Air shaft clutch is linked with air pressure, released by return springs. Disc relies on air pressure to slide along the direction of the axis, contacting the friction plate. Disc, friction plate and so on, are assembling to the wheel to come into an integrated structure. 

There are two types of air clutches: friction type and tooth type. The NAC, NMC, BDC, HBDC, BDCV models are friction type, BTC, HTP, HTC, HBS models are tooth type. Working thoery of these two types of air pneumatic clutch is a little different. NAC model air shaft clutch is linked with air pressure, released by return springs. Disc relies on air pressure to slide along the direction of the axis, contacting the friction plate. Disc, friction plate and so on, are assembling to the wheel to come into an integrated structure. 

The air pneumatic clutch installation is very easy, but there are some points should be pay more attention to you for good usage effect and prolong products' working life. Following are the detail installation instruction for your reference:

1. Precaution to install clutch
When install clutch onto shaft or install V-blet pulley, chain wheel onto rotating disc, please don’t hit clutch excessively. The gap between disc and friction plate should be between 0.5~ 0.8 mm. 
2. Connect rotation
Air chamber and piston will be caused connect rotation by bearing, equipped air pressure pipe(oil pressure rubber hose) with joint can prevent it happening.
3. Bearing lubrication  
The trust ball bearing should be lubricated periodically. The period is between 1 to 6 months according to using occasion. Because the other bearings are sealed, there is no need to supply.  
4. Avoid high load working 
It is better to use double or triple safety factors when choose model, overload usage will reduce clutch service life. When usage frequency exceed 2-3 times per minute, we suggest use larger safety factor, the allowable maximum usage frequency is 6 times per minute.
5. Installation size
Try to make sure the distance between axial center part of V-belt pulley or chain wheel and end face is during allowable range a.When install clutch onto shaft end, the minimum length of shaft which inserted into inner surface of hub is as below chart.

These clutches can be installed according to your actual working situation. There are two kinds of installation example for your reference.
One is on the central shaft, the other is on the end of shaft.

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