Drilling into hard rock demands tools that combine precision engineering with exceptional durability. Among the most widely used
rock drilling tool options in mining, tunneling, and quarrying, thread button bits stand out for their reliability and performance. Whether you are operating a surface mine, boring a tunnel, or extracting dimensional stone, selecting the right
thread button bit can make a measurable difference in penetration rate, bit life, and overall project cost. This guide walks through the key factors that influence thread button bit selection and explains how sourcing from an experienced manufacturer can streamline your procurement process.
What Are Thread Button Bits?
Thread button bits are top hammer drilling tools in which tungsten carbide buttons are pressed into a steel body. The bit body features a threaded connection at the rear that screws onto a drill rod or shank adapter, transferring both rotation and percussion energy from the rock drill to the rock face. The carbide buttons crush and chip the rock under high-frequency impact, while the flushing holes clear cuttings from the hole. Because the thread connection is standardized, these bits are compatible with hydraulic and pneumatic drifters from major brands such as Atlas Copco, Sandvik, and Furukawa.
TY Drill Bits manufactures
thread button bit products across a full range of thread sizes, covering diameters from 45mm to 127mm. The company's lineup includes standard, retrac, and reinforced skirt designs, with flat face, ｄｒｏｐ center, and convex face configurations available to match different rock conditions. Each bit is produced from premium alloy steel and fitted with tungsten carbide buttons selected for the target formation hardness.
Thread Types and Sizes: Choosing the Right Connection
Thread size is the first decision point when selecting a button bit, because it must match the drill rod and shank adapter already in use. The thread system also determines the bit's torque capacity and overall robustness. Below is a summary of the most common thread types and their typical applications:
| Thread Type |
Typical Diameter Range |
Best Suited For |
| R25 |
45mm – 65mm |
Light drifting, small-scale tunneling, bench drilling |
| R32 |
51mm – 76mm |
General mining, development drifting, bolting |
| T38 |
64mm – 89mm |
Production drilling, medium to hard rock formations |
| T45 |
76mm – 102mm |
Heavy-duty mining, large-diameter blast holes |
| T51 |
89mm – 127mm |
Deep-hole production drilling, hard abrasive rock |
TY Drill Bits supplies R25, R32, T38, T45, and T51 thread button bits. For example, the
R25-65mm tungsten carbide button bits are a popular choice for light surface drilling, while the
T51 Retrac rock button bit handles the punishing conditions of deep ore mining. For underground operations requiring reliable hole straightness, the
T38 76 retrac button bit provides excellent stability in fractured rock.
Face Designs and Button Shapes
Once the thread size is determined, the next consideration is the bit face design and button configuration. The face geometry affects drilling speed, hole straightness, and flushing efficiency.
Flat Face: Provides the best hole straightness and is ideal for blast-hole drilling where deviation must be minimized. The
R32-64mm retrac type button drill bit with a flat face design excels in this role.
ｄｒｏｐ Center: The recessed center allows the bit to self-center while drilling, reducing deviation in fractured or angled ground. The
T51-115mm retrac button bit adopts a ｄｒｏｐ center profile for demanding production drilling.
Convex Face: Offers the fastest penetration rate in competent rock by concentrating impact energy, though it may wander more in fractured conditions.
Button shapes also play a critical role. Spherical buttons are preferred for hard, abrasive rock because they retain their shape longer under high-impact loads. Ballistic buttons penetrate faster in softer rock but wear more quickly in abrasive formations. TY Drill Bits can configure button shape and count according to the specific rock type and drilling application.
Key Applications Across Industries
Thread button bits are deployed across a wide range of industries. In underground mining, they are used for face drilling, production blasthole drilling, and rock bolting. The
45mm thread rock button bit is particularly suited for narrow-vein mining where hole diameter must be kept small. In open-pit mining and quarrying, larger bits in the T45 and T51 range drill blast holes for bench extraction. Tunneling and civil engineering projects such as road and railway tunnels rely on R32 and T38 bits for cross-section drilling and ground support installation.
Outside of mining, thread button bits are also used in dimensional stone quarrying, foundation drilling for construction, and geothermal heat-pump boreholes. The versatility of the thread connection system means that a single
rock drilling tool platform can cover multiple hole sizes simply by changing the bit.
How to Choose the Right Thread Button Bit
Selecting the optimal thread button bit involves balancing several factors. Start by identifying the rock type and hardness. Soft to medium rock allows for ballistic buttons and a convex face for faster drilling. Hard, abrasive rock calls for spherical buttons and a flat or ｄｒｏｐ center face to maintain hole quality and bit life. Next, confirm the available drill rig and rod system to determine the correct thread size. Finally, consider the hole depth and flushing requirements. Deeper holes generate more cuttings and demand efficient flushing channels, which is why retrac-style bits with enhanced flushing are often recommended for production drilling.
Quick Selection Checklist:
• Match the thread size to your existing drill rods and shank adapters
• Choose face design based on rock condition and required hole straightness
• ｓｅｌｅｃｔ button shape (spherical vs. ballistic) according to rock hardness
• Consider retrac-style bits for fractured ground or deep-hole drilling
• Verify flushing hole configuration for your air or water pressure system
Why Source Thread Button Bits from TY Drill Bits
Xi'an TY Drill Bits (Xi'an Heaven Abundant Mining Equipment CO., LTD) has been supplying the global drilling industry since 2010. Based in Xi'an, Shaanxi, China, the company operates an ISO9001-certified production facility and exports over 91% of its output to international markets. As both a manufacturer and trading company, TY Drill Bits offers a complete range of drilling consumables, including
PDC drill bit products,
tricone bit options, and a full selection of thread button bits from R25 to T51.
Customers benefit from OEM service capabilities, allowing customization of button configuration, face design, and thread specifications to match specific job requirements. With a lead time of within 15 working days and flexible payment terms including L/C, T/T, and PayPal, the procurement process is designed to be straightforward for international buyers. The company's purchasing team, deeply familiar with the domestic oil drill and mining equipment manufacturing landscape, can also source complementary products upon request.
For operations that require a complete
rock drilling tool package, TY Drill Bits also supplies
DTH drilling tool equipment including hammers and bits, as well as drill rods, shank adapters, and coupling sleeves. This one-stop capability reduces the administrative burden of managing multiple suppliers and ensures compatibility across the entire drill string.
Get Expert Advice and a Competitive Quote
Choosing the right thread button bit is a technical decision that directly impacts your drilling productivity and cost per meter. The team at TY Drill Bits is available to discuss your specific rock conditions, rig specifications, and operational goals. Contact Ms. Lucy Li at Lucy@tydrillbits.com or call +86 15389082037 to request a quotation, inquire about bulk pricing, or discuss custom configurations. With ISO9001 certification, OEM flexibility, and over a decade of experience, TY Drill Bits is ready to support your next drilling project.
Xi'an Heaven Abundant Mining Equipment CO.,LTD
