Chuck adapter Rittal 4050.824 — chuck adapter for 4.1–5 mm drills, stainless steel

Rittal 4050.824 is a stainless-steel chuck adapter designed to accept drills with shank diameters from 4.1 mm to 5 mm. As an accessory for drill chucks, it provides a compact, corrosion-resistant sleeve that enables secure clamping of small-diameter bits. The adapter is intended for use in workshop and industrial settings where precise, repeatable holding of 4.1–5 mm drill shanks is required.

Advantages

The stainless-steel construction offers good corrosion resistance and dimensional stability under normal workshop conditions. Its narrow tolerance range for shank diameter provides reliable concentricity and reduces runout when used with a compatible chuck. Lightweight and simple in shape, the adapter facilitates quick bit changes and can improve the repeatability of drilling operations with small-diameter bits.

Suitable for

• Clamping drills with shank diameters of 4.1–5 mm
• Workshop drill presses and hand-held drills with compatible chucks
• Light industrial and maintenance drilling tasks requiring small-diameter holes
• Applications where corrosion resistance and dimensional stability are needed

When it may not be suitable

This adapter is not intended for drills with shank diameters outside the 4.1–5 mm range; attempting to use larger or smaller shanks can lead to poor clamping, slippage, or damage to the bit and chuck. It is also not a substitute for precision collets or toolholders required for high-precision machining on CNC machines where tighter tolerances and higher concentricity are necessary.

Key specifications

• Material: stainless steel
• Compatible shank diameter: 4.1–5.0 mm
• Quantity: 1 piece
• Intended use: adapter for drill chucks to clamp small-diameter bits

How to use

Insert the adapter into the drill chuck and tighten the chuck according to the drill manufacturer’s instructions. Then insert a drill with a 4.1–5 mm shank into the adapter and tighten the chuck until the adapter securely clamps the bit. Check concentricity and runout by rotating the drill at low speed before starting the operation. For safe and effective use, ensure the chuck and adapter are clean and free of debris, and avoid overtightening that could deform the adapter or bit shank.

What to consider before purchase

• Confirm that your drill chuck accepts the adapter’s outer dimensions and shape
• Verify the shank diameter of the drills you plan to use falls within 4.1–5.0 mm
• Consider whether higher-precision collets or toolholders are required for your application
• Assess compatibility with the rotational speeds and torque levels used in your drills

Usage recommendations

Use the adapter in clean, dry conditions and perform a test run at low speed after installing the bit. Replace the adapter if signs of wear, deformation, or corrosion appear. For repetitive, high-precision work consider using purpose-designed collets or holders matched to your machine.