When drilling metals, use a cutting
compound such as MAG-LUBE super
concentrated cutting fluid.

HIGH SPEED STEEL BITS > MAG 851
851 HSS STEP DRILLS

NO. OF
STEPS
SMALLEST
DIA.
MM
LARGEST
DIA.
MM
SHANK
PART
NUMBER
UPC NO.
722170
13
1/8"
1/2"
13
1/4"
851.0500A-01
85101
All Steps: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
6
3/16"
5
1/2"
13
1/4"
851.0500B-02
85102
All Steps: 3/16", 1/4", 5/16", 3/8", 7/16", 2"
9
1/4"
6
3/4"
19
3/8"
851.0750-03
85103
All Steps: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
3
3/8"
10
3/4"
19
3/8"
851.0750B-09
85107
All Steps: Pilot holes for K.O. punch drive screws 3/8", 7/16", 3/4"
12
3/16"
5
7/8"
22
3/8"
851.0875-04
85104
All Steps: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"
8
7/8"
14
1-3/8"
25
3/8"
851.1000-20
85111
All Steps: 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"
12
7/16"
11
1-1/8"
29
3/8"
851.1125-05
85105
All Steps: 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1-1/16",
1-1/8"
2
7/8"
22
1-1/8"
29
3/8"
851.1125B-11
85108
All Steps: 7/8", 1-1/8"
11
3/4"
19
1-3/8"
35
3/8"
851.1375-06
85106
All Steps: 3/4", 13/16", 7/8", 15/16", 1", 1-1/16", 1-1/8", 1-3/16", 1-1/4", 1-5/16",
1-3/8"
5
7/8"
22
1-3/8"
35
3/8"
851.1375B-12
85109
All Steps: 7/8" for 1/2 conduit - 1-1/8" for 3/4 conduit, 1-7/32" for oil tight switch,
1-1/4"-1-3/8" for 1" conduit
10
13/16"
21
1-3/8"
35
3/8"
851.1375R-21
85112
Self centering Step Reamer requires 13/16" pilot hole. All Steps: 3/16", 7/8", 15/16", 1", 1-1/16", 1-1/8", 1-13/16", 1-1/4", 1-5/16", 1-3/8"
11
1/4"
6
1-1/2"
38
3/8"
851.1500-08
85110
All Steps: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1-1/8", 1-1/4", 1-3/8", 1-1/2"
UNIT PACK: 1

Two flutes for cleaner cut
Split point prevents walking
Self centering

High speed steel drills for multiple-size, perfectly round, burr-free holes in thin materials. No pilot hole required except 851.1000R & 851.1375R. For use in sheet steel, non-ferrous metal, pvc,
plastic laminates such as Formica and even plywood.





*Two flutes for cleaner cut.
Split point prevents
walking.

Part No. 851-0500A-01 & 851-0500B-02 have Q.C. Hex Shank.
All Other Shanks with 3 Flats
851.1500-08*
851.0500A-01

851.0750B-09

 851.1125B-11
 851.1375B-12*
Together, these two bits cover all
usual holes from 1/8" through 1-1/2".
*3 flute design 		Drills pilot holes for the 3 most
popular sizes of knock out punch
drive screws: 3/8", 7/16" and 3/4".
Drills 1/2" and 3/4"
conduit KO holes.
 7/8" hole for 1/2" conduit,
1-1/8" hole for 3/4" conduit,
1-3/8" hole for 1" conduit,
1-7/32" hole for oil-tight switches.
Products are shown at a reduced size and are not proportional to each other
© 2004 Mag-Bit