Promac HDF Series: Heavy Duty Flail Forestry Mulcher
Promac Equipment’s HDF: Heavy Duty Flail Forestry Mulcher is our same forestry-proven, boxed-in drum style mulcher for 13-30+ ton excavators, but specially designed to give contractors the added optional benefits of flail hammers. These benefits range from increased durability for new operators or unpredictable terrain, to reduced general maintenance requirements and related costs. Promac’s no-nonsense western forestry roots ensure this unit to give you more notable power, robustness, serviceability, and endurance over other boxed-in drum mulchers – with this design known to last 20+ years.
About the Product
Product Features
Available in 36”, 48”, 60” inch cutting widths, the HDF’s heavy flail hammer tooling, bent axis piston 80cc or 107cc motor options, and 20” inch drum diameter offers a fast and heavy-duty mulching action, with added forgiveness on your tooling in the instance of operator errors or mishaps due to unpredictable terrain. Reinforced and replaceable wear shoes, and the extra robust boxed-in construction, heavily utilizing 100,000 PSI steel, means you can mulch each tree straight to the ground as fast as the job requires, and better process the mulch on the ground to as fine as the job requires. The easy-to-remove panels to thoughtful service areas means faster maintenance and maximum up time. Some notable application types for this attachment are right-of-way maintenance, industrial site preparation/maintenance, and rural property preparation/maintenance.
- Flail Hammer Drum Type
- Flat-Top Bracket
- Carbide Faced, Heat-Treated Flail Hammers
- Bracket Mounted Pusher Pad (optional)
- Quick-Change or Pin-Type Bracket (optional)
- Fixed or Variable Displacement Motor (optional)
- 20” Front Exposed Drum
- Easily Accessible Service Points
- Replaceable Wear Shoes
- Fully Boxed-In Construction
Product Specs
Model
HDF3680A
HDF3680A-C
HDF48107A
HDF48107A-C
HDF60107A
HDF60107A-C
Dimensions
62"x 49"x 59"
62"x 49"x 59"
74"x 49"x 59"
74"x 49"x 59"
86"x 49"x 59"
86"x 49"x 59"
Excavator Size
13-20 tons
13-20 tons
20-30+ tons
20-30+ tons
22-30+ tons
22-30+ tons
Cut Width
36"
36"
48"
48"
60"
60"
Avg. Flow Range
29-33 GPM
29-33 GPM
40-44 GPM
40-44 GPM
40-44 GPM
40-44 GPM
Min. Weight
2600 lbs (w/ Flat Top Bracket)
3000 lbs (Estimated w/ Full Bracket)
2900 lbs (w/ Flat Top Bracket)
3300 lbs (Estimated w/ Full Bracket)
3200 LBS (w/ Flat Top Bracket)
3600 lbs (Estimated w/ Full Bracket)
Min. Pressure
4000 psi
4000 psi
4000 psi
4000 psi
4000 psi
4000 psi
Std. Motor Size
80 cc
80 cc
107 cc
107 cc
107 cc
107 cc
Std. Motor Type
Bent Axis Piston
Bent Axis Piston
Bent Axis Piston
Bent Axis Piston
Bent Axis Piston
Bent Axis Piston
Sugg. Drum Speed
2000 RPM
2000 RPM
2000 RPM
2000 RPM
2000 RPM
2000 RPM
Promac Equipment
Forged in the heart of western forestry over five decades, Promac Equipment designs and manufactures premium mulchers, masticators, and cutters built to thrive in the toughest vegetation management conditions. Known across the industry for uncompromising quality and performance, Promac Equipment products are engineered to keep operators working—not fixing. No gimmicks. No cheap features. Just rock-solid reliability that stands up to the harshest environments. Proudly based and built in British Columbia, Canada—where serious forestry demands serious equipment.

Our warranty policy lasts 30 days. If 30 days have passed since your purchase, we can’t offer you a full refund or exchange.
Warranty PolicyAt Forge Attachment Company, we strive to provide efficient and reliable shipping for all our heavy equipment attachments. Please read the following shipping policy to understand how your order will be processed and delivered.
Shipping PolicyWe understand that sometimes products may not meet expectations or requirements. To ensure a positive shopping experience, we’ve outlined our Refunds & Returns Policy.
Returns Policy