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MSD taper button bits with hot-pressed carbide and anti-rupture skirt design. 5-6x lifespan of standard bits. For pneumatic rock drills in hard rock drilling.
MSD manufactures tapered button bits with premium tungsten carbide inserts for shallow-hole drilling applications. Available in 7°, 11°, and 12° taper angles to match standard tapered rod systems. The friction-fit self-tightening mechanism means the harder you hit, the tighter the bit grips — no threads required. Quick bit changes by simple tapping, no rotation needed. Ideal for secondary breaking, small quarry production, construction anchor holes, and bench drilling under 5 meters depth. Diameter range: 28–45 mm. Each bit undergoes insert brazing inspection and hardness verification. ISO 9001 certified.
| Schema | Diameter (mm) | Diameter (inch) | Gauge | Front | Button Angle° | Flush (Front) | Flush (Gauge) | Weight (kg) | Part No |
|---|---|---|---|---|---|---|---|---|---|
 | 32 | 1 1/4" | 3×8 | 1×8 | 35° | 1 | 1 | 0.24 | 32-722PFF3 |
| 34 | 1 11/32" | 3×8 | 1×8 | 35° | 1 | 1 | 0.26 | 34-722PFF3 | |
| 36 | 1 7/16" | 3×9 | 1×8 | 35° | 1 | 1 | 0.27 | 36-722PFF3 | |
| 38 | 1 1/2" | 3×9 | 1×8 | 36° | 1 | 1 | 0.32 | 38-722PFF3 | |
| 40 | 1 37/64" | 3×9 | 1×8 | 30° | 1 | 1 | 0.36 | 40-722PFF3 | |
| 40 | 1 37/64" | 3×9 | 1×9 | 35° | 1 | 1 | 0.36 | 40-722PFF3 | |
| 42 | 1 21/32" | 3×9 | 1×8 | 30° | 1 | 1 | 0.40 | 42-722PFF3 | |
| 42 | 1 21/32" | 3×9 | 1×9 | 35° | 1 | 1 | 0.40 | 42-722PFF3 |
| Schema | Diameter (mm) | Diameter (inch) | Gauge | Front | Button Angle° | Flush (Front) | Flush (Gauge) | Weight (kg) | Part No |
|---|---|---|---|---|---|---|---|---|---|
 | 32 | 1 1/4" | 5×7 | 2×7 | 35° | 2 | 1 | 0.24 | 32-722PFF5 |
| 34 | 1 11/32" | 5×7 | 2×7 | 35° | 2 | 1 | 0.29 | 34-722PFF5 | |
| 36 | 1 7/16" | 5×8 | 2×7 | 35° | 2 | 1 | 0.32 | 36-722PFF5 | |
| 38 | 1 1/2" | 5×8 | 2×7 | 35° | 2 | 1 | 0.34 | 38-722PFF5 | |
| 38 | 1 1/2" | 5×9 | 2×7 | 35° | 2 | 1 | 0.34 | 38-722PFF5 | |
| 40 | 1 37/64" | 5×9 | 2×7 | 35° | 2 | 1 | 0.39 | 40-722PFF5 | |
| 41 | 1 5/8" | 5×9 | 2×8 | 35° | 2 | 1 | 0.39 | 41-722PFF5 |
| Schema | Diameter (mm) | Diameter (inch) | Gauge | Front | Button Angle° | Flush (Front) | Flush (Gauge) | Weight (kg) | Part No |
|---|---|---|---|---|---|---|---|---|---|
 | 41 | 1 5/8" | 5×9 | 2×8 | 35° | 2 | 1 | 0.39 | 41-725PFF5 |
| 43 | 1 11/16" | 5×9 | 2×8 | 35° | 2 | 1 | 0.39 | 43-725PFF5 | |
| 45 | 1 3/4" | 5×9 | 2×8 | 35° | 2 | 1 | 0.45 | 45-725PFF5 | |
| 51 | 1 31/32" | 5×10 | 2×9 | 35° | 2 | 1 | 0.62 | 51-725PFF5 |
| Bit Diameter | Taper Degree | Rod Size | Typical Applications |
|---|---|---|---|
| 32-42mm (1¼-1⅝") | 7° | Hex 22mm (7/8") | Hardest rock, maximum grip, high-frequency impact |
| 32-41mm (1¼-1⅝") | 11°/12° | Hex 22mm (7/8") | General purpose, medium-hard rock, industry standard |
| 41-51mm (1⅝-2") | 7° | Hex 25mm (1") | Heavy-duty hard rock, extended skirt for deeper reach |
| Taper Degree | Grip Strength | Bit Change | Best For |
|---|---|---|---|
| 7° | Tightest | Harder to detach | Hardest rock (f>16), extreme vibration, maximum security |
| 11° | Medium | Easy | Medium-hard rock, general underground mining |
| 12° | Medium | Easiest | Industry standard, quick bit changes, most common choice |
| Condition | Choose Taper | Choose Thread |
|---|---|---|
| Hole Diameter | ≤45mm | ≥45mm |
| Hole Depth | Shallow holes, single rod | Deep holes, extension rods needed |
| Equipment | Handheld pneumatic drills (YT24/YT28), light rigs | Heavy hydraulic drill rigs |
| Rod Connection | Single rod only | Can connect extension rods |
