GKB Combinator | CB Series | Working Width 48", 63", 79" & 95" | 35-110 HP | For Tractors
DESCRIPTION
The GKB Combinator is the ultimate tool for removal of unwanted turf and fraise (fraze) mowing. This machine has the capability to remove up to 2″ of unwanted material in a single pass. This allows you to run a clean and efficient operation, totally removing the organic matter and leaving a clean and level surface. This is the only step needed before re-seeding or laying sod.
In addition to complete turf removal, the GKB Combinator can be adjusted fraise mowing! Fraise (Fraze) mowing is a thatch management practice founded in the Netherlands (home of GKB Machines) in the mid 1990s. The Combinator was designed, built and perfected by the family that created the first ever fraise mower.
The solid steel rotor on the Combinator is driven by a high speed belt system and the working depth can easily be adjusted without tools. The rollers are connected to a pendle system that allows you to adjust the front and rear rollers simultaneously. The Combinator’s elevator belt folds flat for transportation!
Key Features
Model Options: CB120, CB160, CB200, and CB240 for scalable turf renovation across field sizes
Working Widths: 48″, 63″, 79″, and 94.5″ to match coverage needs from compact to full-field operations
Combi-Rotor System: Hybrid rotor enables stripping, fraising, and verticutting in a single pass
Fraising Blades: 56 to 92 blades depending on model for aggressive surface removal and soil prep
Verticutting Blades: 58 to 94 blades for vertical slicing and turf rejuvenation
Working Depth (Fraise & Strip): Up to 2″ depth for effective surface removal and leveling
Working Depth (Verticutting): Up to 1.5″ depth with center-to-center spacing (1×2×3) for precision turf cutting
Pendel System: Front and rear rollers stabilize operation and maintain consistent ground contact
PTO Shaft: Walterscheid PTO shaft ensures reliable power transfer and mechanical durability
Power Requirement: Ranges from 35–110 HP depending on model; matched to tractor class and field intensity
Linkage Type: 3-point hitch Cat. 1 for CB120; Cat. 2 for CB160, CB200, and CB240 for secure mounting
Hydraulic Valve (Conveyor Belt): Double-acting system with flow rates from 5.25 to 13.24 gal/min for belt control
Hydraulic Valve (Inclined Conveyor): Double-acting fold mechanism for transport and storage efficiency
Operational Dimensions: Vary by model; designed for full-field coverage with compact transport profiles
Weight: 1323 lbs to 3087 lbs depending on model; heavier units offer increased stability and cutting force
Versatile Turf Management: Perfect for both complete turf removal and targeted fraise mowing.
User-Friendly Operation: Designed for easy adjustments and efficient workflow in the field.
Durable Build Quality: Constructed with robust materials to withstand the rigors of professional use.
Hydraulic Operation: Includes hydraulic valves for controlling the conveyor belts for smooth operation.
Detailed Specifications
CB120 and CB160
Specification
CB120
CB160
Pendel System
Front and rear roller
Front and rear roller
Combi-Rotor
Hybrid for stripping, fraising, verticutting
Hybrid for stripping, fraising, verticutting
Fraising Blades
56
64
Verticutting Blades
58
66
PTO Shaft
Walterscheid PTO shaft
Walterscheid PTO shaft
Working Width
48 inches
63 inches
Working Depth (Fraise Mowing & Stripping)
Max 2 inches
Max 2 inches
Working Depth (Verticutting)
Max 1.5 inches (c.t.c 1x2x3)
Max 1.5 inches (c.t.c 1x2x3)
Operation Dimensions (LxWxH)
49 x 114 x 48 inches
63 x 139.75 x 59 inches
Transport Dimensions (LxWxH)
49 x 67 x 35.5 inches
63 x 81 x 39.5 inches
Weight
1323 lbs
1984 lbs
Power Requirement
35-45 hp
40-70 hp
Linkage
3-point hitch, Cat. 1
3-point hitch, Cat. 2
Hydraulic Valve (Conveyor Belt)
5.25 gal/min (double-acting)
10.5 gal/min (double-acting)
Hydraulic Valve (Inclined Conveyor)
Double-acting to fold
Double-acting to fold
CB200 and CB240
Specification
CB200
CB240
Pendel System
Front and rear roller
Front and rear roller
Combi-Rotor
Hybrid for stripping, fraising, verticutting
Hybrid for stripping, fraising, verticutting
Fraising Blades
76
92
Verticutting Blades
78
94
PTO Shaft
Walterscheid PTO shaft
Walterscheid PTO shaft
Working Width
79 inches
94.5 inches
Working Depth (Fraise Mowing & Stripping)
Max 2 inches
Max 2 inches
Working Depth (Verticutting)
Max 1.5 inches (c.t.c 1x2x3)
Max 1.5 inches (c.t.c 1x2x3)
Operation Dimensions (LxWxH)
67 x 173 x 63 inches
71 x 205 x 71 inches
Transport Dimensions (LxWxH)
63 x 96.5 x 43.5 inches
71 x 112 x 71 inches
Weight
2425 lbs
3087 lbs
Power Requirement
65-95 hp
90-110 hp
Linkage
3-point hitch, Cat. 2
3-point hitch, Cat. 2
Hydraulic Valve (Conveyor Belt)
10.5 gal/min (double-acting)
13.24 gal/min (double-acting)
Hydraulic Valve (Inclined Conveyor)
Double-acting to fold
Double-acting to fold
Manuals & Documents
General Warranty Info:
Ripping It Outdoors works closely with our manufacturers to supply and support your products warranty needs as best as possible!
The majority of products come with a manufacturer represented warranty against manufacturing defects for at least a 12 month period after the date of sale.
Expendable components and "wear parts" including but not limited to blades, knives, teeth, oil, chain sprockets, skid shoes, knife mounting discs, and similar components are usually excluded from manufacturer warranties.
Please reach out to us for any specific warranty information needed about products and parts you can’t find!
Videos
Shipping
General Shipping Info:
Instantly calculate shipping quotes to the lower 48 states by 1. adding this product to your cart, 2. click continue to the checkout page and 3. enter your shipping address to check rates. Contact us for quotes for shipping to Hawaii, Alaska, Canada, Mexico and Internationally.
Complimentary lift gate service on all freight shipments where it’s possible. We guarantee safe delivery!
Low shipping rates for customers. We have negotiated the best possible rates for customers from our trusted carriers (ODFL, ESTES, UPS, and FedEx).
Negotiate shipping rates if you think we can do better please reach out. Keep in mind some shipping rates also include assembly & configuration as well!
Customer Reviews
Overall rating: 4.6 / 5 from 102 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.
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.
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.
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.
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.
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.
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.
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!
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
Hi, my name is Ken. I’ve had a great experience with Ripping It Outdoors. I purchased a Forax Hp40 Mulcher for my mini excavator. Kayla Patterson is who I dealt with from the beginning until I received it at my house. She has been wonderful to work with and looking forward to working with her with any other orders I purchase. Kayla answered any questions I had and kept me updated throughout the whole process, can’t say it enough just a wonderful person to work with!!