0.8mm Deep Hole Standard Mail 2.3mm Core 4-Piece Diamond Set Ultra-Fine Processing Drill Bit

0.8mm Deep Hole Fixed-Type Mail 2.3mm Shank Core 4-Piece Set Diamond Ultra-Fine Machining Drill Bit
Other listings: #OyaMondoCoreDrill
Product Description
Length: 42mm
Shank Core: 2.3mm
Machining Depth: 13mm
Quantity: 4 pieces
Suitable for hard materials such as metal, glass, gemstones, pearls, and tiles.
We prepared these because customers who purchased mini-routers and micro-drill bits were having trouble drilling hard materials, unable to center the drill bit, unable to use a center punch like with iron, and the drill bit tip was jumping and preventing them from drilling holes.
You can also use these for centering, drilling, and engraving hard gemstones and precious stones like glass and tiles. The short needle tip reduces tip runout, which positively impacts machining accuracy.
Use this bit to establish the center, then use a drill bit suitable for the material.
Diamond drill bits with ultra-fine tips and straight needle points have a low pass rate during manufacturing, making highly accurate ones very expensive tools. However, if you use them with water for cooling, they can be used for a long time.