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DTH Hammers
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Technical Description |
| Component Name |
Part No. |
60 Bit
65
Bit
475 Bit
500 Bit
jet 60 Bit
jet
65 Bit
Jet 550 bit
Jet 1000 Bit for 1000
Ham
Jet 1000 Bit for 80 Ham
Jet 1100
Bit
Jet 1200 Bit
Panther 350 Bit
RC3
500 Bit |
BJCR 600
BJCR
650
BJCR 475
BJCR 500
BJ 600
BJ
650
BJ 550
BJ1000 JET1000
BJ1000
JET80
BJ1100
BK1200
BP350
BRCS500 |
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BIT MAINTENANCE
Carbide
inserts should be ground when the buttons
exhibits, flats equal to 1/3rd diameter of the
insert.
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| Original Carbide |
DiaGrinding at
Dia |
| 13 mm |
4 mm |
| 14 mm |
5 mm |
| 16 mm |
5.6 mm |
| 18 mm |
6.0
mm |
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As the wear of the carbide increases, the
rate of penetration goes down. Bit performs best
when the carbide inserts (buttons) are in their
original shapes. Worn bits have a direct effect
on drilling productivity and drilling cost.
Grinding can certainly improve drilling results
and reduce overall related costs by both
extending bit life and providing optimum
performance.
Carbide (buttons) are
resistant to wear and abrasion, they do indeed
develop signs of wear. The most common wear
pattern is a "flat" at the impact area. This is
most associated with drilling in hard and
abrasive rock conditions. As this "flat" area
becomes large the effective cutting action is
reduced. If not corrected this situation can
develop into large problems including carbide
"breakage" or "shearing". Grinding at regular
intervals assures of maximum bit performance. |
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