π¦ DTH Drill Bits
Kaishan K50 DTH Drill Bit for Mining & Water Well
Model: K50
The Kaishan K50 DTH drill bit is a high-performance down-the-hole button bit engineered for demanding mining, quarrying, and water well drilling. Designed with a 5-inch (127 mm) shank and compatible with industry-standard DTH hammers, the K50 delivers fast penetration rates and long service life in hard rock formations. Its carbide buttons are precision-pressed and brazed into a robust alloy steel body, ensuring excellent wear resistance and impact toughness. The K50 is available in flat face, convex face, and concave face designs to suit various rock conditions. With optimized flushing holes for efficient cuttings removal and a precision-machined spline drive, this bit minimizes energy loss and maximizes drilling efficiency. Whether you are drilling blast holes in open-pit mines or constructing water wells, the Kaishan K50 offers reliable performance, reduced downtime, and lower cost per meter. Backed by Kaishan's global service network and strict quality control, it is the ideal choice for contractors seeking productivity and durability.
Technical Specifications
| Model | K50 |
| Type | DTH Drill Bit (Button Bit) |
| Size | 5 inch (127 mm) shank, 130-140 mm diameter |
| Application | Mining, quarrying, water well drilling, construction |
| Material | Alloy steel body with tungsten carbide buttons |
| Weight | Approx. 15-18 kg |
| Packing | Wooden case or carton, palletized for export |
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
Approx. 15-18 kg
Model
K50
Type
DTH Drill Bit (Button Bit)
Size
5 inch (127 mm) shank, 130-140 mm diameter
Application
Mining, quarrying, water well drilling, construction
Material
Alloy steel body with tungsten carbide buttons
Packing
Wooden case or carton, palletized for export
Not sure this model fits? Tell us the hole diameter and depth β we will confirm the matching rig, compressor and hammer.
Check with an engineerKey Advantages
5-inch (127 mm) DTH drill bit for mining and water well drilling
Premium tungsten carbide buttons for high wear resistance
Precision-machined spline drive for efficient energy transfer
Optimized flushing holes for fast cuttings removal
Available in flat, convex, and concave face designs
Heat-treated alloy steel body for extended service life
Compatible with standard DTH hammers and drill pipes
Strict quality control and global after-sales support
Applications
π Open-Pit Mining
Blast hole drilling in hard rock such as granite and basalt.
Solution: Kaishan K50 DTH bit with convex face and high-grade carbide buttons ensures fast penetration and long life, reducing drilling cost per meter.
π Quarrying
Drilling blast holes in limestone and sandstone for aggregate production.
Solution: The K50's optimized flushing holes and robust body minimize regrinding and breakage, maximizing productivity in abrasive rock.
π Water Well Drilling
Constructing water wells in medium to hard formations.
Solution: The K50 provides straight hole deviation control and reliable performance, ensuring efficient water well completion.
π Construction & Foundation
Drilling anchor holes and foundation piling in rock.
Solution: With its precision spline drive and durable design, the K50 delivers consistent results in confined spaces and challenging conditions.
Similar Models in This Category
This model is unique in its series β here are similar models from the same category.
| β | Model | Model | Type | Size | Application | Material | Inquire |
|---|---|---|---|---|---|---|---|
| K50This model | K50 | DTH Drill Bit (Button Bit) | 5 inch (127 mm) shank, 130-140 mm diameter | Mining, quarrying, water well drilling, construction | Alloy steel body with tungsten carbide buttons | Get a Quote | |
| K10 | K10 | DTH Drill Bit (Down-the-Hole Button Bit) | 90β130 mm diameter (customizable) | Mining, quarrying, water well drilling, construction | Alloy steel body with tungsten carbide buttons | Get a Quote | |
| K3 | K3 | DTH Drill Bit | 76mm - 152mm | Mining, Quarrying, Water Well Drilling | Alloy Steel with Carbide Buttons | Get a Quote | |
| K30 | K30 | DTH Button Bit | 76mm - 152mm (customizable) | Mining, Quarrying, Water Well, Construction | Alloy Steel Body with Tungsten Carbide Buttons | Get a Quote | |
| K4 | K4 | DTH Drill Bit | Ξ¦110 mm (standard); other sizes available | Mining, water well drilling, quarrying, construction | Alloy steel body with carbide button inserts | Get a Quote | |
| K40 | K40 | DTH Button Bit | 76mm - 152mm (3" - 6") | Mining, quarrying, water well drilling, construction | Alloy steel body with tungsten carbide buttons | Get a Quote | |
| K5 | K5 | DTH Button Bit | 130 mm - 152 mm diameter | Mining, quarrying, water well drilling, foundation engineering | Alloy steel body with tungsten carbide buttons | Get a Quote | |
| K6 | K6 | DTH Button Bit | 76mm - 152mm (3" - 6") | Mining, Quarrying, Water Well Drilling, Construction | Alloy Steel Body with Tungsten Carbide Buttons | Get a Quote |
Compare 2β3 models? Tick the boxes and send them together β we will quote each one for you.
