Product Specification

Custom High Quality Deep Hole Drilling Tool Step Gun Drill

Product Introduction

Key Features

Precision Step Design

• The step gun drill features a carefully engineered step design. This allows for the creation of holes with multiple diameters in a single drilling operation. For example, in a component that requires a larger diameter at one end and a smaller diameter at the other, the step drill can achieve this with high accuracy. The transitions between the steps are precisely machined to ensure a smooth and seamless connection. This precision is crucial in applications where fit and function are critical, such as in the manufacturing of engine parts, hydraulic cylinders, and precision machinery components. The step design also helps to reduce the number of tool changes and machining operations, saving time and increasing overall productivity.
• The steps are typically manufactured to tight tolerances, ensuring that the diameters and depths of each step meet the exact specifications of the workpiece. This level of precision is achieved through advanced manufacturing techniques and quality control processes.

High-Quality Material and Construction

• The drill is constructed from top-grade materials. The body of the step gun drill is usually made from a high-strength alloy steel that provides excellent rigidity and durability. This allows it to withstand the high axial forces and torsional stresses that occur during deep hole drilling. The cutting edges are made from high-speed steel or carbide, depending on the specific application. Carbide cutting edges offer superior hardness and wear resistance, enabling them to maintain their sharpness for longer periods, especially when drilling tough materials like hardened steels or exotic alloys. The surface finish of the drill is carefully controlled to minimize friction and heat generation. A smooth surface helps to improve chip evacuation and reduces the risk of tool wear and workpiece damage.
• The manufacturing process of the step gun drill involves strict quality control measures to ensure that each drill meets the highest standards of performance and reliability.

Efficient Chip Evacuation

• An efficient chip evacuation system is a key feature of the step gun drill. It is equipped with a coolant hole that runs through the center of the drill. The coolant, which can be a cutting oil or a water-soluble emulsion, is pumped at high pressure through this hole and directed to the cutting edges. The coolant serves multiple purposes. It cools the drill and the workpiece, preventing overheating and maintaining the integrity of the cutting edges. It also lubricates the cutting process, reducing friction and improving the surface finish of the hole. The high-pressure coolant helps to flush the chips away from the cutting zone and out of the hole. The flute design of the drill is optimized to facilitate the smooth flow of chips along with the coolant. The combination of the coolant system and the flute geometry ensures that chips are effectively removed, preventing chip clogging and tool breakage.
• The efficient chip evacuation system allows for continuous drilling operations, increasing productivity and reducing downtime.

Versatility in Material Drilling

• The step gun drill is highly versatile and can be used to drill a wide range of materials. It is effective in drilling common metals such as steel, stainless steel, aluminum, and copper. When drilling steel, it can handle different grades and hardness levels, from mild steel to high-strength alloy steels. For stainless steel, it can overcome the challenges of the material's toughness and corrosion resistance. In the case of aluminum, the drill's flute geometry and cutting edge sharpness are optimized to prevent chip adhesion and ensure smooth drilling. It can also be used for drilling other materials like cast iron, brass, and some composite materials, depending on the specific drill configuration and cutting parameters.
• This versatility makes the step gun drill suitable for a variety of industries, including aerospace, automotive, machinery manufacturing, and more.

Specification Details

• Application	nonferrous metals, Synthetic Materials & Graphite, Steel, iron, copper, aluminium, bronze, brass, plastic, aluminum alloy
  Drill Type	Carbide-tipped
  Shank Type	Whistle Notch
  Point Angle	142°, 118°, 144°, 135°, 140°, customized
  Surface Finish	High Temp/Hardness AlTiN, Multilayer TiCN/TiN, Bright(Uncoated), Diamond, Super Life TiAlN
  Customized support	OEM, ODM, OBM
  Product name	brazed gun drill
  Minimum dia	2mm
  Maximum dia	50mm
  Meterial	Carbide tip
  Size	As customers required
  Usage	Deep hole drilling
  Coating	Available
  Drill type	single-fluted gun drill
  OEM & ODM	Accpected
  Drill bar material	Steel

Application Scenarios

• In the aerospace industry, it is used for drilling holes in turbine blades, where stepped holes are often required for cooling channels or mounting purposes.
• The automotive industry utilizes the step gun drill for manufacturing engine blocks and cylinder heads, creating holes with different diameters for various components such as valves and fuel injectors.
• In the machinery manufacturing sector, it is essential for drilling holes in spindles, gears, and housings, where complex hole geometries are needed for proper assembly and function.
• It can also be applied in the oil and gas industry for drilling holes in drill bits and other downhole tools with stepped diameters.

Installation and Maintenance

• Installation: The step gun drill is installed in a CNC machine or a dedicated deep hole drilling machine following the manufacturer's instructions. The shank is properly inserted into the spindle and secured using the appropriate clamping mechanism. The coolant supply system is connected to the drill's coolant hole, ensuring a proper flow of cutting fluid.
• Maintenance: Regular inspection of the step gun drill is necessary. Check for signs of wear on the cutting edges, such as chipping or dulling. Inspect the coolant hole for any blockages and clean it if required. The drill should be stored in a clean and dry environment to prevent corrosion. Lubricate the shank and other moving parts as recommended by the manufacturer. If the drill shows significant wear or damage, it should be replaced or reconditioned to maintain optimal performance.

Conclusion