TS51 Drum Mower-Conditioner by Terra

SKU: TE130DR Categories: , , , ,

These top of the line drum mowers are designed for maximum production rates with minimum down time, and have several exclusive features not found on other brands. With a built-in flail conditioning system, this mower will spread the cut crop and reduce drying time, often eliminating the need for a separate tedder operation. Durability and fast cutting speeds will get you in and out of the field in less time and without hassle.


Call 260-225-3429 to check for the availability of this product!

This line of drum mowers manufactured by Terra of Italy is designed for hay producers who want higher production rates and fewer problems in the field.  With these machines you get high speed cutting and conditioning all in one machine, and with very few moving parts.

The design of a drum mower is mechanically much simpler than sickle bars, disc mowers, discbines, and haybines.  For part-time producers, it is a superior design that cuts faster with fewer problems.   The drum mower design, which has been very prominent in Europe for decades, is finally gaining popularity here in the US, and rightly so.

In the past, the only drawback of drum mowers was that they will windrow the cut crop into a tight pile that does not dry well.  If you can imagine the cut grass stacked like a row of fallen dominoes, you have the idea of how conventional drum mowers windrow hay.  This tight windrow cannot be directly baled because the underside will never dry.  It needs to be spread out with a tedder to dry, and then raked into windrows.

We’ve solved this problem with our exclusive conditioning system.  A series of teeth have been added to the neck of the cutter drum.  These teeth provide a flailing action that ejects the hay out the back of the mower, spreading and fluffing it in the process.  The result is a faster drydown time that rivals complicated and expensive haybines and discbines.  The conditioning system has no moving parts and requires no adjustments. Completely maintenance free, it’s working whenever you’re mowing.  And these machines now come standard with bolt-on teeth to increase the conditioning action.

A drum mower has only two large counter-rotating drums.  These drums create a great deal of inertia, helping you to power through the thickest hay conditions.  The drums are powered from above by a simple gearbox, not with multiple small gears from below like a disc mower.  A simple breakaway system ensures that if you accidentally hit an unmovable object, the mower will swing rearward, avoiding damage.  Simply back up to reset and you can continue mowing.

These drum mowers use only 3 inexpensive, reversible blades per drum.  They can be easily sharpened or simply replaced when dull.  Replacing a blade takes only a few seconds.  The only tool needed is stored right on the mower, so it is always with you.  No bolts, no time consuming adjustments.  Just change and go.

Terra has added other innovations to the drum mower design as well.  While other manufacturers continue to use belts between the main PTO and the drum gearbox, Terra mowers use a durable shaft-driven system.  Shaft drive means no belts to come off, slip, or break at the most inconvenient times.  Terra also supports the main drum gearbox centrally, so that the ground pressure is evenly distributed between the two drums, instead of supporting on the end like other brands.  Central support is easier to adjust and the drums better follow ground contours, leading to a better cut.

Features not available from other manufacturers include:

  • Adjustable frame allows for a better fit on a wider variety of tractors.  Comfortably fits tractors as narrow as 3’-6” and as wide as 6 feet.
  • Improved protection frame and heavier canvas cover reduce dust and projectiles
  • All-shaft drive for long life and efficient power transfer
  • Built-in conditioning system reduces drying time compared to conventional drum mowers, sickle bars, and disc mowers.  Additional teeth can be added for more aggressive conditioning action.
  • Central support of drums follows contours better and reduces drum wear.
  • Helical gears provide efficient, quiet power transfer and will last longer than conventional bevel gears.
  • Optional lift kit gives you the option of different cutting heights.
Model TS51 Drum Mower-Conditioner
Manufacturer Model Sarracenia 130
Cutting width 4’3”
Number of cutting knives 3 knives/drum
Number of conditioning teeth 6 teeth/drum
Weight 742 lbs
Folding for transport manual
Mowing capacity 4 acres/hr.
Minimum tractor engine power 25 HP
Minimum tractor weight 2000 lbs
Tractor hitch and PTO Category 1, 540 RPM PTO
Tractor width (min.) 3’4”
Tractor width (max.) 6’

Crate Length Width Height
Dimensions 88″ 39″ 35″
Machine Weight 742 lbs
Ship Weight 860 lbs

Terra TS51 Drum Mower-Conditioner is shipped partially disassembled, boxed, and palletized, with instructions for assembly included in the crate (and written in plain english). Our friendly staff is also available to assist you with any questions or concerns you have over the phone. We are the only hay equipment seller that provides our customers with this level of service to ensure a trouble free assembly that will get you out in the field in no time.

