Rotavator
                     Rotavator
Case Study
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By: Sarah John
Rotavator
Rotavator is a tractor drive rotary tillage implement, It use to plow 
the land by a series of blades that cuts, pulverizes, mixes and level 
the soil in a single pass, rotavator helps to conserve soil moisture 
and pulverizes soil up-to 6 inches of depth. It also called rotary 
tiller, it could be a most economically and effectively be used tool 
for replacement the cultivator, harrow and leveler. Rotavator is 
used as a primary cum secondary tillage implement.
Rotavator Uses
 Rotavator used to prepare the farming land suitable for sowing.
 Tractor Rotavator also use for destroying weeds
 Rotavator is ideal for smooth & speedy preparation for root Mixing fertilizer or 
compost into the soil crops, grain crops, orchards & cash crops.
 Rotary Tiller increases the soil potency by mixing the residue of crops like wheat, 
cotton, sugarcane, and paddy.
 Rotavator saves ours in time & fuel. Lesser wear & tear of the tractor as the soil 
preparation is accomplished in one or two passes.
 It conserves soil moisture & helps water distribution management as tilling can be 
done immediately after harvesting the previous crop
 Tillage depth varies according to the moisture level of the soil.
 Tractor Rotavator use as a primary cum secondary tillage machine.
Types of blade used in rotavator
Different types of blades are used for different field conditions:
A. L-shaped blade: Most common as the shape is superior to others in heavy thrash. They are 
better to kill weeds and generally cause less soil pulverisation.
B. C-shapes blade: Penetrating hard ground is easier with these blades. They are more curved 
than L-shaped blades and are recommended for heavy, wet soils because they have fewer 
tendencies to clog.
C. Long shank blade: They have longer shank than the L-shaped blade and can be used for 
deeper cultivation.
D. Speed blade: Especially suitable for penetrating the hard ground and for mixing heavy 
thrash. Have fewer tendencies to clog in wet condition.
E. Straight knife blade: These simply slice through the soil to aerate and loosen grass, 
eliminate soil compaction and improve moisture penetration. The primary application is for 
lawns, parks and golf courses.
Power transmission in a rotavator
The rotavator takes the power directly from the tractor PTO through a shielded double 
universal joint shaft to the rotor gearbox. The power requirement for the tiller is about 
three times as much as that for the mould board ploughs. Tractors for these units 
should have 40 HP (PTO) per meter width.
The gearbox has a crown wheel and pinion, part of the interchangeable spur gear and 
a rotor engagement clutch alters the rotor speed by transposing or changing the pairs 
of spur gears. Generally, there are two pairs of gears to obtain four rotor speeds. 
Multiple plate clutch is provided before power input to the gearbox. The drive from 
the gearbox is then transmitted to the rotor shaft. Depending on the machine design 
and the operating width, the drive may be either from the center or offset. Drive from 
the center reduces the number of components as the power is transmitted via directly 
from the PTO shaft through the gearbox to the rotor shaft while in the offset drive the 
power from the gearbox is transmitted via a transverse shaft to gears or sprockets & 
finally to the rotor shaft.
Application of rotavator
1. Chopping and mixing: Rotavator with its chopping and mixing ability is ideal for 
crops such as maize, sorghum, tobacco, sugarcane, cotton, rice etc. The thrash mixed 
evenly throughout the soil adds valuable humus to the land.
2. Tilling and Planting: To reduce further operations, many rotavators may be equipped 
with a toolbar mounted planter or a hitch for towing a planter for tillage and planting 
operations. By rearranging blades on the rotor shaft, the rotavator may be used for strip 
tillage in the seedbed.
3. Fertilizer and chemicals: may be incorporated by spreading in bands or broadcast 
from tanks or hopper on the tractor or rotavator by broadcasting ahead of the implement. 
The stirring, mixing action of the rotavator provides excellent incorporation of pre-
emergent chemicals.
4. Cultivating: By rearranging the blade flanges on the rotor shaft, most tillers may be 
used for row crop cultivation. Rotor diameter and operating depth are limiting factors in 
the size of plants that may safely be cultivated in this manner.
Application of rotavator
5. Orchard Tilling: Rotavators are used in vineyards, citrus groves and orchards because 
it is easy to control operating depth to prevent damage to trees or vine roots. They 
provide sufficient mulch to conserve moisture. Some rotavator models are built for offset 
operations. The offset permits working under trees.
6. Rice field: Rotavators are adapted to work in wet rice fields. The rotating blades help 
push the tractor forward and reduce wheel slippage, where it would be difficult to gain 
traction for plough and disc operations. Heavy rice straw may be chopped and mixed with 
the soil to improve fertility and soil structure.
7. Weed control: As many as 3-5 passes at 2-3 weeks interval may be required to 
completely eradicate annual and. perennial weeds. Operate the rotavator with a fast rotor 
speed and the shield raised so that the roots are thrown on the surface to die.
8. Pasture renovation: Pasture renovation with a rotary tiller involves breaking up and 
kills the sod, mixing residues in the soil, incorporation of fertilizers and herbicides. 
Levelling of the surface and preparation of seedbed.
Types of Rotavator
There are many types of rotavator available in the market as per the different size and 
different soil conditions-
 Robust Series
 Regular series rotavator
 Hobby Series rotavator
 Mini-Series Rotavator
 Beroni Series Rotavator
 Side Shifting Rotary Tiller
 Stick Shift Rotary Tiller
Parts of rotavator
 Rotavator Blades.
 Rotavator Side Plates.
 Rotavator Yoke.
 PTO Shafts.
 Rotavator Gear.
 Side Gear.
 Tractor Spare Parts.
 Tiller Blades.
Rotavator Market is Booming Worldwide
Article Source
http://chirkutidea.com/rotavator/
https
://www.fieldking.com/product-portfolio/rotary-tiller/robust-series/robust-multi-sp
eed
/
http://onlystudybyte.com/rotavator-overview/
Thanks