Woodmaxx MX-8600 6-inch PTO Woodchipper Review (2026)
6-inch self-feeding PTO chipper sized for compact and mid-frame tractors.
Woodmaxx MX-8600 infeed system: POW-R-TORQ hydrostatic feed explained
Manufacturer breakdown of the POW-R-TORQ hydrostatic infeed system that drives the MX-8600's self-feeding pull-through.
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- Self-feeding 6-inch capacity
- 7-year warranty
- Wide HP compatibility
- No hydraulic feed — forked material can hang up
- Step up to WM/MX 8-series for forked logs
How the self-feed actually behaves
The MX-8600 is self-feeding through an 8.25-inch octagonal infeed roller that runs off a small hydrostatic motor — Woodmaxx calls it POW-R-TORQ. It is not a true hydraulic-feed chipper like the WM-8H, and it does not have a separate reservoir and pump. The roller's job is to keep gravity-fed material moving at a controlled rate (0-75 ft/min, adjustable on the control bar) so the flywheel never gets buried. In practical terms it behaves like a mechanical self-feed with an assist: you drop a branch in, gravity and roller pull it down, you don't push.
Where this matters: clean 5-6 inch hardwood feeds at a steady rate without you babysitting it, and the dial-down control lets you slow the feed on dense oak so the 120 lb flywheel keeps RPM. Where it doesn't help: severely forked or limby wood still hangs up on the throat — the assist roller can't grab and reposition material the way the WM-8H's hydraulic feed can.
MX-8600 vs Woodland Mills WC68 — the actual decision
These two chippers are still the most cross-shopped pairing in the 6-inch PTO tier, but the 2026 pricing makes them no longer 'close.' WC68 is $3,450 MSRP (typically $3,105 on sale), 790 lb, 3-year warranty, 20–65 HP, hydraulic feed with an 8.25-inch powered infeed roller. MX-8600 is $4,790, 550 lb, 7-year warranty, 25–65 HP, hydrostatic-assist self-feed. The gap is $1,340 at MSRP and closer to $1,700 against the WC68's typical sale price. Same 6-inch capacity, similar feed technology — the meaningful differences are warranty length, feed-rate control, and parts shipping.
For most buyers in 2026, the WC68 is the clear value pick: it costs significantly less, has a heavier flywheel-to-machine ratio that owners praise on hardwood, and Woodland Mills' track record on the WC68 is one of the strongest in the category. The MX-8600 is the right buy when (a) you specifically want hydrostatic-assist variable-speed feed control to slow the feed rate on dense hardwood, (b) you plan to keep the chipper 7+ years and the four extra warranty years actually matter, or (c) US parts shipping out of Akron, NY beats Canadian-shipped Woodland Mills service for your situation. The premium is real — pay it deliberately, not as a default.
Tractor pairings and the HP sweet spot
Woodmaxx rates the MX-8600 for 25-65 HP tractors. The PTO HP sweet spot is 35-50 — that's where you get full 6-inch capacity on hardwood without the flywheel bogging. A Kubota L2501 (24.8 engine HP, ~21 PTO HP) is technically under-spec, and owners running it on hardwood at 6 inches report having to slow the feed. A Kubota L3301/L3901, John Deere 3033R/3038R, or Kioti CK3520 sits in the sweet spot. Above 50 PTO HP you have headroom but you're not getting more capacity — the 6-inch throat is the ceiling.
On a 25-30 HP tractor, plan for 4-inch hardwood as your comfortable working size, 6-inch only on green softwood, and slow feed rate on anything dense. This isn't a flaw in the MX-8600; it's the physics of a 6-inch chipper on minimum-spec HP. If you'll regularly chip 6-inch hardwood, either step up the tractor or step up to the WM-8H (8-inch, true hydraulic feed) on a 40+ HP machine.