Shipping rates apply to the continental United States only. Please call 260-225-3429 to inquire about shipments to Alaska, Hawaii, or international.

Drum Mowers
Delivery Type Continental US – Model TS51
Commercial or Freight Terminal $ 399.00
Farm/Residential with lift gate $ 479.00
Pickup from warehouse FREE

The cost of assembly for this item is $200.00. This item may not be able to ship fully assembled. Please contact us for details.

Hay mowers come in all shapes and sizes, from mini sickle bar mowers to the largest trailed mower-conditioners and even self-propelled machines. For the sake of brevity, we will concentrate here on hay mowers that are meant to be mounted to your tractor’s 3-point hitch. For 99% of our customers, this is the best solution.

There are three primary styles of hay mowers: Sickle bar, disc, and drum. Each has its advantages and disadvantages. In order to choose the mower that will work best for your situation, first fit the mower to the size of your tractor and then determine how you will be using it.

The sickle bar mower was the first mechanical mower and was originally pulled by horses. The design is much the same today as it was then. The mower works with a reciprocating action, moving triangular blades back and forth between stationary guard fingers. Each back and forth action shears off any grass or vegetation that is between the stationary fingers. The action is the same as a set of barber’s clippers cutting hair. This type of mower can be used to cut hay as well as for other general mowing duties. The best sickle bar mowers currently being produced use a double action where the guard moves in the opposite direction from the blades. This doubles the effective blade speed, and also greatly reduces machine vibration, making it quieter, more comfortable to use, and longer lasting. An example of this type of mower is our DCM Italia 150.

Though a sickle bar mower’s design is a bit antiquated, its advantages are:

• Requires little horsepower. If you have a very low power tractor of 15 horsepower or less, this option will really be your only choice. Though we do carry very small drum mowers, if you have an older compact utility tractor like a Kubota 5000 or 6000 series, a sickle bar mower will be your best bet.

• Lighter weight. If your tractor is very lightweight, or has very little front weight, a sickle bar is the lightest weight hay mower and therefore your best (and safest) option.

• Angled mowing capability. If you are mowing ditch banks, sickle bars are the only hay mower style specifically designed to work well below (or above) horizontal. The DCM Italia mowers even allow you to work in the vertical position for trimming hedges or trail edges.

• Less motion=less dust. While disc and drum mowers create a vortex of moving air across the blades, sickle bars have relatively little motion. As a result, less dirt will be cast into the air and your newly cut hay.

That being said, the disadvantages of a sickle bar mower, include:

• Forward speed. A sickle bar mower’s forward speed is much slower than disc and drum mowers. They can mow a wide swath, but maximum speeds are only about half of other designs.

• Clogging. They become easily clogged when working in very dense, lodged, or already cut material. Clogging is also more of a problem when blades begin to get dull.

• Blade repair. When blades become dull, sharpening or replacing them can be time consuming and expensive.

• Repair expense. Damage due to hitting an unknown obstruction can be expensive to fix.

Disc mowers were invented as a logical progression from the sickle bar design. Instead of blades moving back and forth on the cutter bar though, they are mounted on several small discs that rotate at high speeds, mounted on top of the cutter bar. Generally there are 2 free-swinging blades bolted to each disc. The discs are driven either by a shaft or gears that are inside the cutter bar. Like with a sickle bar, the cutter bar essentially slides along the ground, which is what controls the cutting height.

The advantages of a disc mower are:

• No clogging. Disc mowers handle thick and lodged hay with ease.

• High cutting speeds. If you have the horsepower, there is almost no limit to how fast you can drive through the field. Speeds of up to 15 mph or more are feasible, though very few tractors can do this safely.

• Ease of transition. Hydraulic lift allows you to go from working to transport and back again without leaving the tractor seat. This is a time-saving feature when mowing several small fields.

There are some situations, however, when you might want to steer clear of a disc mower.

