Single-punch tablet press “SP-02”
Maximum compression force: 40 KN (4000 kg/cm3)
Maximum tablet diameter: 50 mm
Minimum tablet diameter: 5 mm
Height of finished tablets: up to 25 mm
Maximum filling depth of the matrix: 40 mm
Tablet press capacity:
3600 tablets per hour , diameter from 5 to 20 mm
2000 tablets per hour, diameter from 20 to 50 mm
Electric motor: 1.5 kW, 1400 rpm, 220V or 380V
Overall dimensions: 800mm x 950mm x 700mm
Tablet press weight: 120 kg
Weight with packaging: 160 kg

This model of tablet press is developed and produced for a long time by MINIPRESS. After many modifications it is one of the most popular, reliable and versatile models we recommend to our customers. To service this press you will need a set of wrenches: hex keys #10,8,6 and two horn wrenches #17 and 19. Single-punch tablet press SP-02 is a single punch, crank eccentric press. The principle of its operation is quite simple: a pulley is attached to the shaft of the electric motor. The rotation is transmitted via a belt drive to a large flywheel, on the shaft of which a small bronze gear is mounted. From the bronze gear, the rotation is transmitted to a large gear, on the shaft of which is dressed directly eccentric itself. It drives the upper punch and creates the necessary pressing force. The frame of the tablet press has a stand for the electric motor, fixed with two screws. The belts can be tensioned by loosening the motor mounting screws due to the slots in the stand. The tablet press and the stand have height-adjustable feet, which help to stabilize the press. It is not recommended to tighten the straps too much, their function is to unwind the large flywheel, not to apply direct pressure. The flywheel, spinning like an eccentric, transmits rotation with centrifugal force to the axle and then to the gears. The handwheel is equipped with a removable handle, which can be inserted into a special hole for debugging work. After adjusting the pressure in manual mode, this handle must be removed to avoid injury when the motor is switched on. Powder feeding system: a large hopper is fixed on the press bed, from which a flexible corrugated hose goes directly to the foot, which feeds the powder into the pressing zone. We use a corrugated hose rather than a smooth-surfaced hose in order to create additional movement and avoid powder sticking. You can use any hose you see fit. The large gear has a contoured groove in which the roller of the part that drives the hopper foot moves. Through the base of the press bed is the bottom punch holder. Part of the punch is located in the matrix, which ensures its positioning. The upper punch is located in the pusher rod, where there is a part with a thread, by changing the position of which relative to the eccentric, dressed on the gear shaft, the depth of powder pressing by the upper punch is regulated. The kinematic scheme of the press is as follows: the electric motor, through the transmission belts, unwinds the flywheel, whose rotation is transmitted to the shaft, a small brass gear, a large steel gear, on the shaft of which is dressed eccentric with a sleeve and adjusting screw in it, and, directly, the pressing force is transferred to the upper punch holder. During the pressing process, the upper punch enters the die, which is fixedly attached to the platen, which can be moved in all directions during the adjustment process to center the upper punch with the hole in the die. The tablet press is also equipped with a system for adjusting the die and the lower punch, which makes it possible to vary the depth of lowering of the lower punch within the die, and thus to produce tablets of different weights and thicknesses. The weight of the tablet is regulated by the position of the lower punch inside the die, and the pressing force is regulated by changing the position of the upper punch holder and adjusting the depth of its sinking into the die. Inside the eccentric of the press there is a bronze sleeve in which a screw with a large thread pitch is screwed in and ends with a ball-shaped head, which is installed in the pusher and provides mobility. By adjusting the position of this screw, the depth of plunge of the upper punch into the die can be adjusted. The bronze bushing has a longitudinal cut and a transverse groove through which passes a bolt fixing the bushing in the eccentric. When tightening the edges of the housing by the locking bolt, the bushing screw is crimped and secured against turning. The essence of operation of this unit is that when adjusting in manual mode, the bushing fixing bolt is loosened and the screw is allowed to undergo adjustment. Having reached the required value when making a trial batch of tablets it is necessary to fix the screw of the bushing by crimping the fixing bolt. Bronze bushings are pressed inside all parts of the press, of which the shaft is a part. The press does not include bearings and the eccentric is seated only on bronze bushings, which ensures maximum durability of the equipment. All parts of the tablet press in contact with powder – table with fixed die, upper and lower punches, upper hopper – are made of food-grade stainless steel and have a certain hardening (dies – 50 units, punches – 65 units), which meets all the standards required for the production of tablets. The Single-punch tablet press SP-02 pill mill is equipped with an operator’s protection against injuries.