Asphalt diamond blade designed for professional contractors carrying out asphalt and abrasive material cutting on UK highways and construction sites, intended for controlled performance in abrasive site conditions.
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Undercut protected segment design
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Designed for controlled performance on abrasive surfaces
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300mm × 20mm blade size
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8mm segment height
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EN13236 compliant
Asphalt Diamond Blade – Premium – 8mm Segment – Undercut Protected – 300x20mm – OTEC D20T
Asphalt diamond blade designed for professional contractors carrying out asphalt and abrasive material cutting on UK highways and construction sites, intended for controlled performance in abrasive site conditions.
-
Undercut protected segment design
-
Designed for controlled performance on abrasive surfaces
-
300mm × 20mm blade size
-
8mm segment height
-
EN13236 compliant
Asphalt Diamond Blade – Premium – 8mm Segment – Undercut Protected – 300x20mm – OTEC D20T developed specifically for cutting highly abrasive materials commonly encountered on UK road, highways, and infrastructure projects. It is engineered to deliver controlled, reliable cutting performance where abrasive surfaces accelerate steel core wear.
This blade is designed for professional contractors, highways teams, and groundworks operatives who require predictable wear behaviour and reduced downtime when cutting asphalt, green concrete, render, cement screed, and other abrasive construction materials. The undercut protected segment design helps minimise erosion of the steel core, supporting longer usable blade life in demanding site conditions.
The D20T is not intended for concrete, reinforced concrete, very hard materials, metal, or general-purpose site cutting. It should be specified specifically for asphalt-led applications where abrasive wear is the primary challenge.
Need a different size or even higher performance?
View the complete OTEC range, including the D20B - our super premium alternative asphalt blade.
✓ Undercut protected segment design to reduce steel core erosion
✓ Supports predictable blade life on abrasive road surfaces
✓ Maintains controlled cutting performance under regular site use
✓ Suitable for dry or wet cutting with appropriate cooling
✓ Directional blade design for correct and safe installation
Specifications Table – OTEC D20T
| Specification | Details |
|---|---|
| Product Name | Asphalt Diamond Blade – Premium – 8mm Segment – Undercut Protected 300x20mm – OTEC D20T |
| Product Code | D20T |
| Diameter | 300mm |
| Bore Size | 20mm |
| Segment Height | 8mm |
| Segment Type | Undercut protected |
| Primary Application | Asphalt |
| Secondary Application | Abrasive materials |
| Not Suitable For | Concrete, reinforced concrete, very hard materials, metal |
| Safety Standard | EN13236 |
| Max RPM | 6400 rpm |
| Use Environment | UK highways, roadworks, abrasive construction sites |
| Longevity / Wear Notes | Designed to reduce steel core undercutting in abrasive materials |
Variations Table – OTEC D20T
| Diameter | Bore | Max RPM | Variation Code |
|---|---|---|---|
| 300mm | 20mm | 6400 rpm | D20T |
! Max RPM must always be verified against machine rating before use.
Recommended Saw Type by Blade Size – OTEC D20T
| Blade Size | Bore | Recommended Saw Type | Typical Site Use |
|---|---|---|---|
| 300mm | 20mm | Petrol cut-off saw | Asphalt repairs, reinstatement & road maintenance |
The Asphalt Diamond Blade – Premium – 8mm Segment – Undercut Protected – 300x20mm – OTEC D20T is suitable for:
- Asphalt road and pavement cutting
- Highways maintenance and repair works
- Green concrete and early-age concrete surfaces
- Cement screed and render removal
- Abrasive concrete products such as roof tiles
Material Suitability Table – OTEC D20T
| Material Category | Typical Materials Included | Suitability |
|---|---|---|
| Metal | Exposed steel, RSJs, sheet metal, ductile iron pipe, rebar, fibreglass, plastic pipe | ❌ |
| Very Hard | Granite, engineering bricks, hard clay products, hard natural stone, very hard concrete | ❌ |
| Concrete | Limestone and flint aggregate, reinforced concrete, hard unabrasive concrete products | ❌ |
| General Purpose | Kerbs and slabs, medium hard bricks, yorkstone, concrete paviors | ❌ |
| Abrasive | Concrete roof tiles, sandstone, abrasive concrete paviors | ✔ |
| Asphalt | Asphalt, green concrete, render, cement screed, lignacite blocks | ✔✔✔ |
Before use:
Ensure the blade type and specification are suitable for the material being cut. Inspect for cracking, segment detachment, undercutting of the steel centre, uneven wear, or other defects. Confirm correct rotation direction and bore compatibility with the machine spindle. Wear appropriate PPE, including eye protection, and ensure guards are correctly fitted.
During use:
Do not apply excessive force. Allow the blade to cut at its designed speed and take regular cooling breaks. If overheating occurs, reassess material suitability. A blunt blade may be refreshed by cutting a soft abrasive material such as brick or block.
Wet cutting:
If wet cutting is used, ensure a continuous and adequate water supply to both sides of the blade.
Is the D20T suitable for concrete cutting?
No. The D20T is designed for asphalt and abrasive materials only and is not suitable for concrete or reinforced concrete.
What does “undercut protected” mean?
Undercut protected segments help reduce wear to the steel core when cutting abrasive materials, improving blade life and stability.
Can this blade be used on green concrete?
Yes. Green concrete and similar abrasive materials fall within the intended application range.
Is this blade suitable for continuous daily use?
The D20T is a Premium-range blade for regular professional use. For continuous daily asphalt cutting, a Professional-range asphalt blade should be specified.
Is the blade compliant for UK construction sites?
Yes. It is manufactured in accordance with EN13236, the recognised safety standard for diamond cutting blades used in the UK.
