National Diamond Laboratory
Manufacturers of Fine Diamond Tooling

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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
PRICE
DH - 1
1/8" TO 3/4"
1/2"
3/4 - 16
$230.00
DH - 2
13/16" TO 1-1/2"
3/4"
1-1/2-12
$250.00
DH - 3
1-5/8" TO 9-1/2"
3/4"
2-1/2-12
$285.00


CATALOG
NUMBER
THREAD
SIZE
PRICE
C-1
3/4-16
$15.00
C-2
1-1/2-12
$20.00
C-3
2-1/2-12
$40.00
* SPECIALS ON REQUEST:
BRANSON,
STARLITE,
SUPER-CUT, ETC.



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