| Bit Change | Tap to release | Unscrew |
| Face Type | Rock Hardness | Abrasiveness | Key Feature |
|---|---|---|---|
| Flat Face | Hard to very hard | Highly abrasive | Maximum durability, most foolproof choice |
| Convex Face | Soft to medium-hard | Non-abrasive | Fastest penetration, low air pressure applications |
| Concave Face | Medium-hard | Moderate | Best hole straightness, efficient flushing, versatile |
| Drop Center Face | Soft to medium-hard | Low | Excellent straightness, good in fractured ground |
| Button Shape | Position | Best For | Characteristics |
|---|---|---|---|
| Domed/Spherical | Gauge | Very hard, highly abrasive rock | Maximum wear resistance |
| Parabolic | Gauge or Front | Medium-hard, moderate abrasiveness | Balanced speed and durability |
| Ballistic | Front | Medium-hard, less abrasive | High penetration rate |
| Conical/Sharp | Front | Soft, non-abrasive rock | Fastest penetration, speed priority |
APPLICATIONS
CASE STUDIES
MSD Concentric Casing System achieved 100% hole completion across 36 water wells in South
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MSD T51-115mm thread button bit achieved 25% faster drilling and 30% longer life at Austra
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MSD DTH hammer + drill pipe system achieved 24% faster drilling and 26% lower cost at Braz
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MSD QL60-178 DTH bit achieved 340m per bit and 35% lower drilling cost in Russian hard roc
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MSD custom 500mm DTH bit achieved zero structural failures and 40% efficiency gain in Taiw
Read MoreMSD (Zhuzhou Jingde Machinery Co., Ltd.) is a China-based rock drilling tools manufacturer with 23+ years of experience, specializing in taper button bits, threaded button bits, DTH hammers, and complete top hammer drilling solutions for mining, quarrying, tunneling, and construction applications.
A taper button bit is a rock drilling bit designed for short-hole applications using a friction-fit tapered connection to the drill rod. Unlike threaded connections requiring rotation to attach and detach, taper bits lock instantly under impact and release with a simple tap—enabling the fastest bit changes in the industry. The tapered shank (available in 7°, 11°, or 12° angles) wedges tighter into the rod socket with every hammer blow, creating a self-reinforcing grip that never loosens during drilling.
Taper button bits are the standard choice for pneumatic rock drills in hole diameters up to 45mm. Common applications include secondary crushing, rock bolt support, roadway excavation, underground drifting, bench drilling, and tunneling support.
The top hammer drilling system delivers impact energy from the rock drill directly to the bit face through a precisely engineered chain of components:
Rock Drill (Drifter): Generates high-frequency percussive impact and rotation.
Shank Adapter: Connects to the rock drill, absorbs initial hammer impact, and transmits energy to the rod. (Note: Handheld pneumatic rock drills like YT24/YT28 connect directly to rods with forged hex shanks.)
Tapered Drill Rod: Transmits stress waves from the shank to the bit. Available in Hex 22mm (7/8") and Hex 25mm (1").
Taper Button Bit: Converts stress wave energy into rock-breaking mechanical force at the hole bottom.
The friction-fit taper connection between rod and bit is the critical link—MSD taper bits feature precision-machined taper bores with 100% surface contact ensuring complete energy transfer and eliminating stress concentrations that cause premature failure.
