CompareUpdated August 14, 2026
Woodmaxx FM-96H vs MechMaxx KDK72H: Cat 2 side-shift
The only two Cat 2-only flails most shoppers actually cross. Hitch is the first filter. After that it is 85″ of Woodmaxx (the 96 is the name) versus a 72″ KDK frame with heavier individual hammers and less total hammer mass.
By Tom Brennan · Editor
$5,825 · 85″ · Cat 2 · 1351 lb
$3,699 · 72″ · Cat 2 · 1085 lb
Buyer fit
Who should buy FM-96H vs KDK72H
If your three-point is Category 1, stop. NAM72H and FM-78H are the next pages. This pair only starts after Cat 2 pins and lift are real.
Buy the FM-96H if…
- + You have Cat 2 geometry, 50–90 PTO HP (7.06 HP/ft at the floor), and lift for 1351 lb at the pins.
- + 85″ of cut and a Y-blade order option beat a 13″ width gap versus KDK.
- + A 2-year parts warranty is part of the price at $5,825.
Buy the KDK72H if…
- + Cat 2, 50–75 PTO HP (8.33 HP/ft at the floor), and 72″ is enough. You want a heavier frame than NAM72H without 85″ of width.
- + ~13″ of hydraulic extend and 2.7 lb individuals matter more than total rotor mass (~43.2 lb).
- + You will verify the listed 31.5 mph tip speed before treating it as a performance claim.
Hitch first
Can a Category 1 tractor run FM-96H or KDK72H?
No. FM-96H, KDK63H, and KDK72H are the Cat 2-only trio. NAM72H is still Cat 1 even at 72″. Do not shop this pair from a compact three-point, and do not treat KDK’s 2.7 lb hammers as proof it carries more steel on the rotor.
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| Spec | FM-96H | KDK72H | Edge |
|---|---|---|---|
| Hitch | Category 2 only | Category 2 only | Tie |
| Cut (name vs actual) | 85″ (FM-96H name ≠ cut) | 72″ (name matches) | FM-96H |
| Machine weight | 1351 lb | 1085 lb | KDK72H |
| Individual hammers | 18 × ~2.5 lb | 16 × ~2.7 lb | KDK72H |
| Total hammer mass | ~45.0 lb | ~43.2 lb | FM-96H |
| Side shift | Hydraulic (cut-edge vs PTO) | Hydraulic extend ~13″ | FM-96H |
Does KDK72H have more hammer mass than FM-96H?
No. KDK72H lists 16 hammers at about 2.7 lb. FM-96H lists 18 at about 2.5 lb. Multiply and the Woodmaxx rotor is slightly heavier: ~45.0 lb versus ~43.2 lb. The “heavier hammer” talking point is about each casting, not the pack.
Belt count also fails as a shortcut. KDK72H lists 5× AV17x1245. FM-96H lists 4× BX39 Gates. More belts is not a verdict. Tip speed is the number to distrust: MechMaxx prints 31.5 mph on a 6″ tube at 2,082 RPM with a 16″ swing. RPM × swing lands near 99 mph. Flag the listing; do not advertise 31.5 as slow-cut proof or as a feature.
What FM-96H owners say that KDK72H forums do not
Woodmaxx hosts 12 FM-96H reviews as of this writing. Independent KDK72H threads are still thin, so this pair is lopsided on evidence, not on hitch class. jdmiller4 (November 2024) was impressed with construction after short use and named Woodmaxx staff for delivery coordination, freight touch-up, and start-up questions. Jim Edmonds (June 2022) called it a heavy-duty mulching machine for 40 acres.
Older page reviews like leftover pasture mulch and a quiet hydraulic-shift deck (Sid Blackman, 2021) are manufacturer-hosted. TractorByNet shoppers in the Caroni vs FM-78 thread floated the FM-96H as a quality-looking wide unit and asked about recutting bars. That is shopping talk, not hours on a KDK. Do not invent a KDK owner chorus to balance the page.
Spec sheet
FM-96H vs KDK72H specs
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| Spec | FM-96H | KDK72H | Edge |
|---|---|---|---|
| Cutting width | 85″ | 72″ | FM-96H |
| PTO HP range | 50-90 | 50-75 | Tie |
| Hitch | Category 2 | Category 2 | Tie |
| Machine weight | 1351 lb | 1085 lb | KDK72H |
| Shipping weight | 1432 lb | 1232 lb | KDK72H |
| List price | $5,825 | $3,699 | KDK72H |
| Price per inch of cut | $69 | $51 | KDK72H |
| Warranty | 2 years | 1 year | FM-96H |
| Side shift | Hydraulic (no tilt) | Hydraulic (no tilt) | Tie |
| Rear remotes required | 1 | 1 | Tie |
| Blade options | hammer, y-blade | hammer | FM-96H |
Driveline
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| Spec | FM-96H | KDK72H | Edge |
|---|---|---|---|
| Rotor diameter | 5″ | 6″ | KDK72H |
| Rotor RPM | 2,146 | 2,082 | FM-96H |
| Blade tip speed | 96 mph | 31.5 mph | FM-96H |
| Hammer setup | 18 × ~2.5 lb | 16 × ~2.7 lb | FM-96H |
| Total hammer mass | ~45.0 lb | ~43.2 lb | FM-96H |
| Belt drive | 4× BX39 (Gates Truflex) | 5× AV17x1245 | Tie |
| PTO protection | See manufacturer | See manufacturer | Tie |
| Cutting height | 0.75″-4″ | 0″-3″ | Tie |
Woodmaxx FM-96H strengths and tradeoffs
Large-acreage operators with 50+ PTO HP who need maximum width and reach.
