Description
Product Introduction
This 7.5mm × 69 × 109mm straight shank Fried Dough Twists drill produced by VANGUARD INDUSTRIAL is a highly versatile standard hole processing tool:
Core parameters: The nominal diameter of the drill bit is 7.5mm, the effective working blade length is 69mm, and the total length of the drill bit is 109mm. It adopts a standard straight handle structure design and is suitable for most conventional drilling equipment such as handheld drills, bench drills, and drilling machines.
Structural advantages: The overall material is made of fully ground high-speed steel, with two optimized spiral chip removal grooves for smooth chip removal and easy blockage. The standard 118 ° top angle design has excellent centering performance and is not prone to deviation during drilling. The processed hole position accuracy is high, the hole wall is flat and smooth, the guidance is good, and the drilling axis is not easily skewed.
Applicable scenarios: Widely used for drilling operations on various common materials such as steel, cast iron, aluminum alloy, wood, plastic, etc., it is suitable for most conventional drilling scenarios such as mechanical processing, equipment maintenance, home decoration and installation, DIY handmade production, etc. It is a widely used basic drilling tool in both industrial and civilian fields.
🛠️ Usage
preliminary preparation
Mark the drilling points on the workpiece to be processed, punch a center sample punch hole to create positioning pits, and avoid the drill bit slipping and shifting during initial drilling; Clean the burrs and debris on the surface of the workpiece, firmly clamp and fix the workpiece to prevent displacement during the drilling process.
Clamping and debugging
Fully insert the straight shank of the drill bit into the drill chuck to ensure stable clamping without looseness. After clamping, confirm that the radial runout of the drill bit during rotation is controlled within a reasonable range to avoid problems such as large hole diameter and drill bit fracture caused by lack of concentricity.
Drilling operation
Adjust the corresponding speed according to the processing material: 600-900 revolutions per minute can be used for wood/plastic, 1800-2800 revolutions per minute can be used for ordinary steel. Align with the pre drilled positioning pit and smoothly drill down, maintaining a uniform and stable feed rate; When drilling metal materials, it is recommended to use corresponding cutting fluid for continuous cooling and lubrication to avoid overheating and annealing of the drill bit; When drilling deep holes, it is necessary to frequently exit the drill bit to clean the chips. When the drill bit is about to drill through the workpiece, adjust the feed rate appropriately to prevent the drill bit from being stuck and damaged by the chips.
Final maintenance
After drilling is completed, promptly clean the residual chips in the spiral groove of the drill bit, check the wear of the cutting edge, and grind the main and rear cutting surfaces according to the specifications in case of slight wear, ensuring that the two main cutting edges are symmetrical, which can greatly extend the service life of the drill bit; When stored for a long time, place the drill bit in a dedicated storage box to avoid collision and damage between the cutting edges.
Reviews
There are no reviews yet.