Selecting the correct asphalt diamond blade is critical for productivity, safety, and cost control on UK roadworks and infrastructure projects. While asphalt blades may appear similar, differences in segment height, blade range, durability, and machine compatibility can have a direct impact on performance and blade life.
This guide compares four OTEC asphalt diamond blades — D20, D20T, D20P, and D20B — to help contractors, highways teams, and procurement professionals choose the most suitable option for their specific site conditions.
Shared Application Scope (All Four Blades)
All blades in this comparison are purpose-designed for asphalt and highly abrasive materials.
NOT Suitable For
- Metal (Exposed steel, RSJ’s, sheet metal, ductile iron pipe, rebar, fibreglass, plastic pipe)
- Very hard materials (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)
Highly Suitable For
- Abrasive materials (Concrete roof tiles, sandstone, abrasive concrete paviors)
- Asphalt (Concrete roof tiles, sandstone, abrasive concrete paviors
Blade-by-Blade Comparison
1️⃣ OTEC D20T
- Seg. height: 8mm
- Size: 300x20mm
- Max RPM: 6400rpm
2️⃣ OTEC D20B
- Seg. height: 10mm
- Sizes: 300, 350, 450mm
- Feature: Extended life
3️⃣ OTEC D20
- Seg: 8/10mm (size dep.)
- Range: 300mm–450mm
- Compat: Petrol & floor saws
4️⃣ OTEC D20P
- Seg. height: 10mm
- Size: 300x20mm
- Max RPM: 6400rpm
Performance Progression
| Blade | Range Level | Best For |
|---|---|---|
| D20T | Premium | Standard repairs |
| D20B | Super Premium | Heavy-duty highways |
| D20 | Professional | Flexible multi-size |
| D20P | Pro Plus | Repetitive cutting |
OTEC Asphalt Diamond Blades Comparison Table
| Blade | Range Level | Segment Height | Available Sizes (Diameter × Bore) | Max RPM (by size) | Primary Application | Secondary Application | Not Suitable For | Recommended Saw Types | Typical Use Scenario |
|---|---|---|---|---|---|---|---|---|---|
| OTEC D20T | Premium | 8mm | 300x20mm | 6400 rpm | Asphalt | Abrasive materials | Metal, concrete, very hard materials | Petrol cut-off saw | Standard asphalt repairs & reinstatement |
| OTEC D20B | Super Premium | 10mm | 300x20mm / 350x25mm / 450x25mm | 6400 / 5400 / 3400 rpm | Asphalt | Abrasive materials & green concrete | Metal, reinforced concrete, very hard materials | Petrol cut-off saw, floor saw | Continuous roadworks & highways cutting |
| OTEC D20 | Professional | 8mm or 10mm (size-dependent) | 300x20mm / 350x20mm / 350x25mm / 400x25mm / 450x25mm | 6400 / 5400 / 3400 rpm | Asphalt | Abrasive materials & green concrete | Metal, reinforced concrete, very hard materials | Petrol cut-off saw, floor saw | Mixed site work with multiple machines |
| OTEC D20P | Professional Plus | 10mm | 300x20mm | 6400 rpm | Asphalt | Abrasive materials & green concrete | Metal, very hard materials, general masonry | Petrol cut-off saw | Frequent daily asphalt cutting |
Final Procurement Guidance
All four blades are EN13236 compliant and engineered for UK site conditions. Selection should be based on:
- Expected cutting volume
- Machine type (petrol saw vs floor saw)
- Required blade life
- Downtime tolerance