Knife life and consumables
The MX-8600 ships with four reversible A-8 tool steel knives — two flywheel knives plus two bed knives. A-8 is the right steel pick for chipper service: tougher than D2, holds an edge better than carbon steel, less prone to chipping when you hit the inevitable buried nail or staple. Owners report 30-40 hours per edge on mixed hardwood before the feed rate visibly drops. Both edges are reversible, so a single set gives you 60-80 hours of chipping before you sharpen.
For property owners chipping 20-40 hours a year, that's one sharpening per season. Woodmaxx sells a sharpening service if you don't want to grind A-8 yourself — and you probably don't, because A-8 needs careful heat management on the belt sander or you'll blue the steel and lose temper. Sharpen at 30-40 degrees, quench every 10-15 seconds. Replacement knives run about $150 a set when you finally wear through both edges.
What's in the box
- MX-8600 chipper unit
- PTO shaft with shear pin (540 RPM)
- Blade set (2 knives, installed)
- 3-point hitch pins (Cat I / Cat II depending on tractor)
- Discharge chute
- Hardware bag
- Operator manual
- Tractor (25–65 HP with 540 RPM PTO)
- Quick-hitch adapter (if your tractor uses one)
- Ear protection and safety glasses
Ships freight. Self-feeding gravity-fed design. PTO shaft may need length adjustment for your specific tractor. Woodmaxx recommends verifying 3-point hitch category before ordering.
Woodmaxx MX-8600 6-inch PTO Woodchipper specs at a glance
- Brand
- Woodmaxx
- Model
- MX-8600
- Power type
- pto
- Max branch diameter
- 6"
- Power
- PTO-driven, 25–65 HP tractor
- Feed system
- Mechanical self-feeding
- Weight
- 550 lb
- Price (MSRP)
- $4,790
- Warranty
- 7 years
Will the MX-8600 fit my tractor?
The Woodmaxx MX-8600 6-inch PTO Woodchipper needs 25–65 PTO HP. Here’s how 26 common compact and utility tractors match up — rated PTO HP, not engine HP (after typical 10–15% drivetrain losses).
| Tractor | Engine HP | PTO HP | Hitch | MX-8600 verdict |
|---|---|---|---|---|
| Kubota BX23S | 22 | 15 | Cat 1 | Too small |
| Kubota LX2610 | 25 | 19 | Cat 1 | Too small |
| Kubota L2501 | 24 | 19 | Cat 1 | Too small |
| Kubota L3301 | 33 | 26 | Cat 1 | Fits |
| Kubota L3901 | 37 | 30 | Cat 1 | Fits |
| Kubota L4701 | 47 | 38 | Cat 1 | Fits |
| Kubota MX5400 | 55 | 45 | Cat 2 | Fits |
| Kubota M4-071 | 70 | 58 | Cat 2 | Fits |
| John Deere 1025R | 24 | 18 | Cat 1 | Too small |
| John Deere 2025R | 25 | 19 | Cat 1 | Too small |
| John Deere 3025E | 24.7 | 19 | Cat 1 | Too small |
| John Deere 3032E | 32 | 25 | Cat 1 | Fits |
| John Deere 3039R | 38.2 | 30 | Cat 1 | Fits |
| John Deere 3046R | 45.3 | 37 | Cat 1 | Fits |
| John Deere 4044M | 43.1 | 35 | Cat 1 | Fits |
| John Deere 4066R | 65.9 | 53 | Cat 2 | Fits |
| Mahindra 1533 | 33 | 26 | Cat 1 | Fits |
| Mahindra 2638 HST | 37.4 | 29 | Cat 1 | Fits |
| Massey Ferguson 1735M | 35 | 28 | Cat 1 | Fits |
| Massey Ferguson 2705E | 49 | 40 | Cat 2 | Fits |
| New Holland WORKMASTER 25S | 24.7 | 18 | Cat 1 | Too small |
| New Holland WORKMASTER 35 | 35 | 28 | Cat 1 | Fits |
| Kioti CK2620 | 24.5 | 20 | Cat 1 | Too small |
| Kioti NX4510 | 45 | 38 | Cat 1 | Fits |
| LS MT225S | 24.4 | 18 | Cat 1 | Too small |
| LS MT342 | 41.3 | 32 | Cat 1 | Fits |
“Fits” = within the manufacturer’s rated PTO HP range. “At limit” = below the minimum by 5–15%, will feel underpowered on seasoned hardwood. “Too small” = undersized for reliable chipping. “Oversized” = above range (works but overkill).
