Air & Mechanical Clutches
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All Twin Disc products are backed by an extensive worldwide parts and service organization to protect you from unnecessary downtime and loss of production.  Mill Log maintains strategically located parts stocks in our five locations throughout the Pacific Northwest and western Canada.

Air clutches have the further advantage of being easily remote controlled.   They can be readily tied into the machine cycle with push button control, automatic actuation through limit switches, or other devices of this nature.  Control valves are of two general types.  When sudden rapid engagement is permissible, a simple "on-off" valve can be used.  Where smooth engagement or partial torques are required, a controlled pressure valve is selected.  The pressure admitted through this type is proportional to the throw of the control lever.

Mechanically-Actuated Clutches
Mechanically-actuated clutches require adjustment for wear on the friction plates.  Twin Disc Mechanically-Actuated Clutches are easily adjusted with a simple single-point feature.  Wear is a function of the energy of clutch engagement so no simple rule can be set as to how often adjustment is necessary.  However, under average cut-off conditions, usually several thousand engagements can be made before take-up is required.

The torque of a mechanically-actuated clutch is of course proportional to the degree of adjustment.  Values set forth for Twin Disc clutches are torques that can be obtained with reasonable manual effort.  Higher torques are possible with hydraulic or air cylinders, but such applications are not normally encouraged unless the installation is such that only low horsepower is required.

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