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1/4 In. to 7/8 In. High-Speed Steel Step Drill Bit
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SDH4
The Bosch line of step drills offers 13 different hole sizes with a single bit. The step drill bits are ideal for electrical, plumbing and HVAC contractors. Typical step drill bit applications include electrical knockouts, running conduit, drawbolt holes, faucet installations, auto body work, running freon lines, edge boring steel and hollow doors.
Benefits
Self-starting point starts on contact
Balance double flute eliminates chatter and vibration
Resharpenable cutting edge provides longer tool life
Three-flat shank for reduced slippage
For use with all common drilling needs
Drills clean, accurate holes in these thin materials (up to 1/8 In.): sheet metal, ducts, steel, copper, brass, aluminum, plastic, plexiglass, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel and cast iron
Technical Data
| *Note | Drill bits (or extension + drill bit) in excess of 8" should never exceed 600 RPM |
| Application | For 1/2" and 3/4" conduit |
| Diameter inch | 1/4", 7/8", 1-1/8" |
| Flute Length in | 2.0 |
| Length in | 3.0" |
| Notes | For 1/2" and 3/4" conduit |
| Number of Hole Sizes | 3.0 |
| Pack Quantity | 1 |
| Shank Diameter in | 0.375 |
| Step Depth | 5/32" |
| Step Height in | N/A |
SDH4
SDH4
SDH1
SDH10
SDH11
SDH2
SDH3
SDH5
SDH6
SDH7
SDH8
SDH9
Other sizes
SDH1
Diameter inch
1/8" to 1/2"
Step Height in
1/32"
Step Depth
1/8"
Number of Hole Sizes
13
Shank Diameter in
0.25
SDH10
Diameter inch
1/4" to 1-3/8"
Step Height in
1/8"
Step Depth
1/8"
Number of Hole Sizes
10
Shank Diameter in
0.375
SDH11
Diameter inch
1-1/8"
Step Height in
N/A
Step Depth
N/A
Shank Diameter in
0.5
SDH2
Diameter inch
3/16" to 7/8"
Step Height in
1/16"
Step Depth
1/8"
Number of Hole Sizes
12
Shank Diameter in
0.375
SDH3
Diameter inch
1/4" to 3/4"
Step Height in
1/16"
Step Depth
1/8"
Number of Hole Sizes
9
Shank Diameter in
0.375
SDH5
Diameter inch
7/8"
Step Height in
N/A
Step Depth
N/A
Number of Hole Sizes
1
Shank Diameter in
0.375
SDH6
Diameter inch
3/16" to 1/2"
Step Height in
1/16"
Step Depth
3/8"
Number of Hole Sizes
6
Shank Diameter in
0.25
SDH7
Diameter inch
9/16" to 1"
Step Height in
1/16"
Step Depth
1/8"
Number of Hole Sizes
8
Shank Diameter in
0.375
SDH8
Diameter inch
1/2"
Step Height in
N/A
Step Depth
N/A
Number of Hole Sizes
1
Shank Diameter in
0.25
SDH9
Diameter inch
13/16" to 1-3/8"
Step Height in
1/16"
Step Depth
1/8"
Number of Hole Sizes
10
Shank Diameter in
0.5