Who should buy the MX-8600 — and who should skip it
- 7-year MX-Series warranty — the longest in the 6-inch PTO category, two years more than the WC68
- Hydrostatic-assist infeed roller with variable 0–75 ft/min feed rate — meaningful control on dense hardwood
- 120 lb dynamically balanced flywheel keeps RPM up on sustained 5–6 inch hardwood feeds
- A-8 tool steel reversible knives — tougher than D2, longer edge life than carbon steel
- US assembly out of Akron, NY with same-day parts shipping (faster than Canadian-shipped Woodland Mills)
- Fits the 25–65 HP compact tractor sweet spot — sized correctly for Kubota L-Series and John Deere 3-Series owners
- Self-contained 2-quart hydrostatic system, not a full hydraulic reservoir — far less to maintain than a WM-8H
- Costs $1,340–$1,700 more than the Woodland Mills WC68 for the same 6-inch capacity — buy the WC68 if price is the deciding factor
- Hydrostatic-assist is not the same as true hydraulic feed — forked or crooked brush still hangs up where a WM-8H ($4,095) pulls through
- Under-spec for sub-25 HP subcompact tractors (Kubota BX, John Deere 1-Series) — the WC68's 20 HP minimum is friendlier for very small machines
- If you regularly chip over 5-inch hardwood, the 6-inch throat is a real ceiling — step up to the 8-inch WM-8H ($4,095) or WM-8M ($3,690), both cheaper than the MX-8600
- A-8 tool steel needs careful heat management to sharpen at home; budget for Woodmaxx's mail-in sharpening service or expect to pay a shop
Alternatives to the MX-8600
$360 more. 5-inch capacity (1 inch smaller). 5-year warranty. from Wallenstein.
$3,050 more. 7-inch capacity (1 inch larger). 5-year warranty. from Wallenstein.
$1,435 more. 8-inch capacity (2 inch larger). adds hydraulic feed.
MX-8600accessories & add-ons
Set of 2 replacement chipper knives. Available from woodmaxx.com.
PTO shaft shear pins for the MX-8600.
Heavy-duty PTO shaft for steep hitch angles or higher-HP tractors.
Adapter for iMatch or equivalent quick-hitch systems.
MX-8600blade replacement & sharpening
Same two-knife flywheel layout as the MX-8500G+, sized up for 6-inch throat.
A8 steel is hard enough to blue easily on a belt sander — quench every 10–15 seconds and keep pressure light.
- Blade count
- 2 flywheel knives
- Bed knife
- Yes — fixed anvil
- Sharpening angle
- 30–40°
- Reversible
- Yes — doubles edge life
- Blade material
- A8 tool steel
- Replacement set
- $140–$190
- Sharpening interval
- 30–40 hours
- Bolt torque
- 45–55 ft-lb
- 01Stop the machine and isolate power
Disengage the PTO, shut the tractor off, and remove the key. Wait 60+ seconds for the MX-8600 flywheel to stop completely — it coasts longer than the engine.
- 02Open the discharge or flywheel access cover
Remove the bolts on the MX-8600 flywheel access hood (or flip the hinged hood if equipped). Swing it clear so you have line-of-sight to every blade position.
- 03Rotate the flywheel to the first blade
Turn the flywheel by hand until the first of the 2 knives is aligned with the access opening. Mark it "1" with a paint pen so you can keep track of orientation.
