30pcs diameter 0.8mm Gems Diamond Drill Bits Lapel Jewelry Engraving Hole Tool

Features: * Emery particles: using hard emery particles the drilling is neat/smooth/no broken edges *Even and full sand grains: sharp and wear-resistant/not easy to clog/accelerate chip removal increase drilling speed and effectively improve work efficiency * Complete specifications sharp and durable: specifications 0.8MM-2.5MM increase drilling speed effectively improve work efficiency * Applicable models: jade carving machine high-speed jade carving machine hanging mill electric mill *Scope of application: Suitable for engraving/drilling/polishing of jade/amber/beeswax/glass etc. Specification: Product name: Extended corundum jade punching needle Material: wear-resistant emery Shape: cylindrical grinding head Specifications: 0.8-2.5MM Particle size: 80 mesh Shank diameter: 2.35MM Sand length: 15mm Quantity: 30pcs Applicable models: jade carving machine high-speed jade carving machine hanging mill electric mill Packing list: 30*Jade punch needle Please note the following when using diamond tools 1. It must be cooled with water (resemblance dripping devices like hospital drips) such as dry drills the diamond on the tool head will be graphitized due to overheating and will soon wear out and be scrapped. 2. When drilling try to avoid shaking because shaking will cause local damage to the tool and accelerate the damage of the entire tool. 3. Speed as high as possible. Generally the line speed is not lower than 10 meters per second. 4. Feed with light pressure. Diamond tools process workpieces by grinding. If excessive force is used the grinding powder is not easy to remove and the tools (especially small tools) are easily damaged. Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.