Technology/Process Description:

McKINNON offers a wide range of machinery for both wet and dry processing of coffee in processing units on both estates and at the plains. McKINNON equipment are designed and built, with uncompromising quality, by engineers and plantation managers with practical experience, so that the equipment ensures that the coffee is well processed, without damage and retains its inherent characteristics and flavor.

Wet Processing System:

Wet  Processing System  




1. Cherry Accrual

6. Cherry Feeder

11. Sump Tank For Water Collection / Recirculation

16. Collection Points For Transfer

2. Sorting Unripe Area

7. 4 Disc Pulper

12. Colmena Pump

17. Pulp House Drive

3. Reception Area

8. Aagaard Pregrader

13. Skin Separator Tank

18. Pump Drive

4. Weighing Area

9. Two Disc Repasser Pulper

14. Mucilage Remover / Washing Channels

19. Weigh Area Roof

5. Cherry Hopper / Siphon Tank

10. Fermentation Tanks

15. Soak / wash / Draining Tanks

20. Pulp House Roof


Dry Processing System:

Dry Processing System - Feeding - Cleaning Dry Processing System - Huling - Polishing Dry Processing System - Grading - Grabling Dry Processing System - Storage - packing


1. Feed Hopper

5. Africa Huller

 9. Cylindrical Grader

13. Picking Table

2. Precleaner

6. Unhulled Separator

10. Densimetric Table

14. Bagging

3. Aspiration Channel

7. Smout Peeler Polisher

11. Storage Bin

15. Fan

4. Destoner

8. Dustless Catador 

12. Colour Sorter

16. Cyclone


Technology/Product Specifications:

Machinery & Equipment used in Coffee Processing Plant are:

GREEN BEEN SEPARATOR:  This machine is used to segregate unriped greens from full matured ripe coffee berries. Manual and Automated sorting can be done using this machine. It is based on wet processing system.

Green Bean Separator

Green Been Separator


Power in H.P.

Capacity Per Hour in Kgs.

7.5 HP

400 - 500 Kg / Hr


DISC PULPERS: Disc Pulpers are used in wet processing plants to pulp ripe coffee fruit to parchment. The coffee is fed from large fruit tanks and the wet parchment is discharged into fermentation and washing tanks. The fruit skin is discharged into a pit for water recovery and recirculation.

The pulping operation takes place between the rubbing action of the bulbs on the disc and the lateral pulping bars called chop rails. The gap between the surface of the bulb and the chop rail can be adjusted to allow for any clearance that may be required according to the variety and size of coffee fruit processed. The hopper is fitted with a feed mechanism which ensures even feeding of the fruit to the disc surface.     

McKINNON Disc Pulpers

                                                                                                                                                                Disc Pulper



1 Discs

2 Discs

3 Discs

4 Discs

Capacity Per Hour in Kgs.

900 to 1000

1700 to 2000

2800 to 3000

3700 to 4000

Power required in H.P.






AAGAARD SYSTEM: Aagaard Wet Processing System has been designed to produce a uniform quality of First Parchment and for total pulping of the intake fruits. The system consists of the following equipments:

Rotary Cherry Feeder to ensure even feeding of the cherry to the various disc surfaces for pulping. Cherry Feeders consist of a device to intake fruit from the fruit tank, a device to destone the fruit and to evenly spread the fruits. This feeding system is not dependent on water and hence less water is needed in the pulping process. 

A Primary Disc Pulper can be Two, Three or Four Disc type depending on the capacities required. These Pulpers are fitted with small type hoppers. The flexible Chop Rail option ensures that a wider range of fruit sizes is pulped with reduced nip damage. Sixteen nylon fingers, backed by a flat piece of rubber with a tension adjusting screw, ensure this flexibility.

A regulating door ensures that the feed can be varied from 800 kgs. to 4000 kgs. per hour.

McKINNON Aagaard System

Aagaard System



Power in H.P.

Capacity Per Hours In Kgs.

2 Disc Pulper


1700 to 2000

3 Disc Pulper


2700 to 3000

4 Disc Pulper


3700 to 4000


MINI WET PULPING PLANT: Mini Wet Pulping Plant caters to small growers who process upto 800 kgs of ripe cherry fruit input in an hour. The plant is capable of both pulping and washing. The plant is mounted on a steel frame and can be made into a mobile unit.

McKINNON Mini Wet Pulping Plant 



Power in H.P.

Capacity Per Hour in Kgs.





COFFEE PRECLEANERS:  Coffee Precleaners are designed to clean and screen coffee, prior to feeding on to the next processing stage. The machine effectively removes iron particles, stones, sand, rubble, leaves, twigs and other unwanted matter. Separation is achieved by a series of screens, the first screen removing large impurities and the bottom screen removing fine materials such as sand and dust. The middle screen separates the coffee and delivers it clean. To increase the efficiency of cleaning, an Air Sifter is used after the precleaning

The machine requires minimum maintenance and has individual rubber ball cleaning mechanisms to ensure that the screens have maximum screening area at all times. The screen inclination, throw angle and amplitude can be varied, depending on the input product for ideal results. Vibratory motion of the screen is effected by means of two low power vibratory motors.

