Professional diamond core drill extension bar designed to extend drilling depth when using 1¼" UNC wet diamond core drills on UK construction and installation projects.
• 1¼" UNC connection
• 300mm extension length for increased drilling reach
• Designed for wet diamond core drilling systems
• Suitable for concrete, granite and marble drilling applications
• Heavy-duty steel construction for professional site use
• Compatible with most 1¼" UNC core drill motors and cores
• Ideal for deep service penetrations and structural drilling
• EN13236 compatible core drilling accessory systems
Diamond Core Drill Extension Bar – 1¼" UNC – 300mm – OTEC AC-N30
Professional diamond core drill extension bar designed to extend drilling depth when using 1¼" UNC wet diamond core drills on UK construction and installation projects.
• 1¼" UNC connection
• 300mm extension length for increased drilling reach
• Designed for wet diamond core drilling systems
• Suitable for concrete, granite and marble drilling applications
• Heavy-duty steel construction for professional site use
• Compatible with most 1¼" UNC core drill motors and cores
• Ideal for deep service penetrations and structural drilling
• EN13236 compatible core drilling accessory systems
- Buy 5 for £25.74 £21.45 each and save 13%
- Buy 10 for £21.00 £17.50 each and save 29%
| BULK DISCOUNT | 5 | 10 |
|---|---|---|
| Price | £21.45 £25.74 | £17.50 £21.00 |
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Log in to access trade discountsDiamond Core Drill Extension Bar – 1¼" UNC – 300mm – OTEC AC-N30 is designed to increase drilling depth when using wet diamond core drills in construction and installation environments.
The extension bar allows contractors to reach deeper drilling areas without changing equipment setup, making it suitable for service penetrations, structural drilling and installations where standard core lengths are insufficient. The 1¼" UNC connection ensures compatibility with a wide range of professional core drilling motors and diamond core drills.
Manufactured from durable steel, the extension bar provides stable power transfer during drilling operations while maintaining alignment between the motor and the core drill.
It is suitable for use when drilling materials such as concrete, granite and marble.
✓ Extends drilling depth for diamond core drilling applications
✓ Compatible with professional 1¼" UNC core drill systems
✓ Stable connection between drill motor and core barrel
✓ Suitable for deep drilling in construction environments
✓ Durable steel construction for site reliability
✓ Designed for professional drilling contractors
Specifications Table –Diamond Core Drill Extension Bar – 1¼" UNC – 300mm – OTEC AC-N30
| Specification | Details |
|---|---|
| Product Name | Diamond Core Drill Extension Bar – 1¼" UNC – 300mm – OTEC AC-N30 |
| Product Code | AC-N30 |
| Product Type | Diamond core drill extension bar |
| Connection Type | 1¼" UNC |
| Extension Length | 300mm |
| Primary Application | Extending drilling depth for diamond core drills |
| Compatible Materials | Concrete, granite, marble |
| Recommended Machine Type | Core drilling motors |
| Use Environment | UK construction and installation sites |
RECOMMENDED USE – EXTENSION BAR APPLICATIONS
| Application Type | Typical Use |
|---|---|
| Deep service penetrations | Plumbing, electrical and HVAC installations |
| Structural drilling | Reinforced concrete walls and slabs |
| Construction drilling | Core drilling through thick materials |
| Infrastructure installations | Utilities, telecoms and service routing |
Application:
The Diamond Core Drill Extension Bar – 1¼" UNC – 300mm – OTEC AC-N30 is suitable for:
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Extending diamond core drilling depth
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Concrete drilling applications
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Granite and marble drilling
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Mechanical and electrical installations
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Construction and infrastructure drilling projects
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Usage Guide:
Before use
Ensure the extension bar thread is clean and compatible with the core drill and drilling motor. Confirm the connection is fully tightened to maintain stable alignment during drilling.
During use
Operate the drilling motor with steady feed pressure and ensure the extension bar remains securely connected. Avoid excessive force that may affect alignment.
Wet cutting
When used with wet core drills, ensure water supply remains consistent to maintain cutting performance and reduce heat build-up.
What is a diamond core drill extension bar used for?
A diamond core drill extension bar increases the drilling depth when using diamond core drills. It allows contractors to drill deeper holes without changing the core drill or drilling motor setup.
What connection type does this extension use?
The AC-N30 extension bar uses a standard 1¼" UNC thread, which is widely used on professional core drilling equipment.
Can this extension be used with wet core drills?
Yes. The extension bar is designed to be used with wet diamond core drills and standard core drilling motors.
What materials are typically drilled using this extension?
It is commonly used when drilling concrete, granite, marble and other construction materials where deeper drilling reach is required.
Why buy diamond core drilling accessories from CMT Group?
Buying diamond core drilling accessories from CMT Group gives contractors reliable UK supply and procurement control for construction and infrastructure projects. The EDGE procurement portal helps manage tool purchasing across multiple sites while maintaining cost visibility.
CMT Group also supports contractors through SiteHive.ai automated stores and a dedicated UK fleet delivery network, helping ensure essential drilling equipment is available when needed while reducing downtime on site.