- 04Break the blade bolts loose
Use a breaker bar on each of the 2 blade bolts. Woodmaxx and Woodland Mills both thread-lock these at the factory; heat gently if they don't yield. Do not pry on the flywheel itself.
- 05Slide the blade out and inspect
Remove the blade and inspect for cracks, nicks deeper than 1/16", and rounded bevels. A cracked blade goes straight in the scrap bin — never re-sharpened.
- 06Flip or replace the blade
The MX-8600 uses 2 reversible knives. If the secondary edge is still clean, simply flip the blade for a fresh edge. If both edges are worn, sharpen at 30–40° on a belt sander — quench every 10–15 seconds to avoid bluing the A8 tool steel.
- 07Balance the set
Remove equal material from every blade in the set. On the MX-8600's 2-knife flywheel, even a 1–2 gram imbalance shows up as vibration at operating RPM. Weigh on a gram scale after sharpening.
- 08Reinstall and torque
Apply anti-seize to the bolt threads (not the heads) and torque in a star pattern to 45–55 ft-lb. Use fresh lock washers — reused washers are the #1 cause of a loose blade downstream.
- 09Repeat for every remaining blade
Rotate the flywheel and repeat steps 3–8 for the remaining 1 knives. Then inspect the fixed bed knife — if the edge is rounded, flip or replace it and reset the blade-to-anvil gap to ~0.030" with feeler gauges.
- 10Close up and test-run
Rotate the flywheel by hand one full revolution to confirm no contact with the bed knife or housing. Close the access cover. Start the tractor, engage PTO at low idle, and listen for 30 seconds before ramping to operating RPM. Feed one small test branch before returning to normal work.
Real owners on the MX-8600
- Self-feed works well on straight stock. Owners report the MX-8600 grabs clean branches aggressively, rivalling hydraulic machines on straight feeds.
- Crotches and forks will stall it. Frequent complaint: mechanical self-feed rejects forked wood, forcing the operator to pre-cut. A known limitation at the price point.
- Great value under $3.5k. Repeated theme: for homeowners who mostly chip pruned limbs, the 8600 punches above its weight versus box-store 6-inch units.
“For straight branches up to 5 inches, the self-feed is almost as fast as my neighbor's hydraulic machine. Forked wood is where it loses.”
“Had to cut every crotch off before feeding. After the tenth time I sold it and stepped up to the MX-8800. Know your wood before buying.”
“Three seasons, knives rotated once, bearings still tight. Pricey, but for what you get I do not know what else touches it. Just respect the 6-inch limit.”
“Self-feed is aggressive. If the branch grabs and you did not expect it, the tree end whips. Wear a helmet, not just glasses.”
Quotes are short excerpts used editorially with attribution. Click any source link to read the full thread.
MX-8600 — frequently asked questions
- Should I buy the MX-8600 or the Woodland Mills WC68?
- Buy the WC68 if price matters at all — the MX-8600 is $4,790 versus the WC68's $3,450 MSRP (typically $3,105 on sale), a $1,340–$1,700 gap. Buy the MX-8600 only if you specifically want hydrostatic-assist variable-speed feed control on dense hardwood, the 7-year warranty (four more than WC68's 3-year), or faster US parts shipping out of Akron, NY. The MX-8600 is the premium choice; the WC68 is the value choice for most buyers.
- How does the MX-8600 handle forked or crooked branches?
- Better than a pure mechanical-feed chipper, worse than a true hydraulic-feed unit. The hydrostatic-assist roller keeps controlled pressure on the branch, which helps it bite into forked stock that a gravity-only feed would stall on. But the roller can't reverse-feed or reposition material like the WM-8H's hydraulic feed — limby brush piles still need hand-trimming before they go in.
- What's the PTO HP sweet spot for the MX-8600?
- 35-50 PTO HP. Below that (25-30 HP), you'll feel the limit on 6-inch hardwood and need to slow the feed. Above 50 HP you have headroom but no more capacity — the 6-inch throat is the ceiling. Most owners run it on a 30-45 PTO HP compact tractor (Kubota L-Series, John Deere 3-Series, Kioti CK).
