When it comes to hard rock drilling in mining, quarrying, tunneling, and construction projects, the quality of your
thread button bit selection can make or break your operation's efficiency. Among the most critical components in any top hammer drilling system is the thread button bit — a precision-engineered tool that directly determines penetration rates, hole quality, and overall drilling costs.
Whether you're sourcing for an underground mining operation, a quarry expansion, or a geotechnical drilling project, understanding the types, specifications, and selection criteria of thread button bits is essential for making informed procurement decisions. This guide walks you through everything you need to know, from thread types and face designs to product options and supplier selection.
What Is a Thread Button Bit?
A thread button bit is a type of
rock drilling tool used in top hammer drilling systems. It features tungsten carbide buttons (inserts) pressed into a steel bit body, with a threaded connection at the rear that attaches to a drill rod or shank adapter. The percussive energy from the rock drill is transmitted through the rod string to the bit, where the carbide buttons crush and fracture the rock.
Thread button bits are available in a wide range of thread sizes — including R25, R32, T38, T45, and T51 — and head diameters from 33mm to over 150mm, making them suitable for everything from small-scale anchor drilling to large production blasthole drilling.
Common Thread Types and Their Applications
Each thread type is designed for a specific range of drilling conditions and equipment compatibility. Understanding the differences helps you match the right bit to your operation.
R25 Thread
Typically used for bits with diameters of 33mm to 48mm. Ideal for light drilling applications such as anchor bolt installation and small-scale underground mining. TY Drill Bits offers the R25-48mm retrac button drill bit and R25-65mm tungsten carbide button bits for these applications.
R32 Thread
One of the most widely used thread types, accommodating bits from 45mm to 76mm. Suited for general mining, tunneling, and bench drilling. Our R32 series includes the R32-51mm 7-button thread rock drill bit, R32-57mm tungsten carbide tips bit, R32-60mm thread cross bit, and R32-76mm rock button drill bit.
T38 Thread
Designed for medium to heavy drilling, supporting bit diameters from 64mm to 89mm. Commonly used in production mining and quarrying. Available products include the T38-76mm retrac button bit for hard rock and the T38-89mm thread button bit for rock drilling in demanding conditions.
T45 Thread
Built for heavy-duty drilling with bits ranging from 76mm to 102mm. Excellent for hard rock mining and large-scale quarrying. Our T45-76mm thread button bit is engineered for reliable performance in the toughest mining environments.
T51 Thread
The largest common thread size, handling bits from 89mm to 152mm. Used in the most demanding open-pit and underground production drilling applications. The T51-115mm ｄｒｏｐ center retrac button bit and T51-127mm retrac button bit deliver exceptional durability in extreme conditions.
Face Designs and Button Configurations
The face design of a thread button bit significantly affects its performance in different rock formations. Choosing the right design is just as important as selecting the correct thread type.
Flat Face
Provides stable drilling with good hole straightness. Best suited for medium-hard to hard rock formations where precision is important. The R32-64mm flat face retrac type button drill bit is an excellent example of this design.
ｄｒｏｐ Center
Features a recessed center area that improves penetration rates and reduces the risk of hole deviation. The most common design for general-purpose drilling in varying rock conditions. The T51-115mm ｄｒｏｐ center retrac button bit exemplifies this face design.
Button shapes also vary to match formation characteristics. Parabolic and semi-ballistic buttons offer aggressive penetration in soft to medium formations, while spherical and hemispherical buttons provide superior wear resistance and impact durability in hard and abrasive rock.
Complementary Rock Drilling Tools
A complete drilling system requires more than just the bit. TY Drill Bits supplies a full range of complementary equipment to support your drilling operations:
DTH drilling tools — Down-the-hole hammers and bits for deep hole drilling in hard rock, available in sizes from Cir70 to QL50-152mm with both low and high air pressure configurations. Ideal for water well drilling, mining, and construction applications where top hammer systems reach their limits.
Drill rods — Extension rods, tapered rods, and shank adapters compatible with major drill rig brands including Atlas Copco and Sandvik. Our drill rods feature R32, T38, T45, and T51 thread connections with precision heat treatment for extended service life.
Taper button bits — An economical alternative for handheld pneumatic drilling in small quarries, secondary breaking, and dimensional stone extraction. Available in 7-degree and 11-degree taper angles with diameters from 32mm to 42mm.
How to Choose the Right Thread Button Bit
Selecting the correct thread button bit involves evaluating several key factors. Making the right choice upfront can significantly reduce your total drilling cost per meter.
- Rock Formation Hardness — Softer formations benefit from more aggressive button shapes and wider spacing, while hard, abrasive rock requires hemispherical buttons with denser spacing patterns. Match the button type and face design to your specific geology.
- Drill Rig Compatibility — Ensure the thread type matches your drill rod string and shank adapter. Verify that your rig's percussion power and rotation torque are appropriate for the bit diameter you intend to use.
- Hole Diameter and Depth — Larger diameter holes require bits with more buttons and heavier thread connections. Deeper holes benefit from retrac-style bits that help maintain hole straightness and reduce the risk of stuck drill strings.
- Flushing Requirements — Adequate air or water flushing is essential for clearing cuttings and cooling the bit. Consider the flushing hole configuration based on whether you're drilling wet or dry, and ensure your compressor or water pump can deliver sufficient volume and pressure.
- Budget and Service Life — While premium bits cost more upfront, their extended service life and faster penetration rates typically result in lower cost per meter drilled. Evaluate total cost of ownership rather than just the initial purchase price.
Why Choose TY Drill Bits as Your Thread Button Bit Supplier
ISO 9001 Certified Manufacturing
Our production processes follow strict quality control standards to ensure consistent product performance. Every batch of thread button bits undergoes rigorous inspection before shipment.
Competitive Wholesale Pricing
As a direct manufacturer based in Xi'an, China, established in 2010, we offer factory-direct pricing with flexible payment terms including L/C, T/T, D/P, PayPal, Money Gram, and Western ｕｎｉｏｎ. Annual sales volume ranges from US$1 Million to US$2.5 Million.
OEM Services Available
We provide custom manufacturing to match your specific bit design, thread type, and button configuration requirements. Our engineering team can work from your drawings or specifications.
Global Export Experience
With 91–100% of our products exported worldwide, we understand the logistics and documentation requirements of international buyers. We offer FOB, CFR, CIF, EXW, FCA, CPT, and CIP delivery terms to suit your shipping preferences.
Fast Lead Times
Whether peak season or off-season, we deliver within 15 working days to keep your projects on schedule. Our efficient supply chain ensures you receive your rock drilling tools when you need them.
Comprehensive Product Range
Beyond thread button bits, we supply PDC bits, tricone bits, diamond core bits, DTH tools, cutting tools, carbide drag bits, and portable drill rigs — making us a one-stop source for all your drilling equipment needs. With 159 products across 9 categories, you can consolidate your sourcing with a single reliable supplier.
Get a Quote for Thread Button Bits Today
Thread button bits are a critical investment for any drilling operation, and choosing the right supplier can directly impact your project's productivity and bottom line. Whether you need standard R32 bits for general mining or specialized T51 retrac bits for demanding hard rock conditions, TY Drill Bits delivers quality, consistency, and competitive pricing.
Contact our sales team today at Lucy@tydrillbits.com or call +86 15389082037 to discuss your thread button bit requirements and request a quotation. You can also reach us on WhatsApp and WeChat (gb526122709) for quick inquiries.
Xi'an Heaven Abundant Mining Equipment CO.,LTD
