THE TRADEOFFS, EXPLAINED

TMG TFMS50 vs WoodMaxx FM-78 hammer: 49 inches with side shift or 70 inches fixed, Category 1 or 2

TFMS50 and FM-78 cover the same power, so on a KIOTI DK5520 (46.4 or 45.6 PTO hp, 55 engine hp) the hitch and the cut decide. TFMS50 is Category 1 only and moves its 49-inch cut about 14 inches sideways on a hydraulic cylinder. FM-78 is fixed, cuts 70 inches and fits Category 1 or 2 with bushings. KIOTI lists the DK5520’s hitch as Category II in its brochure and manual and Category 1 on its web page.

By Acreage Equipment · Reviewed November 9, 2026 · Specification research, not a field test

Compare these two with my tractor Compare the complete purchase cost →

TMG Industrial

TFMS50

30–60 hp · basis unclear · 49″ Working cut, inches

$2,799 checked November 7, 2026

Check current price at TMG Industrial

Specs & tractor check →

WoodMaxx

FM-78 · Hammer blades

30–65 PTO hp · Hammer blades only · 70″ Cutting width, inches

$3,900 checked November 7, 2026

Check current price at WoodMaxx

Specs & tractor check →

START WITH THE DECISION

Consider TFMS50 for reach on a Category 1 tractor with a remoteShortlist TFMS50 when the tractor has Category 1 ends, a rear remote with matching couplers, PTO power under 50 hp and work along fences or ditches.

Consider FM-78 for a wide fixed cut on Category 1 or 2Shortlist FM-78 when the tractor has 30–65 PTO hp, the hitch may be Category 2 and a 70-inch cut that spans the tires is wanted.

Read the evidence behind the choice ↓

Observed U.S. seller prices, checked November 7, 2026, from the retained product records. Prices were not refreshed for this comparison. Tax, shipping, options and the final seller quote may change the delivered total; these are dated observations, not a live price or stock feed. Open your saved comparison →

The differences that matter.

A 50-PTO-hp ceiling against 65

TMG’s page and manual table say 30–60 hp without a basis; its manual separately says tractor power must not exceed 50 PTO hp. WoodMaxx’s manual gives FM-78 30–65 PTO hp.

At 46 PTO hp both are inside; TFMS50 has 4 hp of room under its manual ceiling, FM-78 19.

Category 1 against Category 1 or 2

TFMS50 is listed for Category 1. WoodMaxx’s manual and page hero support FM-78 on Category 1 or 2 with bushings; lower page text says Category 1 only.

On a tractor with Category 2 lower-link ends, only FM-78 has a documented fit.

Side shift against a wide fixed cut

TFMS50 cuts 49 inches with about 14 inches of hydraulic side shift. FM-78 cuts 70 inches at fixed offsets of 33 inches left and 46 inches right of center.

TFMS50 reaches sideways along fences and ditches but needs a rear remote; FM-78 covers a 63-inch tractor’s tracks in one pass without hydraulics.

660 lb against 880 lb

TMG lists TFMS50 at 660 lb operating weight (manual structure 300 kg). WoodMaxx’s manual lists FM-78 at 880 lb; its page lists 710 lb plus a 39-lb shaft.

FM-78 is the heavier rear load by about 220 lb; both are well under a 2,716-lb lift at 24 inches.

$2,799 against $3,900

TFMS50 was observed at $2,799 and FM-78 hammer at $3,900 on November 7, 2026.

FM-78 cost $1,101 more on these dated observations for 21 more inches of cut and a Category 2 option.

A CONDITIONAL SHORTLIST

Which direction makes sense?

Consider TFMS50 for reach on a Category 1 tractor with a remote

Shortlist TFMS50 when the tractor has Category 1 ends, a rear remote with matching couplers, PTO power under 50 hp and work along fences or ditches.

Check current price at TMG Industrial Prepare questions for the seller

Consider FM-78 for a wide fixed cut on Category 1 or 2

Shortlist FM-78 when the tractor has 30–65 PTO hp, the hitch may be Category 2 and a 70-inch cut that spans the tires is wanted.

Check current price at WoodMaxx Prepare questions for the seller

Keep these source limits with the decision.

TFMS50’s page and manual table say 30–60 HP without a basis while its manual says tractor power must not exceed 50 PTO hp; image text mentions 20–50 HP.

FM-78’s page hero and manual support Category 1 or 2 with bushings while lower page text says Category 1 only; page weight (710 lb plus 39-lb shaft) differs from the manual’s 880 lb.

This comparison reuses the manufacturer evidence retained in the product records reviewed November 7, 2026; product pages were not re-fetched on November 9. TFMS50 uses the current product page and the January 2025 manual; FM-78 uses the current product page and the 2025-to-current WoodMaxx manual.

FOLLOW THE NUMBERS

Sources & documentation

Research record reviewed November 9, 2026. Confirm the current manual and the exact revision supplied with your machine.

Official U.S. TFMS50 page: operating specifications and price30–60 HP table; 49-in. working cut; about 14 in. hydraulic side shift; 660-lb operation weight; price
TMG TFMS50/60/72 manual, 2025-01-09p6: tractor power must not exceed 50 PTO hp; cutting width 1,250 mm
WoodMaxx FM-78 official product pageBlack/hammer SKU FM-78-0006; 30–65 PTO hp; 70-in. cut; 80 in. overall; weight; hitch type; price
WoodMaxx 2025-to-current FM series operator manualPrinted p40 / PDF p41: blade-specific PTO requirements, cutting width, fixed extents, hitch category and Category 2 bushings, product weight
WoodMaxx manual index: Models 2025 to current