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

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* -- -- 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
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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Updated as of March 29, 2023 1:34 PM EDT

UPCOMING PUBLIC HOLIDAYS

Date Description

STUMP GRINDERS

Model Number Discount Available Lead time to build
first order		 Lead time to build
next order		 Location Notes Discount Description
WB4410% MTBNew unit in a crate that has sat round for a while
HGW3010% MTBRefurbished HGW30 BL1009517 with full warranty
1P24 MTBDiscount on multiples of two
D005735 Extension bracket kit for 1P24
S1050 S1050 valve kit (shipped w/o stump grinder)
3P24
3P24-S1050 S1050 kit mounted.
3P34
3P34-S10507% 1 in stock in green, color is free and discount on the unit (BL1011875) S1050 kit mounted.
3P40
3P40-S1050 S1050 kit mounted.
S14
S14-S250 MTBStock w/S250 and D001126 mini plate
S1660% + more for media Pre-Production Discount
S18-S450 MTBStock w/D001127 plate
S18-S550 MTBStock w/D001127 plate
S18-S650 MTB
S24-S445
S24-S545
S28-S645
S40
HGS50F
GXM350
GXM350-X508
GXM350-X510
GXM550
GXM550-X510
GXM550-X530
GXM750

PUBLIC HOLIDAYS

Date Description
2023-04-07Good Friday
2023-05-22Victoria Day