Sioux_Industrial_Catalog - page 12

Accessories
Sioux carries an extensive selection of drill accessories,
including hole saws and wire brushes.
See the drill accessory section in this catalog for a
comprehensive listing.
Drill Safety
Chips can cause eye injury.
Drilling creates chips. Proper eye protection must be worn at
all times by tool user and bystanders.
Broken drill bits can cause eye injury.
Proper eye protection must be worn at all times by tool user
and bystanders.
Sudden and unexpected tool movement can cause injury.
Be sure your body position allows you to have control of the
tool at all times. Make sure your footing is secure.
Tools starting unexpectedly can cause injury.
Always remove tool from air supply and activate trigger to
bleed air line before making any adjustments, changing
accessories, or doing any maintenance or service on the tool.
Drill Principles of Operation
An air motor and reduction gearing are used to drive a spindle
/ drill chuck, which holds accessories for drilling, reaming,
tapping, and hole sawing. Motor size (horsepower), gear
ratio, handle style and drive spindle determine the type of tool
needed to handle an application.
Drill Uses
Pneumatic drills may first be thought of for drilling holes in
wood, metal, or plastic. Drills are used in a wide variety of
applications. Each of these applications require the proper tool
with the proper horsepower and speed to get the best results.
Drilling – cutting a hole in material using a fluted bit. Reaming –
opening up or sizing a previously drilled hole or aligning offset
holes. Tapping – cutting threads in a drilled hole to accept
threaded fasteners.
Where Used
Continuous-duty production drilling
For initial tap operations and thread chasing
Wire brushing and deburring
Screwdriving
Hole sawing
General Maintenance
Considerations for Selecting Drills
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?
DRILLS |
SIOUX TOOLS INDUSTRIAL CATALOG
Drill Speed Guide
Drill Speed Guide
Material
Surface
Ft/Min
Size of Hole to be Drilled
1/16 in
1.5 mm
1/8 in
3.0 mm
3/16 in
5.0
1/4 in
6.0 mm
5/16 in
8.0 mm
3/8 in
9.5 mm
7/16 in
11.0 mm
1/2 in
13.0 mm
Recommended Cutting Speed Range (rpm)
Steel Alloy,
300-400 Brinnel
20-30
1250-1800
600-900
400-600
300-450
250-350
200-300
175-250
150-225
Stainless Steel,
Cast Iron, Hard
30-40
1800-2500
900-1200
600-800
450-600
350-500
300-400
250-350
225-300
Steel
Forgings
40-50
2500-3100 1200-1500
800-1000
600-750
500-600
400-500
350-425
300-400
Steel, Tool
Annealed,
.90-1.20 Carbon
50-60
3100-3700 1500-1800
100-1200
750-900
600-700
500-600
425-525
400-450
Steel,
.40-.50 Carbon
70-80
4300-5000 2100-2500 1400-1600 1000-1200
850-1000
700-800
600-700
500-600
Cast Iron,
Medium Hard
70-100
4300-6000 2100-3000 1400-2000 1000-1500
850-1200
700-1000
600-900
500-800
Bronze,
High Tensile
Strength
70-150
4300-9000 2100-4500 1400-3000 1000-2300
850-1200
700-1530
600-1300
500-1200
Malleable
Iron
80-90
5000-5500 2500-2800 1600-1800 1200-1400
950-1100
800-900
700-800
600-700
Steel, Mild
.20-.30 Carbon
80-110
5000-6700 2500-3400 1600-2300 1200-1700
950-1350
800-1150
700-1000
600-850
Cast Iron,
Soft Plastic
100-150
6000-9000 3000-4500 2000-3000 1500-2300 1200-1800 1000-1530
900-1300
800-1200
Aluminum,
Brass, Bronze
200-300 12,000-18,000 6000-9000 4000-6000 3000-4500 2400-3700 2000-3000 1700-2600 1500-2300
Magnesium
250-400 15,500-25,000 7500-12,000 5000-8200 3800-6100 3000-4900 2500-4000 2200-3500 1900-3000
Fiberglass,
Wood
300-400 18,000-25,000 9000-12,000 6000-8200 4600-6100 3700-4900 3000-4000 2600-3500 2300-3000
Actual drilling or cutting RPM will be approximately 80% of rated spindle speed of tool. Surface Feet Per Minute = .26 x RPM x Drill Diameter in Inches.
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