Skid Steer Stump Grinders

Stump Blaster skid steer stump grinders are available in 4 models with a total of 7 hydraulic motor options to make the most of your skid steer performance, with hydraulic flows ranging from 10–40 GPM. Use the Grind Time chart to find the right motor and stump grinder for you. All skid steer Stump Grinder units are shipped with standard skid steer quick attach, and the low flow motor options come with flat-face quick couplers as well, you can order high flow hydraulic quick couplers and we have a size chart on our skidsteer flow and pressure page.

The S14 and S18 are simple rugged grinders that bring cost effective stump grinding performance to your mini-skid steer and skid steer. With the addition of swing cylinders, the S24 and S28 bring even smoother stump grinding action to your skid steer and are ideal for Tree Stump Grinding Services.

We give 6 free teeth with all new purchases and offer more free stump grinder teeth in exchange for action shots useable for marketing.

  • Factory Discounts
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Model No. S14 S16 S18 S24 S28 S40
Recommended HP Size Mini Skidsteer Mini Skidsteer 25-80 30-80 50-120 50-120
Maximum Carrier Size Check GPM & PSI Check GPM & PSI Check GPM & PSI Check GPM & PSI Check GPM & PSI Check GPM & PSI
Motor Type Gerotor Bent Axis Piston Gerotor Gerotor Gerotor Bent Axis Piston
Unit Weight (Shipping) Lbs. 394 400 642 995 995 1,200
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.

SKIDSTEER 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 CC Motor
Type		 RPM at
MAX GPM
S508 Motor
Available for : S16		 Critcal 2500 30 min 30 min 20 min -- -- -- -- -- 25 Piston 2700
3,000 40 min 25 min 15 min -- -- -- -- --
S445 Motor
Available for : S24		 Recommended 2500 -- 60 min 40 min 35 min -- -- -- -- 125 Roller Vane 520
3,000 -- 50 min 30 min 30 min -- -- -- --
3,500* -- 50 min 30 min 30 min -- -- -- --
S545 Motor
Available for : S24		 Recommended 2500 -- 80 min 40 min 35 min 25 min 20 min -- -- 130 Roller Vane 700
3,000 -- 70 min 30 min 30 min 20 min 16 min -- --
3,500* -- 60 min 30 min 30 min 20 min 16 min -- --
S645 Motor
Available for : S28		 Recommended 3,000 -- 40 min 40 min 25 min 15 min 12 min 10 min 130 Roller Vane 540
3,500 -- -- 30 min 20 min 12 min 10 min 8 min
S740 Motor
Available for : S40		 Critcal 2500 -- -- 30 min 15 min 12 min 10 min -- -- 56 Piston 2100
3,000 -- -- 25 min 12 min 10 min 8 min -- --
3,500 -- -- 23 min 10 min 8 min 6 min -- --
S770 Motor
Available for : S40		 Critcal 2500 -- -- -- 30 min 12 min 10 min 8 min 7 min 84 Piston 2000
3,000 -- -- -- 25 min 10 min 8 min 7 min 6 min
3,500 -- -- -- 23 min 8 min 6 min 5 min 4 min

 * Motor will run at this PSI, but excess pressure is dumping over relief.
    5 GPM is used for swing cylinder.

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

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