Tip: select multiple models and click βInquire Allβ β 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 β our engineers will recommend the right one.
Main Components
- Carbide buttons
- Alloy steel body
- Spline drive shank
- Flushing holes
- Face configuration (flat/convex/concave)
- Retaining ring
- Chuck
- Wear sleeve
Working Principle
The Kaishan K50 DTH drill bit operates as part of a down-the-hole hammer system. Compressed air is fed through the drill pipe to the DTH hammer, which contains a piston that reciprocates at high frequency. The piston strikes the shank of the drill bit, transmitting impact energy to the carbide buttons. Simultaneously, the bit rotates slowly via the drill rig's rotation unit. The combination of impact and rotation causes the carbide buttons to fracture the rock through a combination of crushing and chipping. The flushing holes in the bit direct exhaust air to the hole bottom, lifting cuttings to the surface and cooling the bit. The spline drive ensures efficient torque transmission while allowing the bit to move axially for impact. This mechanism enables high penetration rates in hard rock with minimal energy loss.
Detailed Features
- βΈHigh penetration rate in hard rock
- βΈLong service life with premium carbide
- βΈPrecision spline drive for efficient torque transfer
- βΈOptimized flushing for fast cuttings removal
- βΈAvailable in multiple face designs
- βΈHeat-treated body for wear resistance
- βΈCompatible with standard DTH hammers
- βΈStrict quality control and testing
Packaging & Shipping
Each Kaishan K50 DTH drill bit is packed in a wooden case or carton with rust-proof protection, then secured on a pallet for shipment. Standard export packaging ensures safe transport by sea or air. For bulk orders, bits are loaded into 20ft or 40ft containers. Delivery time is typically 15-30 days after order confirmation, depending on quantity. Shipping ports include Ningbo, Shanghai, or as per customer request.
After-Sales Service
Kaishan provides a 12-month warranty on the K50 DTH drill bit against manufacturing defects. Our global service team offers 24-hour technical support and spare parts supply. We provide on-site training for proper bit usage and maintenance to maximize performance. A full range of spare parts and accessories is available for timely replacement. Customers can rely on our worldwide distributor network for local support.
Frequently Asked Questions
What is the shank size of the Kaishan K50 DTH bit?+
The K50 features a 5-inch (127 mm) shank, compatible with standard DTH hammers.
What rock formations is the K50 suitable for?+
It is designed for medium to hard rock such as granite, basalt, limestone, and sandstone.
What face designs are available?+
The K50 is available in flat face, convex face, and concave face configurations.
What is the recommended air pressure?+
It operates efficiently with air pressure between 10-25 bar, depending on the hammer model.
How to choose the right bit for my application?+
Contact our technical team with your rock type and drilling conditions for a tailored recommendation.
What is the warranty period?+
We offer a 12-month warranty against manufacturing defects.
Related Insights
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Where This Machine Is Used
Is This Rig Right for My Project?
Answer seven questions about your hole, depth and rock β get a matched rig, compressor, hammer, bit and rod.
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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 β rig, compressor, hammer, bit and rod working as one system.
CDC-450J
- Hole range
- 105β350
- Drilling depth
- 450 m
Why matched
Parameter-matched to the machine on this page.
LGCY-19/21-21/18
- Working pressure
- 18 bar
- Air flow
- 19 mΒ³/min
Why matched
Covers the required 10 bar / 19 mΒ³/min air demand (rated 18 bar / 19 mΒ³/min).
K5
- Hole range
- 135β165
- Air flow
- 7β19 mΒ³/min
- Working pressure
- 10+ bar
- Bit shank
- K5** / COP54/DHD350
Why matched
Hole range 135β165 mm covers your requirement 140β178 mm.
System requirement: 10 bar / 19 mΒ³/min Β· 140β178 mm
