KSQ Technologies (Beijing) Co. Ltd
KSQ Technologies (Beijing) Co., Ltd.
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Dome Reaming Drill Bit Rock Drill Bit R32 89mm with Spherical Button for Hard Rock Blasting Holes
Reaming rock bit applicable to reaming for first-grade and second-grade larger-diameter hole. It can reduce the sectional area between bit blade and rock hole, also solve the problem of large diameter's low drilling speed in the hard formation with good directive.
reaming bits for quarry are designed to enlarge pilot holes for development rounds,
long hole blasting of drop raises and constructing service holes.
With Pilot adaptors, the drilling direction can be ensured and accurate.
Body Type:
Standard Skirt
Typically smaller than the head diameter to avoid cuttings and the rock wall, therefore optimizing hole flushing.
Heavy Duty Skirt
A variation on the standard skirt design, available for very abrasive conditions. The heavy duty skirt has added wear material towards the front of the skirt to protect the bit against abrasive cuttings.
Retrac Skirt
Designed to improve hole straightness, as well as to assist in retrieval of the drill string. The splines will also improve the hole flushing characteristics of the bit due to the chip ways between the splines
Button Shape Selection:
| Button type | Spherical button | Universal button |
| Wearing resistance good | ||
| Best suited to hard ground | ||
| 27,000~48,000 PSI (180 to 320 Mpa) | ||
| Abrasive to very abrasive | ||
| Hemispherical button | Universal button | |
| Wearing resistance good | ||
| Best suited to hard ground | ||
| 25,000~45,000 PSI (170 to 300 Mpa) | ||
| Abrasive to very abrasive | ||
| Parabolic button | Universal button | |
| Fast penetration | ||
| Best suited to medium to hard rock | ||
| 15,000~25,000 PSI (100 to 170 Mpa) | ||
| Midly abrasive ground | ||
| Conical button | Fast penetration | |
| Best suited to smaller diameter bits | ||
| Suited for all non-abrasive ground types | ||
| Ballistic button | Fast penetration | |
| Best suited to soft rock | ||
| 10,000~20,000 PSI (70 to 140 MPa) | ||
| Non abrasive ground |
| Types | Dimensions | Flushing hole(mm) | Buttons(mm) | Angle | |||
| mm | in | Front No Size | Gauge No Size | Front No Size | Gauge No Size | ||
| T38 Dome bit | 89 | 3.5 | 2x9 | 2x8 | 1x12 | 14x12 | 35° |
| 102 | 5 | 2x9 | 2x9 | 1x12 | 14x12 | 35° | |
| 127 | 5 | 4x8 | 2x9 | 1x14 | 16x14 | 35° | |
Product Advantage:
1. Mature heat treatment technology ensure high quality of bits
2. work reliable and very cost-effective
3. High grade tungsten carbide inserts
Specification of other Dome Reaming Button Bits:
| Types | Dimensions | Flushing hole(mm) | Buttons(mm) | Angle | |||
| mm | in | Front No Size | Gauge No Size | Front No Size | Gauge No Size | ||
| Pilot Bit 12° Taper | 41 | 1 5/8 | 2x5 | 2x5.5 | 2x8 | 4x9 | 30° |
| Reaming bit 12°Taper | 89 | 3 1/2 | - | - | 4x10 | 8x11 | 35° |
| 102 | 4 | - | - | 4x12 | 8x12 | 35° | |
| Dome Bit | 76 | 3 | 2x9 | 2x7 | 1x11 | 14x11 | 35° |
| 89 | 3 1/2 | 2x9 | 2x8 | 1x12 | 14x12 | 35° | |
| 102 | 4 | 2x9 | 2x9 | 1x12 | 14x12 | 35° | |