Drill bit Proxxon PR28765, working length 0.5 mm, for metal, glass, tile, plastic (1 pc)

Proxxon PR28765 is a precision drill bit with a 0.5 mm working length designed for fine, controlled drilling in a variety of hard and brittle materials. Manufactured for use with engraving devices such as the GE 70 and compatible bench or hand-held drills, this single-piece bit is intended for tasks requiring a very small diameter and accurate drilling depth. The bit features a 60° nose angle for increased stability during cutting and a 3.2 mm cylindrical shank for secure clamping.

Advantages

The small 0.5 mm working length enables precise, fine-detail drilling and is suitable for producing narrow V-shaped letters with a base width of approximately 0.5 mm. The 60° nose angle improves cutting stability and reduces wandering on the work surface. A stainless-steel construction and cylindrical shank ensure reliable clamping and consistent performance when used in appropriate fixtures.

Suitable for

• Engraving and micro-drilling of glass and tiles
• Detail work on non-ferrous metals and steel in model making
• Drilling small holes in plastics and fine stoneware
• Creating V-shaped lettering and fine contours

Key specifications

• Working length: 0.5 mm
• Nose angle: 60°
• Shaft diameter (shank): 3.2 mm, cylindrical
• Material suitability: cast iron, fine stoneware, glass, non-ferrous metals, plastics, steel, tile
• Quantity: 1 piece

How to use

Secure the drill bit in a compatible chuck with a firm grip on the 3.2 mm cylindrical shank to prevent slipping. Use the bit in a bench or hand-held drilling machine designed for small-diameter tooling or in an engraving device such as the GE 70. Start at low to moderate speed, apply light, steady pressure and allow the tool to cut without forcing. For brittle materials such as glass, stoneware or tile, use appropriate cooling or lubrication if recommended by the machine manufacturer and support the workpiece to avoid vibrations and chipping.

Usage recommendations

Not suitable for freehand work without proper support and guidance. Use fixtures, depth stops or an engraving attachment to control drilling depth and position. Select speeds and feeds appropriate to the material: lower speeds and gentle pressure for glass and ceramics, moderate speeds for metals and plastics. Inspect the bit regularly and replace when worn to maintain precision.