All pneumatic tools should be run at 90 P.S.I. gauged at the tool with the tool running.  

CFM ratings vary as horsepower increases or decreases, for example, .3hp=16 CFM; .6hp=30 CFM; .9hp=38CFM.

Dry filtered air is desired. Air with moisture in it will cause tools with blades / vanes to swell.

Yes, all pneumatic assembly tools do require airline lubricant.

Ask yourself these questions in order to make a proper selection.
What type of material is being drilled?
What size of hole will need to be drilled?
What are your horsepower requirements?
What speed requirements do you have?

The word torque comes from the Latin word torquere, which means “to twist.” It’s a good choice of words, because it’s the twisting or turning force applied to the nut or bolt that we call torque.

Torque is defined as the force you apply times the distance between the point of application and the axis around which you turning Torque = force x distance.

Torque is commonly measured in foot-pounds or inch pounds. In the metric system it’s measured in Newton meters, the Newton being the standard force in the metric system.

It’s useful to distinguish between two types of torque: Dynamic Torque, which is the torque being exerted by a tool, moment by moment, as it tightens a fastener; and Static Torque, which is the torque required to restart a previously tightened fastener.

The torque range varies based on the tool product line and series. (Tool configurations: straight, right angle and pistol grip). The torque ranges will be from one inch pound up to 5000 foot pounds.  

Shut-off style tools, inline or pistol grip are adjusted externally by simply rotating the clutch mechanism clockwise to increase torque and counter clock wise to decrease torque. Non-clutch tools such as stall types are adjusted by air pressure only.

Ask yourself these questions in order to make a proper selection.
What is being assembled?
What material is involved?
What type of screw or nut is being driven? What head type?
What screw size (standard or metric)?
What U.S. grade or metric class?
What torque (inch pounds or Newton meters)?
What torque tolerance (accuracy)?
What is the run-down torque vs. seating torque?
What type of joint pull-up (hard, medium, soft)?
What pull-up conditions (free run-down, sheet metal, wood, or plastic)?
What is the production rate?
Are there clearance problems?
What handle style is required (straight or pistol)?
Is the tool to be hand held or fixtured?
What type of clutch?
Speed required?
Is there a need for a reversible tool?
What type of drive (square, 1/4″ hex, quick change)?
How is the application being done now?
Special consideration?

Clutch options are as follows:
Direct/Stall Clutch – Final torque equals stall torque of motor/gearing.
Simple, low-maintenance design.

Positive Clutch – Simplest screwdriver clutch.
Torque builds up in fastener if the operator allows clutch to continue to impact, No adjustment of clutch is required.

Adjustable Clutch – Tool ratchets on fastener, causing additional torque build-up. Dependable general-purpose clutch.

Torque Control – High torque accuracy.
Conserves air due to automatic shut-off.
Quick fastener run-down.

In order to select the correct tool for an application, it is necessary to know what the job is…
Screw, bolt, or nut size
Grade designation
Torque specifications
Accuracy requirements

Check the quality of the collet if a die grinder and the pad if a disc sander.

If lubrication is adequate, your tool may need repair.

You can repair the tool yourself by disassembling and ordering parts from the parts pages included in the original box or view service centers here.

Make sure of lubrication, if adequate your tool may need repair.

Also check the air supply for 90 PSI and adequate SCFM.

Sioux offers a 1-year conditional warranty. Parts and workmanship are covered, however, wear and abuse are not.

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SIOUX TOOLS INC.   Quick Links

250 Snap-on Drive | P.O. Box 1596 | Murphy, North Carolina USA 28906
PH: 828.835.9765 | FAX: 828.835.9685 | TOLL FREE: 866.259.7291 | TOLL FREE FAX: 800.722.7236