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The Promac R Series Rotary Disk Forestry Cutter is engineered for demanding forestry applications, vegetation management, and wildfire prevention. Available in 36-inch and 52-inch cutting widths, this heavy-duty excavator attachment combines high-strength 100,000 PSI steel construction, fast cutting performance, and long-term durability for mission-critical operations. Its direct-drive system with a shock-resistant coupling helps protect the motor under challenging working conditions. The forestry-proven bearing system, protective motor housing, and reinforced nose cone support dependable operation in rugged environments. Featuring interchangeable XM or GP cutting disks, the R Series offers versatile tooling options to suit different forestry requirements. An integrated pusher/pivot point, bolt-on inlet chute, and accessible service points improve usability and maintenance efficiency. Designed for excavators weighing 15–20 tons or more, depending on configuration, this professional forestry cutter delivers reliable performance, serviceability, and a design proven for 30+ years of service life.
| Specification | 36-Inch Model | 52-Inch Model |
|---|---|---|
| Brand | Promac | Promac |
| Product Name | R Series Rotary Disk Forestry Cutter | R Series Rotary Disk Forestry Cutter |
| Attachment Type | Rotary Disk Forestry Cutter | Rotary Disk Forestry Cutter |
| Cutting Width | 36 inches | 52 inches |
| Overall Unit Width | 69 inches | 84 inches |
| Minimum Carrier Weight | 15 tons | 20 tons |
| Minimum Carrier Power | 80 HP | 135 HP |
| Hydraulic Flow Range | 26–37 GPM | 43–52 GPM |
| Maximum Hydraulic Pressure | 5,000 PSI | 5,000 PSI |
| Standard Motor Type | Bent Axis Piston, Variable | Bent Axis Piston, Fixed Displacement |
| Maximum Disk Speed | 1,800 RPM | 1,800 RPM |
| Attachment Weight | 2,400 lbs | 3,100 lbs |
| Drive System | Direct Drive with Shock Coupler | Direct Drive with Shock Coupler |
| Disk Options | XM or GP Disk | XM or GP Disk |
| Mounting Options | Custom Pin, Wedge, or Other Mount | Custom Pin, Wedge, or Other Mount |
| Construction Material | 100,000 PSI Steel | 100,000 PSI Steel |
| Bearing System | Forestry-Proven Bearing System | Forestry-Proven Bearing System |
| Inlet Chute | Bolt-On | Bolt-On |
| Motor Protection | Protective Motor Housing | Protective Motor Housing |
| Nose Protection | Protective Nose Cone | Protective Nose Cone |
| Access and Maintenance | Accessible Service Points | Accessible Service Points |
| Additional Design Feature | Integrated Pusher/Pivot Point | Integrated Pusher/Pivot Point |
| Hinged Access Guard | Featured in product literature; confirm configuration | Featured in product literature; confirm configuration |
| Intended Applications | Forestry Clearing, Vegetation Management, Wildfire Prevention | Forestry Clearing, Vegetation Management, Wildfire Prevention |
Overall rating: 4.7 / 5 from 104 reviews.
I've started using the mulcher I on several parcels of land 10 acres . I have grind down a couple of 14 inch stumps. Caution the mount bracket behind the mulcher motor exhaust gets extremely hot even with gloves on . But the unit so far seems to works very good it's well put together.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
The Firminator G3 is s heavy duty quality machine. The discs worked extremely well and planting and culti-packing is very smooth and easy. Working with Dillon at Ripping It Outdoors was a very good experience and seamless transaction.
Product was fairly priced and they delivered it quickly.
The week before leaving for my mule deer hunt in Wyoming, I seeded the area surrounding the new runway at Wertheimer Airport in Norman. This past Tuesday, I returned to finish the job and was pleased to see that the seed I planted just two weeks earlier was already germinating and coming up nicely. These pictures show the freshly seeded areas alongside those planted two weeks ago. It’s a great comparison and a good example of what proper seedbed preparation and planting can accomplish. I used my Ferminator G-3, which is one impressive piece of equipment. It prepares the seedbed, plants the seed, smooths the soil, and firms everything up for good seed-to-soil contact—all in one efficient operation. I’ve owned and operated several no-till drills over the years, but I can say without hesitation that the Ferminator is the most efficient and versatile seeding machine I’ve ever owned. There’s something pretty satisfying about returning to a job and seeing those first green shoots coming through the ground. That’s when you know your hard work is paying off!
Pulls 100% better no sway and puts tongue weight over the axle
BP Conversions Bumper Puller Ball Hitch to Gooseneck Conversion System
Great machine. Working with Dillon was awesome. Even made me a custom mount for my Polaris.
Just got my Buffalo Turbine! Love it. Took a little bit to get used to getting the right angle for the nozzle, but not a problem. Side note, works much better if the frame is level as much as possible. Love it! Gary Haddock
Seems to be in order delivery wasn't able to use lift gate but tractor was able to take pallet off the truck bed. No damage to machine after visual check. won't know how it runs until rain stops. Staff at RippingitOutdoors was very quick to call and double check the type of backet needed for the unit to ensure the online order matched( to fit my skid steer quick attachment on my l2501 Kubota). Explained the teeth & belt could be ordered through them directly over the phone when/if needed as well as selling other types of custom made brackets for Utv's ect. All around Great customer service and would purchase from again.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14-15 HP | For Tractors
Great device. Makes my property look good.
The machine is a Land Shark! Gobbled up brush and small trees and turned them into mulch in no time!
