Air Automation Engineering
Clutch Selection Chart

Air Screwdrivers & Nutrunners Print this page
Types of Joints
  Free Running-Slam
(Hard Drive)		 Compressing Gaskets
(Soft Draw)		 Self-Tapping Screws Sheet Metal Screws Wood Screws
Select the Clutch to Fit
Your Job		 Free Running-Slam (Hard Drive)
Resistance low at start and during rundown but peaks suddenly as bolt
head seats.		 Compressing Gaskets (Soft Draw)
Turning resistance gradually increases as squeeze progresses to final turn.

Self-Tapping Screws
Initial resistance high through tapping travel, easing off until sudden (B) or gradual (A) stop.

 

 Sheet Metal Screws
Starting torque builds until penetration made, then resistance slacks off until head seats.

 

 Wood Screws
Low resistance at start builds gradually through entire rundown until head seats.
Adjustable Precision Shut-Off Clutch EXCELLENT for all screw sizes where precise torque control is required. BEST for all screw sizes where precise torque control is required.

BEST for all screw sizes except where tapping torque exceeds final torque.

 

 EXCELLENT for all size screws — not suitable if tapping torque exceeds stripping torque. Not recommended.
Adjustable Cushion Clutch VERY GOOD for most screw sizes where torque control is IMPORTANT. VERY GOOD for most screw sizes where torque control is IMPORTANT.

VERY GOOD for all screw sizes where tapping torque does not exceed final torque.

 

 GOOD for most screws where final torque exceeds tapping torque. FAIR for all screw sizes.
Positive Jaw Clutch FAIR for all sizes where close torque control is not required. GOOD for most screws where close torque control is not required.

GOOD where tapping torque greatly exceeds final torque.

 

 VERY GOOD where sheets are not aligned — GOOD where tapping torque is higher than final torque. BEST for all screw sizes.
Stall GOOD for all screw sizes in hands of experienced operators. GOOD for large and medium screws — must be adjusted to run rather slowly for small screws. Not recommended unless stripping torque is considerably higher than tapping torque. Not recommended unless stripping torque is considerably higher than tapping torque. GOOD for large and medium screws — must be adjusted to turn slowly for small screws.
AIR AUTOMATION ENGINEERING
230 Commerce Circle South, P.O. Box 32709, Fridley, MN 55432
(763) 571-4970, (800) 231-9205, Fax (763) 571-4923
Web Site: www.airautomation.com
E-mail: aae@airautomation.com