Core drills only drill out a portion of the resulting hole, so they will drill much faster than solid tip drill bits. Core drills can also be used to drill large holes and can be used on most non-ferrous hard materials
such as glass, stained glass, ceramic, porcelain and fiberglass, porcelain tile, limestone, slate, marble,
granite and other stone materials. | | | NCD-C
CORE DRILLS |
STANDARD LENGTH: 2"
FOR LONGER LENGTHS ADD $4.00 PER INCH
| | AVAILABLE ON REQUEST:
TIGHTER TOLERANCES, DEEPER DRILLING DEPTHS,
THINNER WALL THICKNESS, SLOTS |
CATALOG
NUMBER | OUTSIDE
DIAMETER +/- .003 | WALL
THICKNESS | OVERALL
LENGTH | DIAMOND
LENGTH
|
NCD-C4
NCD-C5
NCD-C6
NCD-C7
NCD-C8
NCD-C9
NCD-C10
NCD-C11
NCD-C12
NCD-C13
NCD-C14 NCD-C14A
NCD-C15
NCD-C16
NCD-C17
NCD-C18
NCD-C19
NCD-C20
NCD-C21
NCD-C22
NCD-C23
NCD-C24
NCD-C25
NCD-C26
NCD-C27
NCD-C28
NCD-C29
NCD-C30
NCD-C31
NCD-C32
NCD-C33
NCD-C34
NCD-C35
NCD-C36
NCD-C37
NCD-C38
NCD-C39
| .062"
.070"
.078"
.085"
.093"
.109"
.125"
.130"
.140"
.156"
.187" .220
.250"
.312"
.375"
.437"
.500"
.562"
.625"
.687"
.750"
.812"
.875"
.937"
1.000"
1.062"
1.125"
1.187"
1.250"
1.312"
1.375"
1.437"
1.500"
1.625"
1.750"
1.875"
2.000"
| .018"
.020"
.020"
.020"
.020"
.031"
.031"
.031"
.031"
.031"
.040" .046
.050"
.050"
.050"
.050"
.050"
.070"
.070"
.070"
.070"
.070"
.070"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
.092"
| 2
2
2
2
2
2
2
2
2
2
2 2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
| 1/8
1/8
1/8
1/8
1/4
1/4
1/4
1/4
1/4
1/4
1/4 1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
1/4
|
METAL BONDED MICRO CORE DRILLSCATALOG
NUMBER | OUTSIDE
DIAMETER +/- .001 | INSIDE
DIAMETER | OVERALL
LENGTH |
NMC - 01 | .024 -- .028 | .010 -- .011 | 2-1/2 |
NMC - 02 | .028 -- .030 | .012 -- .014 | 2-1/2 |
NMC - 03 | .031 -- .035 | .015 -- .016 | 2-1/2 |
NMC - 04 | .036 -- .040 | .017 -- .019 | 2-1/2 |
NMC - 05 | .041 -- .050 | .020 -- .026 | 2-1/2 |
RECOMMENDED RPM'S
FOR DIAMOND CORE DRILLS |
|
For Soft Abrasive Materials, RPM's Should Increase. For Hard Dense Materials, RPM's Should Decrease.
RPM's will vary depending on the O.D. size of the drill. To improve drill life and help reduce breakage, it is important to run drills at the proper RPM's and keep the diamonds exposed through frequent dressing.
 |
| |
| | EXCLUSIVELY DESIGNED TO GIVE WORRY FREE PERFORMANCE. FEATURING A LIGHT WEIGHT ALUMINUM BODY, SEALED BALL BEARING CONSTRUCTION WITH HIGH GRADE, NON-LEAKING OIL SEALS FOR LONG LIFE AND HIGH PERFORMANCE IN THE MOST SEVERE OF WORKING CONDITIONS.