- MX-8600 or MX-WM-8H — when does the 8-inch step-up make sense?
- Step up to the WM-8H (8-inch, true hydraulic feed) if you regularly chip material over 5 inches, deal with forked or crooked brush, or run a 40+ HP tractor where you have the PTO HP to use the larger throat. Stay with the MX-8600 if your typical material is under 5 inches, your tractor is 25-40 HP, or you specifically want the 7-year MX-Series warranty (the WM-8H is 3 years; the MX-Series 8-inch equivalent is the MX-8800 at significantly higher cost).
- Is the MX-8600 made in the USA?
- Final assembly and the A-8 tool steel knives are US-made out of Akron, NY. Like every chipper in this price tier, some components (orbital motor, fasteners, gas springs) are sourced globally. This matters for parts availability — Woodmaxx typically ships replacement parts same-day from inventory in NY, which is the practical advantage over Canadian-shipped Woodland Mills parts for US buyers.
- How long do the knives last between sharpenings?
- 30-40 hours per edge on mixed hardwood. Both flywheel knives are reversible, so a full set gives 60-80 hours of chipping before you need to sharpen. For typical property owners running 20-40 hours a year, that's one sharpening per season. Woodmaxx offers a mail-in sharpening service if you'd rather not grind A-8 tool steel yourself.
- What are the common problems with the MX-8600?
- The most-reported issue is feed hang-ups on forked or crooked branches — the mechanical self-feed works well on straight material but stalls on irregular shapes. Clear jams by hand (with the PTO disengaged). Discharge chute clogging on wet chips is also common. Both are operational, not defects.
- MX-8600 vs wm-8h — which should I buy?
- See our head-to-head comparison for the detailed breakdown. In short: the MX-8600 at $4,790 offers 6-inch capacity with mechanical self- feed. The right pick depends on your tractor HP, branch size, and whether you need hydraulic feed for forked material.
- MX-8600 vs woodland mills wc68 — which should I buy?
- See our head-to-head comparison for the detailed breakdown. In short: the MX-8600 at $4,790 offers 6-inch capacity with mechanical self- feed. The right pick depends on your tractor HP, branch size, and whether you need hydraulic feed for forked material.
- How do I replace or sharpen the blades on the MX-8600?
- The MX-8600 uses high-carbon A8 tool steel reversible dual-edge knives. Sharpen once per season for typical use (20–40 hours/year), or every 15–20 hours under heavy hardwood load. A replacement blade set runs roughly $80–$250 depending on the model. See our blade sharpening guide for the step-by-step process.
- How heavy is the MX-8600 and what hitch does it need?
- The MX-8600 weighs approximately 550 lb. It mounts to a standard Category 1 or 2 three-point hitch. Check your tractor's hitch lift capacity — most Category 1 tractors lift 1,200–1,800 lb at the pins.
- MX-8600 vs softwood capacity — which should I buy?
- See our head-to-head comparison for the detailed breakdown. In short: the MX-8600 at $4,790 offers 6-inch capacity with mechanical self- feed. The right pick depends on your tractor HP, branch size, and whether you need hydraulic feed for forked material.
- Is the MX-8600 worth buying?
- At $4,790, the MX-8600 is the mid-to-premium tier — justified for regular use on wooded properties or buyers who want long-term reliability. The 7-year warranty provides strong long-term protection.
- How much HP do I need to run the MX-8600?
- The MX-8600 needs 25–65 PTO HP. That's PTO horsepower (roughly 85–90% of engine HP). A 29 HP engine tractor produces about 25 PTO HP. Comfortable range: 31–59 PTO HP.
- What warranty does the MX-8600 come with?
- Woodmaxx covers the MX-8600 with a 7-year warranty. This is the MX-Series warranty — the longest in the PTO chipper category. Covers manufacturing defects; excludes wearing parts (blades, belts) and cosmetic damage.