38mm Spherical Teeth , Short Body , Tapered Drill Bit , Rock Drilling
Product Specifications
Diameter : 38mm
Body Length : 50mm
Tapered Degree : 11°
Carbide Size : 2*7mm, 6*8mm
Painting : ZINC (inner hole)
Carbide Brand : YK05
Steel Grade : 45CrNiMoVA
Hardness : HRC 45 ~ 52
Compatible Air Jack Hammers : Y18 , Y19 , Y20 , YT24 , TY24 , Y26 , YT27 , YT28 , YT29A , S250
Product Overview
Professional - grade tapered button drill bits deliver reliable rock-breaking performance for shallow hole drilling, blasting preparation , tunnel development and ground anchoring projects. Manufactured with premium alloy blanks and undergoing customized thermal hardening treatment , these top hammer rock tools achieve stable surface hardness , strong impact resistance and extended service life in diverse geological environments.
Engineered with a streamlined short taper sleeve structure , our rock drill bits reduce overall tool weight significantly. The optimized structural design simplifies on - site replacement procedures , allowing field workers to complete bit installation and removal in less time. It is important to note that this series is purpose - built for shallow and medium - depth borehole tasks and is not suitable for ultra - deep drilling operations with extreme working pressure.
Size & Configuration Options
We offer highly flexible size and configuration options to match various rock drill equipment and site conditions. The bit diameter covers 30mm to 50mm , supporting common taper gradients including 4°46′ , 6° , 7° , 11° , and 12°. Fully compatible with mainstream Hex22 and Hex25 shank tapered drill rods , these bits fit most standard pneumatic rock drills used in quarrying and underground mining. To support large - scale engineering projects , our factory maintains stable mass production capacity , with a maximum monthly output of 50000 units , ensuring timely bulk order delivery.
Customers can freely select button quantities ranging from 4 to 9 carbide teeth according to rock hardness requirements. Among all configurations , the 7 - button tapered bit stands out for its balanced performance , making it the most widely adopted option for conventional pneumatic drilling and shallow blasting hole construction across global mining sites.
Carbide Button Types & Applications
Our popular 11° short - body tapered drill bits support interchangeable carbide button types , enabling targeted adaptation to different rock formations and maximizing drilling efficiency. Each tooth profile is professionally optimized for specific geological conditions :
- Spherical Carbide Buttons : Engineered for tough working scenarios with hard and highly abrasive rock layers such as granite and quartzite. This tooth type features exceptional wear resistance and anti - crack performance, effectively avoiding tooth peeling and rock impact damage during long - duration drilling.
- Parabolic / Semi - Ballistic Buttons (Type D) : The universal standard solution for most mining operations. Ideal for medium - hard strata including limestone and compacted sandstone , it balances steady drilling speed and durable abrasion resistance , delivering consistent comprehensive performance for daily mining drilling tasks.
- Bullet Ballistic Buttons : Boasts superior rock-breaking penetration and faster drilling progress. Perfect for medium - hard rock and fractured jointed rock formations. Most bullet - tooth drill bits are equipped with central positioning teeth to enhance drilling stability and straightness.
- Conical Pointed Buttons (Type Z) : Designed exclusively for low - strength working conditions , including soft rock , weathered bedrock and fragile shale layers. This tooth structure is not impact - resistant enough for hard rock environments and is prone to tip breakage , so it is not recommended for high - hardness drilling scenarios.
The 11° taper model remains our best - selling specification for global mining and infrastructure clients. Its optimized taper angle provides ideal rod - bit clamping tension , avoiding excessive locking or loose connection issues. The moderate assembly difficulty greatly improves field construction efficiency and reduces tool maintenance time.
In practical field comparison , tapered button bits outperform traditional flat - head and cross - head rock drill bits in overall technical maturity and working stability. The upgraded manufacturing process extends single-use drilling mileage , reduces frequent tool replacement , and greatly improves overall construction efficiency. This substantial performance advantage makes carbide button rock bits the preferred drilling tool for professional contractors worldwide.
Application Scenarios
Our full - series tapered drilling tool sets mainly consist of tapered button bits and matched tapered drill rods , covering two mainstream bit types : button tooth and flat tooth styles. These industrial-grade drilling consumables are perfectly compatible with standard rock drilling rigs , water well drilling equipment and oilfield auxiliary machinery.
Widely deployed in quarry rock drilling , mine blasting hole punching, coal mine roadway development , highway foundation construction , dam infrastructure engineering and various civil blasting projects , these versatile rock tools provide cost - effective and high - reliability drilling solutions for diverse geotechnical construction operations.
