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Dosko Stump Grinder 20 HP
Dosko Stump Grinder 20 HP
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Highlights
Ideal For
- Commercial Landscaping Crews: An essential tool for rapidly removing stubborn stumps and destructive surface roots to prep lawns for new sod or planting.
- Independent Arborists: A highly maneuverable machine that allows tree care professionals to easily access and grind stumps in tight, fenced-in residential backyards.
- Property Maintenance Fleets: Quickly erases tripping hazards and massive surface roots that threaten sidewalks, driveways, and underground utility lines.
- Equipment Rental Stores: Engineered with a simplified direct-drive system and rugged construction to survive the harsh abuse of daily customer rentals.
- Golf Course Management: Allows groundskeepers to precisely remove problematic stumps near fairways and greens without bringing in heavy, turf-destroying excavators.
- Municipal Park Services: Highly portable and perfectly scaled for city workers clearing dead trees and maintaining public hiking trails.
'Need to Knows'
- Commercial Engine Power: Driven by an industrial-grade 688cc Honda GX630 engine, delivering the extreme torque required to easily chew through massive hardwood.
- Convenient Electric Start: Bypasses frustrating recoil pulling with a reliable electric start system, allowing your crew to get to work instantly (battery not included due to shipping restrictions).
- Aggressive Cutting Disc: Features a massive 14-inch diameter, 3/8-inch thick cutting wheel spinning at a blistering 2500 RPM to violently obliterate dense wood.
- Premium Greenteeth: Comes standard with an 8-tooth Greenteeth 700 series setup featuring a unique concave design that smoothly shears wood instead of shredding it.
- Triple Blade Economy: The unique Greenteeth can be quickly rotated in 120-degree increments, providing three brand-new cutting edges per tooth before needing a replacement.
- Slip-Free Power Transfer: Utilizes a heavy-duty direct belt drive with a 4-groove power band that completely eliminates the slippage associated with standard centrifugal clutches.
Warranty & Specs
- Heavy-Duty Bearings: The main cutting disc spins flawlessly under extreme pressure thanks to massive 1.375-inch diameter commercial bearings.
- Deep Grinding Capability: Engineered to completely destroy massive stumps up to 20 inches above the ground and chase the root system a full 16 inches below grade.
- Engine Protection: The massive Honda engine features an integrated oil shutdown sensor that instantly kills the motor if lubrication drops to dangerous levels.
- Clean Operation: Built with a unique side-discharge frame that actively directs flying woodchips and dirt away from the machine and the operator.
- Operator Comfort: Features a highly versatile 5-position adjustable handlebar to accommodate operators of any height and drastically reduce back strain.
- Machine Weight: Weighs in at a solid 400 pounds, ensuring the cutting head stays firmly planted against the wood during aggressive grinding.
Product Info
Dosko Stump Grinder 20 HP
Aggressive, Walk-Behind Grinding Power for Massive Land Clearing

When a massive hardwood tree comes down, leaving the stump to slowly rot is entirely unacceptable for professional property managers. The Dosko Stump Grinder 20 HP is engineered to completely erase that massive eyesore in minutes, transforming solid hardwood into a neat pile of valuable mulch.
At the absolute center of this heavy-duty machine is an industrial 688cc Honda GX630 engine. Highly respected by commercial landscapers, this legendary power plant features a highly convenient electric start system and delivers the extreme, unyielding torque necessary to aggressively power through the hardest wood species without stalling.
To maximize cutting efficiency, this grinder is equipped with a massive 14-inch cutting disc spinning at a blistering 2500 RPM. Armed with an 8-tooth Greenteeth 700 series setup, this machine aggressively shears massive stumps 20 inches above grade and chases the sprawling root systems a full 16 inches underground.
Standard commercial grinders rely on weak centrifugal clutches that constantly slip and burn out under heavy loads. This unit bypasses that completely by utilizing a heavy-duty direct belt drive with a 4-groove power band, ensuring flawless, slip-free power transfer from the 20 HP engine straight to the massive cutting disc.
