paddy thresher

1. WELCOME
1

2. PADDY THRESHER
• The thresher is consisting of feeding chute,
threshing cylinder, blower, straw outlet and grain
outlet.
• The body is made of high quality steel and sheets
to withstand maximum wear and tear.
• The feeding system is chute type and the power is
transmitted from the prime mover to threshing
cylinder though belt and pulleys.

3. Technical specifications:
• Overall dimensions (in m) : L – 1.6 , W -1.58 , Height
-1.65
• Weight - 250 kg
• Engine power requirement - 5 hp Diesel Engine or
Electric Motor
• Thresher cylinder Speed (rpm) - 510
• Cleaning system – Blower
• Feeder capacity - 900 kg /hr (789 kg / lit)

4. • Grain output - 444 kg /hr (370 kg / lit)
• Thresher efficiency (%): 96.5 - 96.8
• Cleaning efficiency (89.06%)
• Broken grain proportion (0.632%)
• Spilled grain proportion (0.283%)
• Blown grain proportion (0.395)
• Unthreshed grain proportion (1.627%).

5. Salient features:
• It can thresh paddy without chopping the straw of
the moist crop
• Low cost and high power threshing machine
• The straw, chaff, grains are separated and thrown
separately thus reducing drudgery.
• The device is easy to install and maintain.
• It does not chop the straw and hence we get it in
full length.

7. SUNFLOWER THRESHER
• It consists of a threshing cylinder, concave, casing
fitted with louvers, cleaning system, feeding hopper
and frame.
• The cylinder concave clearance is 40 mm and is
uniform throughout its length.
• The diameter of cylinder is 65 cm and length 150
cm.

8. • The opening of top sieve is 16 mm and of lower
sieve 6 mm.
• Recommended cylinder and blower speeds are
300-350 rpm and 1200-1400 rpm respectively.
• A tractor or 7.5 hp motor can operate machine.
• The machine has a capacity of 600-900 kg/h of
clean grain.
• Breakage rate: less than 0.1%
• Threshing rate: More than 99.9%

9. PAU axial flow sunflower thresher

10. Specifications:

14. MAIZE DEHUSKER-CUM SHELLER
• In this pegs are staggered at varying heights for
better shelling efficiency.
• The spikes are placed in 6 rows with 6 spikes in
each row.
• The sieves have 1.25 cm diameter opening to
separate the shelled maize from husk.

16. Specifications:
• Length(m) :-1.76
• Width (m) :-1.06
• Height (m):- 1.57
• Dia. of threshing cylinder (m):- 0.48
• Length of threshing cylinder (m):- 0.33
• Cylinder speed (m/s):- 16.4
• Type of threshing drum:- Spike tooth
• Type of blower:- Centrifugal

17. • No of sieves:- 2
• Opening size of upper sieve (mm):-12
• Opening size of lower sieve (mm):- 2
• Concave clearance (mm):- 50
• Opening size of concave (mm):-5 x 5
• Moisture content of cobs (%):- 12-28
• Threshing Capacity(kg/h):- 450-650
• Power requirement(hp/kW) :- 35/26.25

20. The thresher is divided into three main sections:
a) The feed in unit.
b) The cutting & threshing unit.
c) The grain separation chamber.
Overall Dimensions:
L – 3.9m, W – 1.09 m, H -2-3.2m
Gear Box: - Five Cylinders
Threshing Drums :– 3

21. Threshing capacity:
• Wheat – 18 to 25 quintals
• Gram – 14 to 18 quintals
• Barley – 25 to 30 quintals
• maize -18 to 22 quintals
• Soyabeen -15 to 20 quintals
• Groundnut – 20 to 22 quintals
• Corn – 8 to 10 quintals.

22. • Average threshing efficiency:-99.60%,
• cleaning efficiency:-99.07 %
• Grain damage:-0.25%,
• Grain blown:-0.36%,
• spilled grain:-0.30 %
• Total loss :- 0.91%

28. Effect of grain moisture and cylinder speed on threshing efficiency, cleaning
efficiency and grain loss (a: Grain moisture 13.5 %, b: Grain moisture 16 %.)

29. Effect of grain moisture and feed rate on threshing efficiency, cleaning
efficiency and grain loss (a: Grain moisture 13.5%, b: Grain moisture 16 %.)