Sioux_Industrial_Catalog - page 25

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?
Considerations for Selecting Screwdrivers
This should be done in a systematic way to ensure no details are overlooked that could have an adverse affect on job function or
results. The following are variables that must be considered to ensure proper tool selection.
What is the size and type of screw or fastener on which the tool will be used?
No 1 Series Tools –
2 to 50 in lb of torque. (Fasteners up to 1/4")
.6 & 1 HP Signature Series Tools –
5 to 400 in lbs of torque. (Fasteners up to 3/8")
No 3 Series Tools –
5 to 50 ft lbs of torque. (Fasteners up to 1/2")
What kind of application and material will the fastener be used on?
The type of material helps to determine which type of clutch is needed.
Tool Selection Guide
Application & Material Guide
Screw Size
Clutch
Free Run Down
Soft Pull-Up
Prevailing Torque
No 8 and Smaller
Adjustable
Excellent
Excellent
Excellent
Stall
Excellent
Good
Excellent
Direct
Good
Good
Good
Positive
Fair
Fair
Good
No 10 and Larger
Adjustable
Good
Fair
Fair
Stall
Good
Excellent
Excellent
Direct
Good
Excellent
Excellent
Positive “P”
Good
Excellent
Excellent
Positive “PS”
Good
Excellent
Excellent
SIOUX TOOLS INDUSTRIAL CATALOG
| ASSEMBLY
What are the torque requirements?
Most air tools share the quality: as the speed increases, the
torque decreases. This applies to tools within the same
horsepower rating.
A.
Stall or direct clutch gives the most torque.
B.
Positive clutch tools are operator influenced.
C.
Adjustable torque clutches are available on most Sioux
fastening tools.
D.
Torque control is available on No 1
At what angle or position will the tool
be used?
This will determine the style of tool best suited from an
ergonomics point of view.
A.
If the fastener is in a vertical position, a straight or lever style
tool will be best.
B.
If the fastener is in a horizontal position a pistol style tool will
be best.
C.
If the fastener is in a tight or constricted area the “2S” series
works well in this application.
Is reversing necessary?
Most fastening applications are going to require a reversible tool.
Keep in mind that in most cases a non-reversing tool will have
more torque than a reversible tool.
Is the application operator influenced
or restricted?
A.
Is the operator male or female? This can be a factor in
determining the size of the power tool (weight for example).
B.
Does the application lend itself to an auto start tool, as in the
No 1 series?
An example of applying these ques-
tions to an application would be:
Driving a 2" long wood screw into hardwood with a pilot hole. The
fastener is in a horizontal position during assembly. A test with
a hand torque wrench indicates a prevailing torque of 80 in lbs,
and a failing torque of 120 in lbs.
1.
2" long wood screw
4.
Pistol will work best
2.
Hard Wood use positive clutch
5.
Need reversing
3.
SSD10P20PS – 100 in lbs
6.
Mostly male workers
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