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MODEL T10538
12-PIECE GLASS/
GRANITE DRILLING SET
INSTRUCTIONS
COPYRIGHT © APRIL, 2012 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#BL14979 PRINTED IN CHINA, REVISED SEPTEMBER, 2016 (JH)
Introduction
This set features 11 diamond bits that cut through
mirror, non-tempered glass, ceramics, porcelain,
limestone, marble, and granite. DO NOT drill tem-
pered glass! Tempered glass will shatter.
These bits can be used with a handheld drill or
drill press. Use a drill press whenever possible for
greater control and precision (see
Figure 1).
Eye injuries, respiratory problems, or hear-
ing loss can occur while operating this
tool. Wear personal protective equipment to
reduce your risk from these hazards.
Drilling Speeds
Use the chart below to select the appropriate drill-
ing speed (RPM) for the bit.
IMPORTANT: Use only light to medium pressure
when drilling. Increased pressure will not increase
cutting speed. Always ensure drill bit is properly
lubricated with water to prolong bit life and ensure
clean cuts.
Figure 1. Model T10538 12-piece drill bit set.
Description Qty
A. Drilling Guide .............................................. 1
B. Bits
3
⁄
16
",
1
⁄
4
",
5
⁄
16
",
3
⁄
8
",
1
⁄
2
",
3
⁄
4
",
7
⁄
8
",
1", 1
1
⁄
8
", 1
1
⁄
4
", 1
3
⁄
8
" ..................................1 Ea.
Inventory
A
B
Bit Size Fiberglass
Glass/
Ceramic
Tile
G r a n i t e /
Porcelain
3
⁄
16
"
– 3
⁄
8
"
1100 RPM
700 RPM
350 RPM
3
⁄
8
"
– 1
⁄
2
"
800 RPM
550 RPM 300 RPM
1
⁄
2
"
– 3
⁄
4
"
600 RPM
450 RPM 250 RPM
3
⁄
4
"
–
1
3
⁄
8
"
500 RPM
350 RPM 200 RPM
To prolong bit life and ensure clean cuts ,
only apply light pressure to workpiece, use
appropriate drill speed for material, and
thoroughly lubricate drill bit with water.
DO NOT use diamond bitS to drill through
tempered glass, as it will shatter.
