Page 25 - Diamond Products Catalog

BIT NAMING CONVENTION
Finding the right bit for the job is easy. The naming convention directly corresponds to the description of the bit in the list of part numbers.
NQ 07UMX – R C16 FD STAGE 2
123456
1. Size
Bits are available in all standard drilling sizes B, N, H, and P.
2. Matrix Formula
Impregnated bits are available in a variety of different formulas to cover the widest possible range of ground conditions. See page 26 or 34 for additional details about specific formulas.
3. Gauge
Boart LongyearTM bits are available in three standard outer diameter guage configurations.
4. Crown Height
Impregnated bits are available in four crown heights.
5. Options
Impregnated bits are available in optional configurations as follows:
Face Discharge (FD) - recommended for soft and/or broken ground conditions to improve core recovery.
Tapered Waterways (TW) - Recommended for soft and broken ground applications where blocking of regular waterways is possible.
Thermally Stable Diamond Pins
(PINS) - Recommended for use in very broken ground conditions to reduce matrix wear.
6. Waterways
Bits are distinct by the number and size
of waterways. Each bit lists the number
of waterways followed by the size of the waterways in tenths of an inch. StageTM bits list the number of stages.
Face Discharge (FD)
Tapered Waterways (TW)
Thermally Stable Diamond Pins in Matrix (PINS)
Standard gauge (S)
Less than reaming shell gauge (-R)
Oversize Outer Diameter (OS inches)
9mm (C9)
12mm (C12)
16mm (C16)
25mm (C25)
© Copyright 2014 Boart Longyear. All rights reserved.
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