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Step Drill Bits
Step drill bits can drill several hole sizes in a single operation. These single-flute bits are specially designed for thin materials, and feature steps of progressively larger diameters.

Step drill bits do not require any pilot holes to be drilled, and can create large burr-free holes in the blink of eye. They can be used to make even larger holes (typically 60mm wide or smaller) in sheet metal, but do require pilot holes. It is common practice to use a self-starting step bit to form the large pilot hole needed for a hole-enlarging step bit.

Item No.
Size
Increment
Allover Length
Step QTY.
Metric (mm)
Metric (mm)
(mm)
MTSPD412A
4 -12mm
2mm
65
5
MTSPD412B
4 -12mm
1mm
65
9
MTSPD420
4 -20mm
2mm
75
9
MTSPD422
4 -22mm
2mm
80
10
MTSPD430
4 -30mm
2mm
100
14
MTSPD432
4 -32mm
2mm
105
15
MTSPD439
4 -39mm
2-3mm
107
14
MTSPD535
5 -35mm
2-3mm
100
13
MTSPD538
5 -38mm
2-3mm
95
14
MTSPD618
6 -18mm
2mm
67
7
MTSPD620
6 -20mm
2mm
71
8
MTSPD624
6 -24mm
2mm
80
10
MTSPD625
6 -25mm
2-3mm
65
7
MTSPD630
6 -30mm
2mm
98
13
MTSPD638
6 -38mm
2-3mm
100
12
MTSPD936
9 -36mm
3mm
86
10
MTSPD1020
10 -20mm
1mm
88
11
MTSPD1220
12 -20mm
1mm
76
9
MTSPD1338
13 -38mm
3mm
112
10
MTSPD1424
14 -24mm
2mm
67
6
MTSPD2030
20 -30mm
1mm
88
11
MTSPD2034
20 -34mm
2mm
75
8
MTSPD3040
30-40mm
1mm
98
11
MTSPD4050
40-50mm
1mm
107
11
Item No.
Size
Increment
Allover Length
Step QTY.
Inch
Inch
Metric (mm)
MT106025
1/8-1/2
1/32"
100
13
MT106026
1/2-1
1/16"
76
9
MT106027
1/4-3/4
1/16"
76
9
MT106028
3/16-7/8
1/16"
67
6
MT106029
3/16-7/8
1/16"
100
12

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