The inertial cap tightener has a fractional horsepower motor that is suspended above the capping area and a flexible shaft that is attached to the chuck.
The motor rotates the chuck to a speed of about 1700 R.P.M. The operator quickly presses the chuck against the cap, the rubber liner grips and rotates the cap.
At the time the liner grips the cap, there is no drive power from the motor to the chuck. However, the high speed rotation and weight of the chuck have a large amount of inertial force. This force is transferred to the cap at the moment when the chuck contacts the cap.
The force will tighten the cap, normally 1-1/2 rotations, and stop. Because the rotation speed is so high, it will seem to stop at contact. Because the rotation stops when the cap is tight, there is no pressure on the operator's wrist.
To adjust the amount of torque, weights are added to or removed from the chuck.
ADVANTAGES:
Because rotation stops when the cap is tight, there is no force on the operator's wrist.
Models are available for operation in 110-120 and 220-240 volt, 50 or 60 hz, 1 phase
electrics.
Explosion Proof models are also available.
DISADVANTAGES
Because there is not a constant drive on the chuck, the cap must have a smooth rotation
during tightening.
Torque is set by adding and removing weights rather than a settable gauge.
The operator must take more care when pressing the chuck against the cap. Incorrect
operation will cause incomplete tightening.
They are not well suited to metal caps on metal containers because of the high friction
through the complete tightening.
RECOMMENDED USE
Inertial cap tighteners are excellent for closing plastic caps on glass bottles, and plastic caps
on plastic bottles with smooth necks.
They work well on caps with diameters less than 60 mm, without lugs on the side.
The ECT cap tightener has a fractional horsepower motor that is in the hand piece.
The motor begins to rotate when the chuck is pressed against the cap. The the rubber liner grips and rotates the cap until the torque reaches the set force on the clutch, then the clutch releases.
When the cap is tight, the operator removes the chuck from the cap.
To adjust the amount of torque, the clutch is adjusted.
ADVANTAGES:
It is the easiest tightener to use.
When the chuck is in contact with the cap, there is force from the
motor applied to the cap.
It has a gauge torque setting.
DISADVANTAGES
Only one model is available, for use with 110-120 volt, 50-60 hz, 1 phase
electrics.
It is suitable, in most cases, for caps to only 40 mm.
It is not available in an explosion proof model.
When the cap is tight, there is force transferred to the operator's wrist until he
lifts the chuck from the cap.
RECOMMENDED USE
The ECT cap tighteners are excellent for closing nearly all types of caps on all
types of containers.
They work well on caps with diameters 40 mm and smaller.
The PCT cap tightener uses an air motor to develop torque.
The chuck begins to rotate when the chuck is pressed on the cap and the lever is pressed to start the air motor. The the rubber liner grips and rotates the cap until the force of the air motor can no longer rotate the chuck.
When the cap is tight, the operator releases the lever and removes the chuck from the cap.
To adjust the amount of torque, the air flow and air pressure can be adjusted.
ADVANTAGES:
It is Explosion Proof.
When the chuck is in contact with the cap, there is force from the
motor applied to the cap.
It has a gauge torque setting.
It can close larger caps than the other models and produce a higher
torque.
DISADVANTAGES
When the cap is tight, there is force transferred to the operator's wrist until he
releases the lever on the tightener.
RECOMMENDED USE
They are recommended for explosion proof environments if the containers are
metal with metal caps, or plastic containers with necks that are not smooth.
The PCT cap tighteners are also recommended for caps above 40 mm diameter.
They are recommended if the torque requirements are above 25 inch pounds.
LARGER CAPS: If the caps are larger than 65 mm diameter, the table top (CITT) models are
recommended.
GREATER TORQUE: If a torque requirement is greater than 35 inch-pounds, the table top
(CITT) cappers should be used.
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