Maneuvering a 400-pound machine while grinding dense wood requires serious leverage. The Dosko Stump Grinder 20 HP features a highly versatile 5-position adjustable handlebar, allowing operators of any height to comfortably sweep the massive cutting head back and forth while significantly reducing back fatigue.
Built to survive chaotic commercial environments, this grinder features a unique side-discharge frame that actively throws heavy debris away from the operator. Combined with massive 1.375-inch bearings and an integrated engine oil shutdown sensor, this machine guarantees your crew dominates the toughest land clearing jobs.
Why Choose The Dosko 20 HP Stump Grinder?
Legendary Honda Reliability
Standard residential engines simply cannot handle the violent, continuous vibration of commercial stump grinding. This machine is powered by the legendary Honda GX630 engine, providing the bulletproof reliability and extreme torque required to chew through massive hardwood stumps all day long.
Effortless Electric Start
Trying to pull-start a massive 688cc engine with a standard recoil cord is incredibly exhausting. This machine features a highly reliable electric start system that gets the massive engine fired up instantly, drastically reducing operator fatigue and increasing jobsite efficiency.
Advanced Shearing Action
Standard grinding teeth aggressively rip at the wood, causing violent machine kickback and operator fatigue. This unit utilizes a premium Greenteeth setup with a unique concave "dish" design that smoothly shears the wood, drastically reducing vibration and making the grinding process incredibly smooth.
Triple Blade Economy
Shutting down a massive land clearing operation just to sharpen dull grinding teeth wastes valuable daylight. Because this machine utilizes a specialized Greenteeth system, your crew can simply unbolt the tooth and rotate it 120 degrees, effectively giving you three brand-new cutting edges per tooth.
Direct Drive Efficiency
Centrifugal clutches are notorious for slipping and burning out when forced to spin heavy steel cutting wheels through dense wood. This unit utilizes a heavy-duty direct belt drive with a 4-groove power band, ensuring flawless, slip-free power transfer and preventing costly jobsite downtime.
Massive Grinding Depth
Shaving a stump flush with the lawn doesn't solve the problem; the roots will eventually heave the driveway or ruin the commercial sod. This grinder is engineered to chase the root system an incredible 16 inches below ground, ensuring the stump is completely and permanently eradicated.
Clean Side-Discharge
Many heavy-duty grinders blast heavy woodchips and dirt straight back into the operator's shins. This machine is built with a highly specialized side-discharge frame that actively throws the heavy debris away from your crew, making the job significantly safer and much cleaner.
Additional Options: Check out other Stump Grinders or other Dosko options
Specifications
Dosko Stump Grinder 20 HP Walk Behind 620-20HE Specs

| Specification | Technical Data |
|---|---|
| Equipment Type | Walk-Behind Stump Grinder |
| Engine Type / Brand | Honda GX630 |
| Engine Displacement | 688cc |
| Starting System | Electric Start (Battery Not Included) |
| Cutting Disc Speed | 2500 RPM |
| Cutting Wheel Dimensions | 14-In. Diameter / 3/8-In. Thick |
| Grinding Capability | 20-In. Above Grade / 16-In. Below Grade |
| Cutting Teeth | (8) Greenteeth 700 Series (3-Way Rotatable) |
| Power Transmission | Direct Belt Drive (4 Groove Power Band) |
| Main Bearings | 1.375-In. Diameter |
| Engine Protection | Low Oil Alert / Shutdown Sensor |
| Handle Design | 5-Position Adjustable |
| Discharge Type | Side-Discharge Frame |
| Tire Specifications | 4.80/4.00-8 In. with Adjustable Brake Band |
| Dry Weight | 400 Lbs. |
| SKU | 620-20HE |
| Manufacturer Part Number | 620-20HE |
| Brand | Dosko |
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