Proxxon flat shank bit 1/4" 4 x 33 mm PR23737 for rotary tools and drills

Proxxon flat shank bit PR23737 with a 1/4" (6.35 mm) shank and a 4 x 33 mm working section is a compact accessory for rotary tools, micro-drills and flexible shafts. It is intended for light shaping, grinding, cutting and finishing operations where precise control and access to small areas are required. The bit's metal construction is designed to withstand repeated use in model making, hobby work and small workshop tasks while maintaining dimensional stability and a secure fit in standard 1/4" chucks and collets.

Advantages

The flat shank design provides reliable seating in 1/4" tool holders and reduces the risk of slippage during precision work. The 4 x 33 mm working size balances reach and stiffness for controlled material removal and finishing. Durable metal construction ensures resistance to wear under normal hobby and light professional use. The compact profile suits detailed tasks and tight spaces common in model making and small repairs.

Suitable for

• Precision hobby and model making
• Light shaping and grinding on wood, plastics and soft metals
• Cutting and finishing small workpieces
• Use with rotary tools, micro-drills and flexible shafts
• Small workshop maintenance and repair tasks

Key specifications

• Shank diameter: 1/4" (6.35 mm)
• Working dimensions: 4 x 33 mm
• Material: metal construction for durability
• Compatibility: rotary tools, micro-drills and flexible shafts accepting 1/4" shanks
• Profile: flat shank for secure seating

How to use

Insert the 1/4" shank into a compatible chuck or collet and tighten according to the tool manufacturer's instructions to ensure a secure fit. Start at low speed to check alignment and balance, then adjust rotational speed to suit the material and the specific task. Apply light, steady pressure and allow the bit to perform the cutting or grinding; avoid forcing the bit to prevent overheating or premature wear. After use, clean metal debris from the working surface and store the bit in a protective holder to preserve its shape.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and dust extraction when cutting or grinding. Select speed and feed rate suitable for the work material — lower speeds for heat-sensitive plastics and higher speeds for efficient metal removal within the bit's intended light-duty range.