Anti-Rupture Skirt Design with Proprietary Heat Treatment: Skirt rupture—when the tapered socket cracks under heavy impact—is the most common taper bit failure. MSD eliminates this through proprietary localized heat treatment: extreme hardness at the bit head secures carbide inserts, while exceptional fatigue toughness in the skirt section resists cracking. Combined with precision-machined taper bores achieving 100% surface contact, this design reduces stress concentration by 40%. MSD taper button bits maintain skirt rupture rates below 0.1%.
Deep-Seated YK05 Carbide Inserts: Insert fallout is the second most costly failure mode. MSD uses premium YK05 grade tungsten carbide with precision cold-pressing insertion. Our carbide buttons seat 1-2mm deeper than industry standard, dramatically improving retention. In highly abrasive hard rock, insert fallout rate remains below 0.05%, and overall bit service life exceeds comparable products by 20%.
5-6x Extended Service Life: Upgraded from standard flat drill bits, MSD taper button bits feature alloy steel construction with hot-pressed carbide inserts. This delivers 5-6 times the service life of flat drill bits with the same diameter, reducing bit consumption, minimizing downtime, and accelerating project completion.
Secondary Crushing: Breaking oversized boulders and secondary fragmentation requires rapid bit changes and reliable performance—ideal for taper systems.
Rock Bolt Support: Rock bolt holes, cable bolt holes, and ground support drilling benefit from the speed and simplicity of taper connections.
Roadway Excavation: Development headings, crosscuts, and drifting in underground mines demand maximum drilling productivity with quick bit-change capability.
Tunneling Support: Support hole drilling in tunnel construction requires consistent performance in variable rock conditions.
Bench Drilling & Quarrying: For small-diameter blast holes up to 45mm, taper systems offer faster rod handling and lower cost per hole than threaded systems.
Choose Taper When: Hole diameter ≤45mm, shallow single-rod holes, using handheld pneumatic drills (YT24/YT28) or light hydraulic rigs, maximum bit-change speed required.
Choose Thread When: Hole diameter ≥45mm, deep holes requiring extension rods, using heavy hydraulic drill rigs, higher torque transmission needed.
Taper connections cannot be extended—if your application requires holes deeper than a single rod length (typically 2-4 meters), switch to a threaded system with extension rods.
7° Taper Series:
Standard Skirt: 32-42mm diameter, Hex 22mm rod, 0.24-0.40kg. Long Skirt: 32-51mm diameter, Hex 22mm/25mm rod, 0.24-0.62kg. Best for: Hardest rock conditions requiring maximum grip security
11°/12° Taper Series:
Short Skirt: 32-41mm diameter, Hex 22mm rod, 0.24-0.39kg. Best for: General-purpose drilling, medium-hard rock, industry standard
All MSD taper button bits are available in Flat Face, Convex Face, Concave Face, and Drop Center Face designs with multiple button configurations.
Underground Gold Mine, Peru: MSD 12° taper button bits (32mm & 34mm) with Hex 22mm tapered rods deployed in development drifting through highly abrasive andesite and quartz veins (hardness f=16). Previous supplier's bits suffered frequent insert fallout and skirt rupture.
Results: 35% longer grinding intervals—drilling footage between regrinds increased 35%. Zero skirt ruptures—no skirt failures during 3-month trial, eliminating stuck-bit incidents. 22% lower cost-per-hole—overall drilling consumable costs reduced 22%.
MSD taper button bits combine proprietary anti-rupture skirt design with deep-seated YK05 carbide inserts delivering the industry's lowest failure rates: skirt rupture<0.1%, insert fallout <0.05%, with 5-6x service life versus standard bits. Trusted by 500+ drilling contractors in 40+ countries, we deliver OEM-grade quality at China factory pricing from Zhuzhou, China's tungsten carbide capital.
Beyond manufacturing, we provide complete drilling solutions. Our engineers analyze your project's geology and objectives to recommend the ideal bit diameter, taper degree, face design, and button shape combination. By optimizing the entire system, we help you achieve the lowest possible cost per meter. With a massive inventory and agile production, we ensure your project stays on schedule. Trust MSD for reliable tools and expert support that drive your profitability.
Technical content reviewed by MSD Engineering Team. | About MSD: Zhuzhou Jingde Machinery Co., Ltd. — 23+ years of taper button bits manufacturing expertise | ISO 9001 Certified | Serving 500+ contractors in 40+ countries
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Technical content reviewed by MSD Engineering Team.
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