60"/ 72"

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Promac HSM Series Heavy Duty Skid Steer Mulcher

The Promac HSM Series Heavy Duty Skid Steer Mulcher is our contractor-rated machine built for the operator who values a tough, productive attachment that can work in various ground conditions. Built in our manufacturing facility in Canada, this drum mulcher is made with the highest quality materials and replaceable parts for longevity, ease of maintenance and peace of mind.

HSM Series Heavy Duty Skid Steer Mulcher

Suitable for high flow skid steers from 95-120 hp and hydraulic flow of 35-45 GPM @ 5000 psi, it makes quick work of whatever brush and trees that end up in the way of the 60” and 72″ wide, 17” diameter drum that is equipped with your choice of three styles cutter teeth to suit the working conditions. The drum is powered by a hydraulic variable torque bent axis piston motor with the Promac Automatic Torque Controller (ATC) for class leading productivity. The mulcher incorporates high strength steel and wear resistant parts that are easily replaceable, ensuring your operation runs smoothly for years.

Other Models: HSL

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Product specifications for Promac HSM Series Heavy Duty Skid Steer Mulcher

  HSM-60 HSM-72
cut width 60″ 72″
approx. weight 2500 lb 2600 lb
motor size (cc) 107 cc standard 107 cc standard
motor type bent axis piston with variable displacement bent axis piston with variable displacement
flow pressure (PSI) up to 5000 psi up to 5000 psi
tooling type rotatable knives, beaver teeth or double carbides rotatable knives, beaver teeth or double carbides
tooling number 34 42
flow min (GPM) 35 GPM 35 GPM

Standard features at a glance

The CPR makes sure you don’t bite off more than you can chew, and controls the discharge particle size. The drum features easily replaceable hardened steel wire cutters that prevent wire from winding around the drive shaft between the end of the drum and frame, damaging the bearing seals. All of the CPR holders and plates on the drum are manufactured from high strength steel for superior impact resistance and longevity. Keeps production rolling while creating a consistent mulch in a single pass.
The Teeth

The drum accepts multiple tooling options to suit any budget, performance and ground conditions. Including: Promac’s proprietary reversible knives or “chipper teeth”, double carbides and the standard beaver teeth.

The Frame

Incorporates high-strength steel with full-strength welds for durability. Machined bearing plates within the boxed-in ends increase rigidity and durability, resulting in longer bearing life and lower weight.

The Motor

The combination of the variable torque bent axis motor with the Promac Automatic Torque Controller (ATC) is a new Promac innovation that continuously matches motor displacement with the available hydraulic power for sustained drum speeds and increased productivity.

Promac knows these machines are operating in extreme conditions where normal mild steel will not hold up well in the long term. Abrasion resistant steel, AR400, is incorporated in high wear areas and in components that are replaceable ensuring longevity and easy maintenance. The replaceable parts include: The wear liner, the bolt-in skid shoes and the bolt-in rear anvil.

Versatile Tooling Options

The HSM60 can be equipped with tooling tailored to suit the job conditions and desired end product. The machine comes with our standard chipper teeth that can be easily sharpened, reversed, and replaced. For best results in extreme conditions our double carbides are recommended. Beaver teeth are another great option for most working conditions.

Beaver Teeth

Works for most conditions.

With the addition of a specialized adapter, the HSM60 drum can be transformed to accept very common and widely available 2 5/16″ beaver teeth.

Double Carbides

Best for rocky conditions.

Promac’s Double Carbide Teeth are extremely tough, lasting up to 500 hours. Because the attachment is more likely to make contact with rocks and other hard materials on the ends of the drum, we recommend purchasing Double Carbide Teeth for the outer 4 rows on each end of the drum (16 teeth), and leaving the middle section with the more efficient Chipper Teeth.

Chipper Teeth

Best for sand or soil conditions.

These can be sharpened, reversed, and replaced easily. They are extremely efficient at mulching wood and last between 40-100 hours per side depending on the conditions. They deteriorate quickly in rocky conditions.

The perfect match

Not sure if the Promac HSM will fit your machine? Give us a call or shoot us an email and one of our reps will gladly help you.


  • Suitable for a high-flow skid steer.
  • Suitable for high flow compact track loaders ranging from 95–120 hp with 35–45 gpm at up to 5000 psi.

Built with safety in mind

Discharge control is important when working near the public or buildings. The trajectory of the front discharge is within 5’ feet of the machine when operating level vs. 20-50’ on other open face mulcher machines.

A hydraulic drum brake is an option for those operators that are safety focused. The brake can bring the drum to a rapid stop to protect the operator and other workers.