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.

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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

STUMP CUTTING TIMES BASED ON 24" STUMP

Motor Case Drain PSI 12 GPM 15 GPM 20 GPM 25 GPM 30 GPM 35 GPM 40 GPM CC Motor
Type		 RPM at
MAX GPM
S250 Motor
Available for : S14		 Not Required 2,500 50 min 40 min -- -- -- -- -- 50 Roller Vane 910
3,000 40 min 35 min -- -- -- -- --
S450 Motor
Available for : S14,S18		 Not Required 2,500 60 min 40 min 35 min -- -- -- -- 125 Roller Vane 520
3,000 50 min 30 min 30 min -- -- -- --
S550 Motor
Available for : S18		 Recommended 3,000 -- 30 min 25 min 20 min 16 min -- -- 130 Roller Vane 700
3,500* -- 30 min 25 min 20 min 16 min -- --
S650 Motor
Available for : S18		 Recommended 3,000 -- -- 40 min 25 min 15 min 12 min 10 min 245 Roller Vane 540
3,500* -- -- 30 min 20 min 10 min 8 min 6 min

 * Motor will run at this PSI but excess pressure is dumping over relief.

EXCAVATOR STUMP CUTTING TIMES BASED ON 24" STUMP

Motor Case Drain PSI 12 GPM 15 GPM 20 GPM 25 GPM 30 GPM 35 GPM 40 GPM 50 GPM 60 GPM CC Motor
Type		 RPM at
MAX GPM
X508 Motor
Available for :
GXM350,GXM550		 Critical 3,000 25 min 20 min -- -- -- -- -- -- -- 25 Piston 2300
4,000 20 min 15 min -- -- -- -- -- -- --
X510 Motor
Available for :
GXM350,GXM550 		Critical 3,000 25 min 15 min 8 min 7 min -- -- -- -- -- 34 Piston 4290
4,000 20 min 10 min 7 min 5 min -- -- -- -- --
X530 Motor
Available for :
GXM350,GXM550		 Critical 3,000 -- 16 min 8 min 7 min 7 min -- -- -- -- 47 Piston 2100
4,000 -- 11 min 7 min 5 min 5 min -- -- -- --
X540 Motor
Available for :
GXM550,GXM750		 Critical 3,000 -- -- 8 min 7 min 6 min 5 min -- -- -- 65 Piston 2100
4,000 -- -- 7 min 5 min 5 min 4 min -- -- --
X550 Motor
Available for :
GXM550,GXM750		 Critical 3,000 -- -- -- 7 min 6 min 5 min 4 min -- -- 64 Piston 2140
4,000 -- -- -- 5 min 5 min 4 min 3 min -- --
X570 Motor
Available for :
GXM750		 Critical 3,000 -- -- -- -- 7 min 6 min 4 min 3 min -- 84 Piston 2000
4,000 -- -- -- -- 6 min 4 min 3 min 3 min --
X590 Motor
Available for :
GXM750		 Critical 3,000 -- -- -- -- -- -- 5 min 3 min 3 min 108 Piston 1900
4,000 -- -- -- -- -- -- 3 min 3 min 2 min

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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UPCOMING PUBLIC HOLIDAYS

Date Description

Lead time for STUMP GRINDERS

Model Number Discount Available Lead time to build
first order		 Lead time to build
next order		 Location Notes Discount Description

PUBLIC HOLIDAYS

Date Description
  • Show Ready

  • Financing