ST58 Retrac Button Bits

1. Thread Type:

• The "ST" in ST58 typically refers to a specific thread type, but it's important to note that variations in thread standards may exist. The "58" denotes the diameter of the thread in millimeters. The thread type is crucial for compatibility with various drilling equipment, ensuring a secure and efficient connection.

• The retrac design is a distinctive feature of these bits. The cutting buttons on the bit are retractable, allowing them to adapt to changing rock hardness. This feature helps protect the buttons from excessive wear, contributing to increased bit lifespan.

Face Design	Application
	Flat face button drill bits are suitable for all rock conditions, especially for the rock with higher hardness and higher abrasiveness. Such as granite and basalt
	Convex Face button bits are designed for fast penetration rates in softer rock.
	Drop center button drill bits are mainly suitable for the rock with low hardness, low abrasiveness, and good integrity. The bits can drill straighter holes.
	Normal Skirt For drilling in very hard and abrasive rock formations.
	Retract Skirt For drilling in loose,broken or fissured rock where it is difficult to retract the drill string due to the hole collapse.

1. Button Configuration:

• ST58 retrac button bits are equipped with hard and durable buttons, typically made of materials like tungsten carbide. These buttons are strategically placed on the face of the bit for efficient rock penetration and breaking.

• ST58 retrac button bits are suitable for various drilling applications, including blast hole drilling, exploration drilling, and production drilling in medium to hard rock formations. They are commonly used in the mining and construction industries.

Button Shape
	R：Round Utility carbide shape. Stong configuration against carbide fracture.
	B:Ballistic Higher penetrating carbide shape than Semi ballistic shape. Recommended for soft rock.
	BB：Semi Ballistic Combined wear resistance and high penetration rate. Recommended for medium-hard rock with moderate abrasitivity.
	SA:Spike Highest penetrating carbide shape. Weak configuration against carbide fracture. Recommended for soft to medium-hard work.

1. Face Design:

• The face design of ST58 retrac button bits may include options such as flat face, drop center, concave, or convex designs. The choice of face design depends on specific drilling requirements and the type of rock being encountered.

• ST58 retrac button bits come in various sizes to accommodate different drilling requirements. The selection of the appropriate size depends on factors such as the desired hole diameter and the specific geological conditions of the drilling site.

Actual pictures of drill bits

  Threaded Drill Bits                Retrac Button Bits                   Reaming Drill Bits                  Cross Bit                                    Chisel Bit

Bit process flow

About US

Packing

1. Compatibility:

• ST58 retrac button bits are designed to be compatible with drilling equipment that uses ST58 threaded components. This includes drifter rods, extension rods, and rock drills with matching ST58 threads.

• Regular inspection and maintenance of ST58 retrac button bits are essential for optimal performance. Monitoring the condition of the cutting buttons and replacing them when worn are routine practices to maximize bit lifespan.

ST58 retrac button bits are known for their durability and efficiency in rock drilling operations. Proper selection, usage, and maintenance contribute significantly to the success of drilling operations in industries such as mining and construction.

 If you have any other questions, please do not hesitate to send us an inquiry. We will get back to you as soon as possible.