75 min 6.75 min N/A
3,000 8.5 min 7 min 6.75 min 5.75 min N/A
3,300 8.25 min 6.25 min 6.5 min 5.5 min N/A
4,000 7.5 min 5 min 5.75 min 4.25 min N/A
Rotor RPM
1220 1500 1800 2100
N/A
GXM550
GXM750
X550 Motor 24" Stump Grind Time
  PSI Case Drain 25 GPM 30 GPM 35 GPM 40 GPM 45 GPM

Hoses and Couplers
NOT Included

64cc Bent Axis Piston

2,500 Critical 8.5 min 7.5 min 6.5 min 5.25 min N/A
3,000 7.5 min 6.5 min 5.5 min 4.25 min N/A
3,300 6.75 min 6.25 min 5.25 min 4 min N/A
4,000 5.5 min 5.5 min 4 min 3.5 min N/A
Rotor RPM
1340 1600 1875 2140
N/A
GXM750
X570 Motor 24" Stump Grind Time
  PSI Case Drain 30 GPM 35 GPM 40 GPM 50 GPM 55 GPM

Hoses and Couplers
NOT Included

84cc Bent Axis Piston

2,500 Critical 8 min 7 min 5 min 4.5 min N/A
3,000 7 min 6 min 4 min 3.75 min N/A
3,300 7.25 min 5 min 3.75 min 3.6 min N/A
4,000 6 min 4 min 3.25 min 3.2 min N/A
Rotor RPM
1200 1400 1600 2000
N/A
GXM750
X590 Motor 24" Stump Grind Time
  PSI Case Drain 40 GPM 50 GPM 60 GPM 70 GPM 75 GPM

Hoses and Couplers
NOT Included

108cc Bent Axis Piston

2,500 Critical 6 min 4 min 3.4 min 2.8 min N/A
3,000 5 min 3.5 min 3 min 2.5 min N/A
3,300 4 min 3.4 min 2.8 min 2.4 min N/A
4,000 3.5 min 3 min 2 min 2 min N/A
Rotor RPM
1260 1575 1900 2200
N/A

HOW TO CHOOSE THE RIGHT MOTOR

The most important part of choosing the right BrushFire is matching the correct motor option to your equipment. It can make a huge difference. In this video, we explain how to use our charts to determine which motor is right for you!

Understanding Motor Understanding Motor
Hydraulic Flow & Pressure Hydraulic Flow & Pressure
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Updated as of January 18, 2019 3:49 PM EST

UPCOMING PUBLIC HOLIDAYS

Date Description

STUMP GRINDERS

Model Number Discount Available Number of Business Days
to build first order
Number of Business Days
to build next order
Location Notes Discount Description
WB4415% - FREE FREIGHT TO DEALERStock7MTB/QC/WADiscounted unit are in QC and Washington StateDemo Units
1P24Stock4MTBCrated and display unit in stock
3P24Stock4MTB
S105044Any 3P with valve kit (this covers all the time)
3P345%Stock4MBDiscounted unit in MBOld Roadshow Stock
3P4055
3P504545NEED TO DESIGNNew 150 Hp model
3P604545NEED TO DESIGNNew 200 hp model
S14815MTB
S18-S450Stock4MTB
S18-S550Stock4MTB
S18-S65044
S24810
S281015
GXM3501116
GXM5501616
GXM7501515

PUBLIC HOLIDAYS

Date Description
2019-02-18Family Day Ontario Canada Holiday