SDS MAX adapter for core bits 450mm - Professional extension for demanding deep drilling
Are you looking for a reliable, robust and professional solution for drilling extremely deep holes in the hardest construction materials? The 450 mm SDS MAX core bit adapter is an indispensable tool for builders, plumbers, electricians, air conditioner installers and demanding DIYers. This premium extension allows you to easily, safely and effectively extend the reach of your core saws, opening the door to projects that were previously completely unattainable with standard equipment.
With an exceptional length of 450 mm and a universal standard M22 thread, this adapter is perfectly optimized for heavy-duty work in the most demanding materials such as concrete, brick and stone. Forget about drill bits that are too short, makeshift solutions and inefficient work on the construction site. With this professional SDS MAX adapter, you will make every breakthrough significantly faster, more precisely, safer and with minimal effort.

Key benefits of using the SDS MAX 450mm adapter

Extreme reach (450 mm): This high-performance adapter is used to extend core cutters to a working length of 450 mm. It is an essential tool wherever deep holes and penetrations through thick walls, concrete slabs, beams or solid foundations need to be made.
Perfect precision with pilot drill: The adapter is equipped with a high-quality pilot drill, which ensures stable and precise centering right from the start of drilling. This effectively prevents dangerous core slippage, vibrations and unwanted damage to the work surface.
Universal M22 thread: The standard M22 connection thread allows for extremely quick, easy and safe installation of most standard crown heads (core cutters) available on the market.
Professional SDS MAX chuck: Designed specifically for use with larger and extremely powerful rotary hammers with SDS MAX chuck. This ensures maximum and optimal power transfer from the machine to the core bit head without any losses or slippage in the machine head.


Technical specifications and product features
This robust adapter has been designed and manufactured to withstand the toughest of everyday construction jobs. Its premium steel construction ensures an exceptionally long service life, minimal flexing under full load, and high resistance to mechanical wear.

Machine clamping system: SDS MAX (suitable for heavy professional rotary hammers)
Total adapter length: 450 mm (ideal reach for deep walls)
Connection thread for crown heads: M22 (standardized thread for wide compatibility)
Accessories: Included centering pilot drill for precision work
Product code (SKU): S11045, G40045 or M22604
Product category: Screw bits and adapters
Price: €24.99


Why choose this adapter for your next construction projects?
When carrying out installation work, laying drainage and water pipes, installing ventilation systems or routing electrical cables, contractors are constantly faced with walls and partitions that far exceed the standard length of conventional core drills. The SDS MAX adapter for core drill heads 450mm offers a cost-effective and extremely practical solution to this problem. Instead of buying expensive, specialized and extremely long core drills, you simply and quickly extend your existing core drill head with an M22 thread.
Thanks to the included pilot drill bit, starting drilling is extremely easy and safe. The pilot drill bit first reliably makes a pilot hole, which then holds the entire heavy core bit and long adapter assembly in a perfectly straight line. When the core bit cuts into the material, the pilot drill bit ensures that the entire drilling operation is smooth, stable and without unnecessary, dangerous vibrations that could damage your power tool or the material.

Demonstration video of how it works in practice
See how easy, fast and efficient it is to work with our professional core bit adapter. The video below shows the correct installation, centering and practical use of the adapter in demanding drilling:
Click here to watch a video demonstration of the adapter on YouTube

Frequently Asked Questions (FAQ)
Which building materials is this adapter best suited for?
The 450 mm long SDS MAX adapter is intended for use with core bits for drilling into hard building materials such as concrete, reinforced concrete, classic brick, silicate brick, clinker, natural stone and other building blocks. The adapter itself ensures reliable transmission of torque and impact power, while the final drilling performance and speed depend on the quality and sharpness of the core bit used.
Is the centering pilot drill already included in the package?
Yes, the adapter is delivered in a set that already includes a pilot centering drill bit. The pilot drill bit allows you to center the drill bit extremely precisely at the desired drilling point and effectively prevents unwanted movement or slipping of the drill bit upon first contact with the material.
What kind of thread does this adapter use to mount hole saws?
This adapter uses the standard M22 thread, which is considered the most widespread and used standard for hole saws, core cutters and core drills on the market. Please check whether your core head supports the M22 connection thread before purchasing.


