📦 DTH Drill Bits
Kaishan THREAD-OPENER-BITS DTH Drill Bits for Thread Opening
Model: THREAD-OPENER-BITS
Kaishan THREAD-OPENER-BITS are specialized DTH drill bits designed for thread opening and reaming in down-the-hole drilling. Engineered with high-grade tungsten carbide buttons and a durable alloy steel body, these bits deliver reliable performance in hard rock and challenging geological conditions. The thread-opener design helps enlarge and clean pilot holes, ensuring smooth casing advancement and efficient hole completion. Compatible with standard DTH hammers and drill pipes, they are ideal for mining, water well drilling, quarrying, and construction projects. Available in various diameters and thread connections to match your drilling rig. With precision manufacturing and strict quality control, Kaishan THREAD-OPENER-BITS offer excellent wear resistance, fast penetration, and long service life, reducing downtime and overall drilling costs. Trusted by contractors worldwide, these bits are a smart choice for efficient thread opening operations.
Technical Specifications
| Model | THREAD-OPENER-BITS |
| Type | DTH Drill Bit / Thread Opener Bit |
| Size | 76mm - 305mm (customizable) |
| Application | Mining, Water Well Drilling, Quarrying, Construction |
| Material | Tungsten Carbide Buttons + Alloy Steel Body |
| Weight | 5kg - 50kg (depending on size) |
| Packing | Wooden case or carton, palletized for container shipment |
Product Details
Technical Selection
Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.
Weight
5kg - 50kg (depending on size)
Model
THREAD-OPENER-BITS
Type
DTH Drill Bit / Thread Opener Bit
Size
76mm - 305mm (customizable)
Application
Mining, Water Well Drilling, Quarrying, Construction
Material
Tungsten Carbide Buttons + Alloy Steel Body
Packing
Wooden case or carton, palletized for container shipment
Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.
Check with an engineerKey Advantages
High-grade tungsten carbide buttons for excellent wear resistance
Durable alloy steel body with heat treatment for long life
Optimized button layout for fast penetration and hole cleaning
Thread opening design for easy casing advancement
Compatible with standard DTH hammers and drill pipes
Precision manufacturing for consistent quality and performance
Applications
📍 Mining
Used in underground and surface mining for thread opening and reaming in hard rock.
Solution: Kaishan THREAD-OPENER-BITS provide reliable performance, reducing downtime and improving productivity.
📍 Water Well Drilling
Essential for casing advancement and thread opening in water well construction.
Solution: Our bits ensure smooth casing installation, minimizing risk of damage and delays.
📍 Quarrying
Ideal for reaming and thread opening in quarry blasting holes.
Solution: High wear resistance and fast penetration increase efficiency and lower cost per hole.
📍 Construction
Used in foundation piling and anchoring for thread opening in various ground conditions.
Solution: Durable design handles tough conditions, ensuring project timelines are met.
Threaded Series Models
Compare specifications across the series to find the right model.
| ☑ | Model | Model | Type | Size | Application | Material | Inquire |
|---|---|---|---|---|---|---|---|
| THREAD-OPENER-BITSThis model | THREAD-OPENER-BITS | DTH Drill Bit / Thread Opener Bit | 76mm - 305mm (customizable) | Mining, Water Well Drilling, Quarrying, Construction | Tungsten Carbide Buttons + Alloy Steel Body | Get a Quote | |
| R25 | R25 | DTH Button Bit | 25 mm spline drive shank | Mining, quarrying, water well drilling, construction | Alloy steel body with tungsten carbide buttons | Get a Quote | |
| R32 | R32 | DTH Button Bit | 64 mm - 102 mm (2.5" - 4") | Mining, Quarrying, Water Well Drilling | Alloy Steel Body with Tungsten Carbide Buttons | Get a Quote |
Compare 2–3 models? Tick the boxes and send them together — we will quote each one for you.
Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.
Not sure which model fits your project? Send us your working pressure and air demand — our engineers will recommend the right one.