McKINNON Coffee Precleaners

Coffee Precleaner







Capacity Per Hour in Kgs.

800 to 1000

800 to 1000

1500 to 2000

Power required in H.P.

2 x 0.75

2 x 0.75+

2 x 0.75+

( 1.5 )

4.0 +0.75

4.0 +0.75


( 6.25 )

( 6.25 )



SMOUT PEELER POLISHER: Smout Peeler Polishers are specially designed for treatment of dry parchment coffee. When fitted with phosphor bronze cone and liners, they provide a fine polish and color to the coffee. The machines can be used for peeling and polishing or for only polishing to remove the silver skin. Since the Smout performs both peeling and polishing operations simultaneously, there is no necessity for passing the parchment through a huller prior to polishing. This saves considerable energy and also from damage to the coffee.

McKINNON Smout Peeler Polishers










Capacity Per Hour in Kgs.

1800 to 2000

900 to 1000

150 to 200

75 to 100

50 to 75

15 to 25

Power required in H.P.

40.0 + 5.0

20.0 + 3.0

5.0 + 1.0





DRY DESTONERS: Dry Destoners are used for removing stones from green coffee, dry parchment or dry cherry. The Destoner is designed to take advantage of the difference in specific weights between the stones and the coffee. The incoming coffee is fed into an inclined sifting frame fitted with a special screen, which is exposed to a controllable air exhaust. The lighter fraction, consisting of good coffee, forms a fluid layer above the sieve and flows over to the outlet while the heavier stones contacting the screens move upslope by the frame vibration. The sieve frame is vibrated through the use of a vibratory motor.

                                                                The machine has an input feed regulation device and an aspiration throat for connection to a central aspiration line or to an individual aspiration line with fan, cyclone, airlocks and piping. The vacuum above the sieve can be adjusted by a butterfly control valve and read on a water gauge tube. Depending upon the input material characteristics, the feed, aspiration intensity, screen inclination, throw angle setting and vibration amplitude can be adjusted for optimum results.

McKINNON Dry Destoners






Capacity of Green Coffee/Parchment

1000 to 1200

2200 to 2400

Capacity of Cherry

800 to 1000

1800 to 2000

Power required in H.P.




MINI DRY PROCESSING PLANT: Mini Dry Processing Plant has been designed to cater to small processors who process up to 2000kgs. of green coffee output per day. It is capable of cleaning, hulling and grading dry cherry, dry parchment or green coffee. The plant is mounted on steel frame and can be made into a mobile unit. Catadors are used after Hullers and Smout Peeler Polishers to remove husk and light coffee. They are also used after grading for secondary catadoring of light beans and triage.

The coffee is fed into an air current where separation is carried out by density differences and the light matter is carried up and exited via the lights outlet. The heavy beans fall on a wire screen and exit through the front of the machine. The machine is equipped with an electric motor platform and a shaft extension to suit Electric motor drive or can be supplied to suit a Diesel Engine drive.           

McKINNON Mini Wet Pulping Plant


Power in H.P.

Capacity Per Hour in Kgs.




Company Profile

Company Name

Mckinnon India Pvt. Ltd.


25,Mettupalayam Road, Narashimanaickenpalayam,

Coimbatore-641031,Tamil Nadu, India

Contact person

Mr. D. Basu






Web Site

Year of Establishment


Product(s) Manufactured

Coffee Processing Machinery-Pulpers for wet processing of coffee and precleaners,  Hullers & Peeler Polishers, Gravity Separators for Dry processing

Sales Turnover

FY 05:  USD 0.4 Mn

FY 04:  USD 0.3 Mn

FY 03:  USD 0.22 Mn

Conformity to Standards


Compliance to ISO

ISO 9001

Foreign Collaboration

Wm. Mckinnon & Co. Ltd. (UK)

Manpower Total (Nos.)


Raw Materials / Equipment used

Cast Iron , Steel, Nylon, Phosper Bronza, Lathe,Drilling Machine, Grinding Machine, Welding Machine

Effluent Generated

Non Polluting


Broad Profile of Project Offer



To Manufacture & Supply  Coffee Processing Plant

Capacity per Annum

50 Plants; Typical Capacity of Plant : 1 t/hr.

Land Requirements/ Building Requirements

 8000 Sq. M

Plant & Machinery and Test Equipment

Lathe,Drilling Machine, Grinding Machine, Welding Machine

Electrical Installation

250 KVA

Implementation Period

6 Months

Manpower Required


Raw Materials / Equipment Required

Cast Iron , Steel, Nylon, Phosper Bronza, Lathe,Drilling Machine, Grinding Machine, Welding Machine

Total Project Cost

USD 0.2 Mn (Cost of putting up facility for  50 plants/annum)

Expected Annual Sales

USD 0.45 Mn



Form of Offer

 Turnkey Project



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