Primarily used for drilling roof-bolt support holes in coal mines, these bits deliver high stability, excellent hole accuracy, and outstanding reliability under complex geological conditions.
Roof-Bolt Bit Life Span
Extensive field tests have proven their stable performance and long-lasting durability under complex coal seam conditions, ensuring higher drilling efficiency and lower operational costs.
Jingwei PDC roof-bolt bit series is primarily designed for roof bolt drilling in coal mines, maintaining excellent stability and high hole accuracy even under interbedded strata, fractured zones, and highly abrasive geological conditions.
With optimized structural design and next-generation polycrystalline diamond compact (PDC) technology, each bit delivers a drilling rate approximately 40% faster and wear resistance up to 20 times higher than conventional carbide-tipped roof-bolt bits—significantly reducing bit replacement frequency and overall operational costs.
Engineered with high-precision blade geometry and reinforced welding technology, Jingwei bits outperform comparable products in wear control, hole precision, and overall drilling stability, making them an essential tool for roadway excavation and ground support operations in coal mines.
Full-Blade Roof Bolt Bits
Primarily used for drilling roof-bolt holes in coal and rock strata, Full-Blade Roof Bolt Bits provide superior hole stability, extended service life, and reliable performance in hard or fractured formations.
SUPERIOR
IMPACT TOLER ANCE
AND WEAR RESISTANCE
IMPROVING PRODUCTIVITY
WHILE LOWERING
OPERATOR EFFORT.
Full-Blade Roof Bolt Bit
40%
FASTER DRILLING RATE
20times
HIGHER WEAR RESISTANCE
Description
The two-wing full-blade design provides continuous cutting and high impact tolerance in hard and fractured rock. It delivers smooth start-up/re-entry, excellent hole roundness, and low deviation—ideal for high-efficiency coal-mine roof-bolt holes.
Applicable Formations
Size Range (mm)
Full-Blade Internal Thread Roof Bolt Bit
Full-blade PDC bit offers high cutting efficiency and stable full-face engagement. Continuous, uniform contact with the rock minimizes localized loading and cutter chipping that can degrade performance. A stiffer, stronger bit body delivers superior impact tolerance and wear resistance, maintaining steady penetration in medium to hard and complex formations. This reduces regrinding and bit-change frequency, improving productivity while lowering operator effort.
Description
The internal-thread full-blade design combines robust full-PDC strength with easy assembly, suited for complex for mations.
Applicable Formations
Size Range (mm)
Half-Blade Roof Bolt Bits
The half-blade design’s core advantage is lower operating cost. Compared with full-blade bits, it delivers high drilling efficiency and better cost-performance in medium-soft, non-extreme formations. Cuttings evacuation is more forgiving—the gaps between half blades act as additional junk slots, making the bit well suited to soft, clog-prone formations.
- Lower operating coste
- Better cost-performancee
- High drilling efficiencye
- Non-extreme formations
Three-Wing Roof Bolt Bit
Three-wing structure enhances drilling stability and provides faster cuttings removal, reducing bit vibration and tool wear.
Applicable Formations
Size Range (mm)
Half-Blade Roof Bolt Bit
Two-wing half-blade bit uses wear-resistant PDC cutters for long-lasting sharpness and efficient penetration in medium-hard formations.
Applicable Formations
Size Range (mm)
Half-Blade Internal Thread Roof Bolt Bit
Internal-thread half-blade design eliminates joint breakage and allows quick replacement, ideal for soft to medium-hard formations.
Applicable Formations
Size Range (mm)
Industry Experience
Annual Production
Customized Solutions
Factory Footprint (sq.ft)
JINGWEI maintains in-house control over the entire production chain, ensures consistent quality and the agility to customize solutions, helping customers optimize performance and reduce lifecycle costs.
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