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.

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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

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 -- -- -- --
3,500* -- 30 min 25 min 20 min 16 min -- --
3,500* -- -- 40 min 25 min 15 min 12 min 10 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
4,000 20 min 15 min -- -- -- -- -- -- --
4,000 20 min 10 min 7 min 5 min -- -- -- -- --
4,000 -- 11 min 7 min 5 min 5 min -- -- -- --
4,000 -- -- 7 min 5 min 5 min 4 min -- -- --
4,000 -- -- -- 5 min 5 min 4 min 3 min -- --
4,000 -- -- -- -- 6 min 4 min 3 min 3 min --
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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Updated as of November 15, 2019 5:58 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
WB44Stock5MTB
GWM53015%718MTBSame as HGW30Yellow Holt frame
HGW60Stock146MTB
1P24Stock3MTB
3P24Stock3
S105033Any 3P with valve kit (this covers all the time)
3P34Stock3
3P40Stock4
3P50154154NEED TO DESIGNNew 150 Hp model
3P60154154NEED TO DESIGNNew 200 hp model
S1429MTB
S18-S450Stock3MTBStock w/D001127 plate
S18-S550Stock3MTBStock w/D001127 plate
S18-S650Stock3Stock w/D001127 plate
S2424
S2829
S401010
GXM350310
GXM550310
GXM7501818

PUBLIC HOLIDAYS

Date Description