Main Components
- Tungsten carbide buttons
- Alloy steel body
- Flushing holes
- Thread connection shank
- Button holes
- Grooves for cuttings removal
- Wear-resistant coating
- Identification markings
Working Principle
DTH (Down-The-Hole) drill bits operate by receiving impact energy from a down-the-hole hammer, which is driven by compressed air. The hammer's piston strikes the bit's shank, transmitting high-frequency impact forces to the tungsten carbide buttons. As the bit rotates, the buttons crush and cut the rock, creating a hole. The THREAD-OPENER-BITS are specifically designed with a tapered or stepped profile to enlarge pilot holes and clean threads for casing advancement. The flushing air, also from the hammer, travels through the bit's flushing holes to remove cuttings and cool the bit. The combination of impact, rotation, and flushing ensures efficient rock breakage and hole cleaning. The thread opening feature allows the bit to ream the hole to the required diameter while preparing the thread profile, enabling smooth casing installation. This design reduces the need for separate reaming tools, saving time and cost.
Detailed Features
- ▸High wear resistance
- ▸Excellent impact toughness
- ▸Fast penetration rate
- ▸Long service life
- ▸Precise thread opening
- ▸Compatible with standard hammers
- ▸Easy to install and replace
- ▸Cost-effective drilling
Packaging & Shipping
Each Kaishan THREAD-OPENER-BIT is packed in a wooden case or carton with rust-proof protection, then secured on pallets for container shipment. Standard export packaging ensures safe transport. We ship from major Chinese ports such as Shanghai, Qingdao, or Tianjin. Delivery time is typically 15-30 days after order confirmation, depending on quantity and destination. For urgent orders, expedited shipping can be arranged.
After-Sales Service
Kaishan offers a 12-month warranty on THREAD-OPENER-BITS against manufacturing defects. Our 24-hour customer service team provides technical support and troubleshooting. We offer free training on bit selection, operation, and maintenance for bulk orders. A full range of spare parts and accessories is available for quick shipment. Our global network ensures timely after-sales support wherever you are.
Frequently Asked Questions
What is the purpose of a thread opener bit?+
A thread opener bit is used in DTH drilling to enlarge pilot holes and clean threads for casing advancement, ensuring smooth installation of casing pipes.
What materials are used in Kaishan THREAD-OPENER-BITS?+
They are made from high-grade tungsten carbide buttons and heat-treated alloy steel for durability and wear resistance.
Are these bits compatible with all DTH hammers?+
They are available with standard API threads and can be customized to fit most DTH hammers. Please specify your hammer model when ordering.
What sizes are available?+
We offer a range of diameters from 76mm to 305mm and can produce custom sizes upon request.
How do I maintain the bit for longer life?+
Regularly check for worn buttons and replace them if necessary. Ensure proper flushing air pressure and volume to avoid overheating. Store bits in a dry place.
What is the delivery time and shipping method?+
Delivery time is 15-30 days after order confirmation. We ship via sea freight from Chinese ports. Air freight is available for urgent orders.
Related Insights
Related Projects
Where This Machine Is Used
Is This Rig Right for My Project?
Answer seven questions about your hole, depth and rock — get a matched rig, compressor, hammer, bit and rod.
Need Technical Support?
Request information and get a quote from our engineers.
Recommended System
Rig + air compressor + drilling tools matched to your project. Get pre-matching advice from our engineers.
Recommended Equipment Configuration
Matched from real machine parameters — rig, compressor, hammer, bit and rod working as one system.
KAISHAN KL511
- Hole range
- 64–127
- Drilling depth
- 25 m
Why matched
Parameter-matched to the machine on this page.
K10
- Hole range
- 254–311
- Air flow
- 22–65 m³/min
- Working pressure
- 10+ bar
- Bit shank
- K10**
Why matched
Hole range 254–311 mm covers your requirement ?–? mm.
System requirement: 10 bar / 65 m³/min · ?–? mm