Pros
- Widest cut in the Woodmaxx FM line
- Hydraulic side shift for fence lines and pasture edges
- Heavy structural steel and commercial-leaning build
Cons
- Overkill for subcompacts and many mid-size compacts
- Highest price and shipping weight in the lineup
- Needs serious ballast and lift capacity
MechMaxx KDK72H strengths and tradeoffs
Cat 2 utility tractors needing wide side-shift mowing with heavier hammers and frame weight than the NAM-H series.
Pros
- 72″ cut with heavy 2.7 lb hammers
- Cat 2 hitch, 6″ rotor, and five-belt drive
- Heavier-duty Cat 2 step up from NAM-H for larger utility tractors, not more hammer mass than NAM72H
Cons
- 1,085 lb machine weight and 1,232 lb shipping weight require planning
- No ditch-bank tilt articulation
- Published 31.5 mph tip-speed figure looks anomalously low and should be verified
Owner signal
What owners report about FM-96H vs KDK72H
FM-96H
Themes paraphrased from Woodmaxx product-page reviews (12 reviews as of 2026-08-14) and TractorByNet shopping comments. Not a scientific sample. SKU-specific independent forum volume is thinner than FM-78H.
- Heavy-duty first impression. Reviewers call the 85″ deck extremely heavy-duty. One November 2024 owner (jdmiller4) was impressed with construction after short use; Jim Edmonds (June 2022) called it a heavy-duty mulching machine for 40 acres.
- Freight dings and setup help. The same November 2024 review credited Woodmaxx staff by name for delivery coordination, shipping touch-up, and start-up questions. Treat that as support signal, not a claim that freight always arrives clean.
- Pasture mulch leftover. A 2021 owner said leftover pasture the cows did not eat was nicely mulched and looked better than prior years.
- Quiet and hydraulic shift. Sid Blackman (Sept 2021) called it quiet, efficient, and heavy, and specifically liked hydraulic side shift.
- Cat 2 size caution. Praise assumes a Category 2 tractor that can lift about 1,351 lb. Compact Cat 1 buyers are outside this SKU.
KDK72H
Themes are editorial interpretations from manufacturer-published specs and value comparisons (retrieved 2026-08-14). Independent owner review volume for this SKU is still thin.
- Wide KDK option. KDK72H brings the Cat 2 KDK package to 72″ for buyers who want NAM72H width with heavier build claims.
- Heavy transport reality. Machine weight and overall width make lift, gates, and delivery planning central.
- Tip-speed anomaly. The published blade-speed number looks anomalously low and should be verified before relying on it.
- KDK vs Woodmaxx support. KDK competes on direct price and heavy specs; Woodmaxx comparisons keep stronger warranty/support positioning.
Final call
FM-96H vs KDK72H: which should you buy?
Choose FM-96H when width, knives, and two years of parts coverage justify $5,825 and 1351 lb on a Category 2 hitch. The name is 96. The cut is 85″.
Choose KDK72H when 72″ of Cat 2 side-shift at $3,699 is the job. Heavier hammers each, slightly less total mass, listed tip speed flagged. Independent owner volume for this SKU is still thin.
FM-96H vs KDK72H FAQ
Can a Category 1 tractor run FM-96H or KDK72H?+
Not on the published hitch. Both are Category 2 only. Compact Cat 1 buyers should stop at FM-78H or NAM-H. This pair is the Cat 2-only filter in the catalog, with KDK63H as the third Cat 2 SKU.
Does KDK72H have more hammer mass than FM-96H?+
No. KDK hammers are heavier each (2.7 lb vs 2.5 lb), but there are fewer of them (16 vs 18). Totals are about 43.2 lb on KDK72H versus 45.0 lb on FM-96H. Heavier individuals are not a heavier rotor pack.
Is the KDK72H 31.5 mph tip speed real?+
MechMaxx lists 31.5 mph. That looks anomalously low next to 2,082 RPM × a 16″ swing (near 99 mph). This catalog flags the listed figure as manufacturer-stated, verify, not as a selling point.
How much extra does the FM-96H cost versus KDK72H?+
About $2,126 at list ($5,825 vs $3,699). You also pick up 13″ of cut and about 266 lb of machine weight (1351 lb vs 1085 lb). The Woodmaxx premium is width, Y-blades, and a 2-year warranty, not more total hammer mass.
Does either deck tilt for ditch banks?+
Neither. Both stay level. Banks are MechMaxx VAM, grass-only, two remotes. Do not shop this Cat 2 pair as a ditch-bank substitute.
Woodmaxx FM-96H vs MechMaxx KDK72H: which should I buy?+
Buy FM-96H if you need 85″ of cut, Y-blades, and a 2-year warranty on a Cat 2 tractor that can lift 1351 lb. Buy KDK72H if 72″, ~13″ of extend, and a Cat 2 frame at $3,699 is enough, knowing total hammer mass is slightly lower, not higher.