Diamond Coated Core Drills and Micro Core Drills Metal Bond .010 to 2.0" Diameter ID 2146-

Part Number: 2146-
Diamond Coated Core Drills and Micro Core Drills Metal Bond .010 to 2.0
Diamond Coated Core Drills & Micro Core Drills Metal Bond .010 to 2.0" Diameter
Your Price: $120.04USD
Availabilty: In Stock to 5-10 days
Diamond Coated Core Drills and Micro Core Drills Metal Bond .010 to 2.0" Diameter

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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 DRILLS
CATALOG
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

 The ever increasing variety of advanced, new generation, ultra hard, composite, micro, and exotic materials transform the way we look at diamond drilling. And set many age old diamond drills and drilling methods obsolete. New materials require different technology and methods. 
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



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