Dome Reaming Drill Bit Rock Drill Bit R32 89mm with Spherical Button for Hard Rock Blasting Holes

Brand Name:MIROC by KSQ
Certification:ISO9001
Model Number:RE1389-R32-S
Minimum Order Quantity:10 Pieces
Delivery Time:5-15 Working Days
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
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Location: Beijing Beijing China
Address: Room9-616, No. 10 Zhenxing Road (MDW Plaza), Changping District, 102200 Beijing, China
Supplier`s last login times: within 28 hours
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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 typeSpherical buttonUniversal button
Wearing resistance good
Best suited to hard ground
27,000~48,000 PSI (180 to 320 Mpa)
Abrasive to very abrasive
Hemispherical buttonUniversal button
Wearing resistance good
Best suited to hard ground
25,000~45,000 PSI (170 to 300 Mpa)
Abrasive to very abrasive
Parabolic buttonUniversal button
Fast penetration
Best suited to medium to hard rock
15,000~25,000 PSI (100 to 170 Mpa)
Midly abrasive ground
Conical buttonFast penetration
Best suited to smaller diameter bits
Suited for all non-abrasive ground types
Ballistic buttonFast penetration
Best suited to soft rock
10,000~20,000 PSI (70 to 140 MPa)
Non abrasive ground

TypesDimensionsFlushing hole(mm)Buttons(mm)Angle
mminFront No SizeGauge No SizeFront No SizeGauge No Size
T38 Dome bit893.52x92x81x1214x1235°
10252x92x91x1214x1235°
12754x82x91x1416x1435°

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:

TypesDimensionsFlushing hole(mm)Buttons(mm)Angle
mminFront No SizeGauge No SizeFront No SizeGauge No Size
Pilot Bit 12° Taper411 5/82x52x5.52x84x930°
Reaming bit 12°Taper893 1/2--4x108x1135°
1024--4x128x1235°
Dome Bit7632x92x71x1114x1135°
893 1/22x92x81x1214x1235°
10242x92x91x1214x1235°


China Dome Reaming Drill Bit Rock Drill Bit R32 89mm with Spherical Button for Hard Rock Blasting Holes supplier

Dome Reaming Drill Bit Rock Drill Bit R32 89mm with Spherical Button for Hard Rock Blasting Holes

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