Responsible persons:
GEKO - GEKO SPÓŁKA Z OGRANICZNĄ ODPOWIEDZIALNOŚCIA SPÓŁKA KOMANDYTOWA, ul. Spacerowa 3, 97-500 Kietlin, Poland, (+48) 446824004, geko@geko.pl
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Insert the adapter into the SDS MAX hammer drill.
• Attach the appropriate crown head to the adapter.
• Check that everything is properly and securely attached.
• When drilling, guide the tool evenly and without excessive pressure.

Useful tips for work:
• Check the adapter and crown head for wear before use.
• Drill with particular care when drilling larger diameters due to higher loads.
• After use, clean and lubricate the SDS MAX bit.

Warnings:
• Switch off the hammer drill before changing the core bit.
• Use safety glasses, gloves and hearing protection.
• Do not use a damaged adapter.
• Do not use impact mode if the crown head or adapter is not designed for it.

Same summary

The SDS MAX adapter for 450 mm core bits is intended for users who need a robust and reliable connection between the power tool and the core bit for drilling larger diameters in harder materials such as concrete or masonry. Due to its universal use, it will be most appreciated by home craftsmen and those who occasionally tackle various projects on a construction site or during home renovation. The adapter is less useful for those who only need it for drilling into smaller materials or do not have a tool with an SDS MAX connection. It is important to consider the compatibility of the adapter with the specific tool and core bit, as this has a key impact on safety and the result of the work.

Recommendation source: Enaa guides and team experiences.

User view

This adapter is often used by users who regularly drill holes for pipes or cables through walls or carry out projects where larger crown heads are required. It is a practical solution for those who want to quickly and efficiently replace or use different crown head sizes without the need for special tools. It is important that users check the suitability of the attachment with their power tool before use, as the SDS MAX system is not compatible with all drills. Due to its multi-purpose orientation, the adapter allows greater flexibility in a variety of projects for both home craftsmen and professionals.

The Geko brand is recognized by users for its range of reliable adapters and attachments, which are appreciated for their practicality and wide compatibility with various tools.

Why buy at Enaa

At Enaa, you can quickly find the right adapter for your tool type, as the selection is clearly categorized in the category Screwdriver bits, drill bits and chisels for power tools. Users appreciate the professional support that helps them choose the right bit for a specific application. In addition, different brands are gathered in one place, where you can easily compare features and find the best balance between functionality and flexibility.

Answers to frequently asked questions

Is the SDS MAX adapter suitable for all crown heads?

The SDS MAX adapter is designed for use with most standard crown heads, but it is recommended to check the diameter and thread compatibility with the selected head before use.

What does the SDS MAX designation on an adapter mean?

SDS MAX refers to a type of chuck that is compatible with drills designed for heavier loads and working with harder materials such as concrete or stone. SDS MAX adapters are not suitable for tools with SDS PLUS or classic chucks.

How do I choose the right adapter for my crown head?

It is important to check the compatibility of the type of chuck on your tool (SDS MAX) and the dimension and thread of the crown head you want to use. In case of uncertainty, we recommend consulting a sales consultant.

Can the adapter be used with tools from other brands?

SDS MAX adapters, such as this model, are designed for universal use on tools with a compatible SDS MAX chuck, regardless of manufacturer. However, it is always important to check the specifications of the tool and adapter.

Is this adapter suitable for professional construction site use?

The SDS MAX adapter for core bits is suitable for both home and professional use, especially for tasks where durability and a secure connection between the tool and the core bit are required.

Description updated: April 2026