Their disadvantages are:

• Need for hydraulics. If your tractor does not have hydraulics, you won’t be able to lift the cutter bar vertically to get through gates and other narrow areas. Until recently this one factor kept many people from choosing a disc mower. However, now Galfre offers a 4-disc mower, the Model 165, with a cutting width of 5’-5”, that does not require hydraulics to operate. Galfre is the only manufacturer in the industry that offers this option.

• Weight. You have the horsepower and the hydraulics, but your tractor is lightweight. This can be a safety hazard because of the much heavier cutter bar compared to a sickle bar mower. When the mower is in the vertical transport position it can tip the whole tractor over unexpectedly.

• Expense of repair. If you frequently mow in places where you might hit something solid like a boulder, old fence post, etc. Disc mowers, when damaged, can be extremely expensive to repair.

Drum mowers, though widely used in Europe for 40 years or more, are just recently becoming a popular choice in the US. Drum mowers have a significantly different design from the other two types of mowers. Instead of powering the cutting blades from the cutter bar, the “drums” of a drum mower are powered from a gearbox above. The standard drum mower has two counter-rotating drums. Each drum is essentially a cylinder of 10-14 inches in diameter and length of 15-24 inches, with a large disc attached to the bottom. Depending on the model, either 3 or 4 free-swinging blades are attached to each of these discs. When in operation, the entire drum/disc/blade assembly rotates. This heavy rotating mass creates a great deal of momentum, which helps to power the mower through thick spots in the field. On the bottom of this assembly is a dish which is mounted on ball bearings. This dish does not rotate with the rest of the drum assembly, but rather slides along the ground and can rotate freely in either direction depending on the surface it slides over.

As a drum mower moves through the field, the drums are rotating toward each other, which causes the cut crop to pass between the drums and be dropped in a windrow behind the mower. This windrowing effect eventually must be spread back out with a tedder or rake in order for the hay to dry properly. This has been the major drawback of drum mowers up to this point. Galfre, however, has solved this problem with the patent-pending Black Hole conditioning system. This system ejects the cut hay out the rear of the mower in a spread-out and fluffed manner, allowing the hay to dry where it sits. This potentially saves an additional trip through the field with a rake or tedder and can shorten drying time by up to a day. Amazingly, Galfre’s design accomplishes this feat with absolutely no additional moving parts.

Drum mowers are designed to be very robust, simple machines. They have only a fraction of the parts that either sickle bars or disc mowers require. They also can be run with modest horsepower. Once the drums are up to speed, they do not draw a lot of power from the tractor to keep spinning.

Drum mower advantages are:

• No hydraulic requirement. You do not have to have hydraulics on your tractor. For transport, the drums swing to the rear of the tractor manually.

• Durability. Drum mowers are easily the most rugged of the hay mower types. They rarely sustain damage even from striking an unmovable object. This makes them a great choice for contract cutting in unfamiliar fields or for mowing unruly pastures.

• High ground speeds. A drum mower can be run at even higher speeds than a disc mower, and double the speed of a sickle bar.

• Low power consumption. This feature is important particularly with older utility tractors of modest horsepower.

Drum mower disadvantages are:

• Contour mowing. Because the drums are very heavy, it is not recommended to hang the mower out over a downward slope. Drum mowers also do not pivot enough to effectively follow extreme contours like a sickle bar will.

• Weight. The drum mower’s heavy weight can be detrimental for tractors with light front ends. Drum mowers are very heavy in relation to other mower types of the same width. This can make maneuverability and transport difficult if there is not sufficient weight holding the front wheels of the tractor down.

• Windrowing. Since most drum mowers windrow the cut crop, it will not dry in the field without being spread out or double-raked. However, Galfre drum mowers are the exception to this rule. Their Black Hole conditioning system fluffs and spreads the cut crop for faster drying time.

The following chart summarizes the three mower options and their best uses:

Figure 1.

Visit full Buyer’s Guide by clicking here.


Slightly larger than the subcompact series, these implements will increase productivity while still working on smaller compact tractors.

  • TYM TM234
  • Kubota B series
  • John Deere 2 family

* These are some examples of tractors. For implement compatibility check the product specifications. Call us to ensure that your tractor is a perfect fit: (260)225-3429. We're here to help!

Click thumbnail to view, print, or download a pdf document.

Download free Adobe Acrobat Reader to view and print PDF documents.