CATALOG
NUMBER | USED FOR
DRILL SIZE | SHANK
DIAMETER | THREAD
SIZE |
| DH - 1 | 1/8" TO 3/4" | 1/2" | 3/4 - 16 |
| DH - 2 | 13/16" TO 1-1/2" | 3/4" | 1-1/2-12 |
| DH - 3 | 1-5/8" TO 9-1/2" | 3/4" | 2-1/2-12 |
|
|
| CATALOG
NUMBER | THREAD
SIZE |
| C-1 | 3/4-16 |
| C-2 | 1-1/2-12 |
| C-3 | 2-1/2-12 |
|
|
Materials you are planning to drill will have a large impact in the
types of diamond drills, equipment, and accessories you will be
able to use. If you are drilling ultra hard materials such as
sapphire, alumina, other types of advanced ceramics, high
metallic content materials, precious and natural stone. It is
generally recommended that you use a sintered (metal bonded)
diamond drill. However, if you are drilling softer and less
expensive materials such as glass, composites, soft stone and
tile, an electroplated (nickel bonded) diamond drill may be a
better and more cost effective solution. As a rule of thumb
harder materials require softer bond, to drill faster and freer.
While softer and abrasive materials require a harder bond, to
last longer.
Material thickness will also play a critical role in your diamond drilling
operation. Usually thicker materials require larger amount of coolant
and water pressure. Drilling Depth of most applications require
drilling depth of not more than 1î. Applications requiring you to drill
over 1î should be tread in a different way. We recommend running
coolants from multiple directions. Through drill center, from side of
drill, as well as drilling submerged in coolant. This will insure
maximum amount of coolant and lubrication reaching your drilling
zone. Apply more pressure and reduce speed the deeper you
penetrate into your material. Lift drill up, after every inch drilling into
your material, letting the drill cool and coolant reach deeper into your
hole. Carefully examine the diamond tip condition, making sure its
round, and not overheated.
Depending on the material you are planning to drill, you will
need to adjust the speed (RPM) at witch you diamond drills run.
A drill press will usually allow you to run your diamond drills
between 500 RPM (Revoltutions Per Minute) to 3,500 RPM.
Some Drill Presses only provide specific speed settings, such as
500, 1,000, 1,500, 2,00, 2,500, and 3,000 RPM. This may be
acceptable to you, again depending on the diameter of the
diamond drill and material you are planning to use it on.
Coolant to be used
Your capability to use coolant while drill, will seriously effect your
diamond drill selection. Most diamond core drills must be used with
coolant. When drilling with diamond drills, the proper use of coolant is
important for two reasons.
Minimize Drill & Material Overheating
Frictional heat produced at the working face of diamond tip must be
disposed immediately. Otherwise the diamond become rapidly
damaged by oxidation and graphitization. Excessive heat generated
while drilling will also damage the metal matrix holding the diamonds in
place.
Insure Drilling Consistency
Debris generated while drilling should be removed as soon as they are
produced. When this drilling debris is not removed rapidly, diamond
wear increases through abrasion caused by the presence of excessive
coarse stone fragments.
Water is the most common coolant used for most drilling application. It
is always a good idea to pump an adequate supply of water through the
center of the drill. So that an uninterrupted flow is maintained flushing
across the working surface of the drill diamond section. In this way
diamonds and the metal matrix are both kept sufficiently cool. And rock
debris is removed as soon as it is produced. This is the most optimum
condition for your drill.
Reduce Friction between material and drill
Water also penetrates the micro-cracks witch are generated upon
impact of material and diamond drill. Under ideal conditions, the
material will absorb water, hence becoming completely saturated with
water. In this state the material is weaker and more easily drillable. The
coolant surface tension also plays an important part in the drilling
operation. Usually the lower the surface tension, the easier it is for the
coolant to enter the micro cracks. Coolant with a lower surface tension
also wets the diamonds more easily. Most users find that by lowering
the surface tension of their coolant, resulted in better cooling (wetting)
of their diamond, and more effective overall cooling.
High production applications that require hundreds of holes,
involve use of Sintered (Metal Bond) Diamond Drills. As a general
rule of thumb, Metal Bond (sintered) diamond drills last longer than
other diamond drills available. Although Drilling life will varies with
manufacturer, and hardness of material being drilled. With most
conventional sintered (metal bonded) diamond drills, you should be
able to obtain 450 to 1200 holes. Metal bonded diamond core drills
have diamonds sintered and multiple layers of diamonds
impregnated inside the metal matrix. They wear evenly, and are
known for their consistency. Sintered (metal bonded) diamond
core drills are the latest technology available in diamond drills. And
represent the best value and performance per hole