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14-15 HP | For Tractors
The unit arrived within the timeframe that was given. It’s an amazing implement. Would definitely recommend
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
Hay rake works great. It’s a good value for the money. Ripping it outdoors was beyond helpful during the purchase!
Farm-Maxx Rotary Hay Rake | Model FRM-280 | Working Width 110" | 20+ HP | For Tractors
After spending way to much money for forest mulching services I discovered this wonderful machine. It's not a giant powerhouse forest mulcher, but it does everything a property owner needs to maintain a forested property. I wish I would have found it sooner.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractor
I wasn't sure what to expect, but it has proven to be a strong, durable, and terribly useful tool for clearing what I needed to clear. Thank you!
Works great and its easy to use.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
Love it . Now I am going to have to get a new tractor and a Lane Shark.
Baumalight MP330 Brush Mulcher | Cutting Path 30" | 15-40 HP | For PTO On Tractors
The Firminator is well built and functions well. I am having some trouble while planting mixed size seeds. Next time out I’ll try setting it so only the smaller seeds drop out the open it up for the larger seeds.
easy buying process and great communication. Mulcher works great, easily clears overgrown brush and even mulched a 5" thick mulberry tree fairly easily. running it off of my old 331 bobcat with no problem powering the drum at all. Only small issue which isn't a big deal is that the supplied hoses are about 16" too short to operate a full range of motion.
The Firmanator works great very well built .I am very happy I made this purchase.
This trap seems to be kinda hard to set off.
Works excellent and is very well made.
Over all built well. I like it is all cast iron and metal and not plastic. Had to modify fertilizer disc mount to fit correctly, nothing major, a little grinding. I modified the center link hitch point to accommodate my John Deere quick hitch. Have yet to plant with it but I’m sure it will work perfect. Love the grease fittings everywhere. Reminds me of the old farm equipment I grew up on, and still use periodically.
My firminator RT was delivered in good condition in ND. I will be using it next week. I have a 45 HP John Deere tractor that is supposed to lift 2000 lb but really struggles to lift this 6 foot firminator RT. I will just have to use in as a two pass operation for now. I do wish there was a better operating manual for this unit. Maybe that is something you can work on. I will give you an update once I start using it in a few days.
Great piece of equipment. Performs far better than I expected. One piece of advice - if property is significantly overgrown, consider the tractor attachment first to bring down the over growth and then switch to the UTV attachment to maintain property. No complaints worked perfectly.
Ordered a 36” clean out bucket for my mini excavator. Love it, welds are great. Works as it should.
Showed up on time and I will be using it to put in 15 acres of food plots in this weekend!
Great experience. Easy transaction and fast shipping. The blade is built well and heavy duty.
Works as expected
seeds come out way to fast at lowest setting when planting alfalfa literally the only reason I bought it now I can't even use it and I can't return it so I'm stuck with it for the price you pay you would think it would work!
It’s built solid. It handles Field grass hip high pretty well. With the maintaining the field grass after the first cut, the pasture field is starting to look like a lawn. The 84 inch with the best thing to get for 8 acres. It’s best to order belts for back up in the event if the belts were to break. But overall, I like the product quality is good.
Farm-Maxx Grooming Mower | FMR Series | Working Width 48", 60", 72" & 84" | 15-50 HP | For Tractors
Definitely a better unit than you can find locally. I've ran several spreaders. This is by far the best.
When I think of ripping it outdoors something else comes to mind, but I digress. This spreader is awesome. Works like a champ. The hopper is big enough to do my 1 acre lot for my applications. Just load once and go. I would highly recommend this spreader. It saves a ton of time and is a quality product.
the way it was built is hefty and looks to be easy to operate
Rammy 48", 55" & 61" ATV Snowblower 120/140/155 Professional Series SERIES 420CC Engine | For ATV
good experience
Farm-Maxx Snow-Blowers | FSNB Series | Working Width 54", 68" & 74" | 15-50 HP | For Tractors
Very smooth experience fantastic Equipment delivered on time, actually ahead of time. Great product looking forward to the results.
A good product !
Field Tuff 125 lb. Receiver Mount Spreader – 12V | Towing Power 15–25 HP | For ATVs, UTVs & Tractor
Looks great will use it this weekend
CL Fabrication Adapters | Multiple Styles | Universal Compatibility | Heavy-Duty Construction
Put this on Kubota 900 with winch hookup. This thing is a beast (within reason). I named it ‘Homie”, cause Homie don’t play. It will take care of stuff up to about 2” in diameter. You still have to remember that this is NOT like the ones on a bobcat or larger machinery. It does have its limits. But all in all I am very satisfied with it. Now on to the good part! The staff at Ripping It are outstanding! Especially Kayla in the office. She has gone above and beyond on making sure everything went right, from ordering to questions about installation. This young lady would be of great value at ANY company ! Her knowledge and personality are like over the top. This is my first experience with Ripping It Outdoors and I can only say positive things about them. With all that being said, I do fill out reviews on things I buy, AND I give a honest review. If it’s bad then you will know it. But if it’s good, well I tell the truth ! Again Kayla, from the bottom of my heart, a great big THANK YOU for all your help and just talking to you. I feel like we’ve know each other for years!
First Class communication and perfect delivery with great communication and fast. The equipment was excellent
TENT is easy to put up , material is tuff as told....only complaint is that i wish the bottom had about 3 to 4 inches overlap towards the inside so i could install a 2 x4 or something to help hold the tent down in high winds we have here in virginia thanks
