OTEC Diamond Blades
OTEC diamond blades are CMT Group's flagship cutting range, developed since 1992 and trusted by contractors across the UK for precision, durability, and consistent performance on real construction sites. Covering concrete, asphalt, stone, granite, ceramics, and mixed materials, the OTEC range provides a material-specific blade for every professional cutting application.
Read more Read less
Unlike generic diamond blades, every blade in the OTEC range is built around a specific material and cutting task, with segment design, bond hardness, and core engineering matched to the demands of that application. The result is better cutting speed, longer service life, and lower overall cost per cut for contractors who specify correctly.
- ✓ CMT Group's own brand, developed since 1992
- ✓ Material-specific blades for concrete, asphalt, stone and ceramics
- ✓ EN13236 compliant for professional construction site use
- ✓ Undercut protection on asphalt blades to reduce core wear
- ✓ Trusted on major UK infrastructure and construction projects
- ✓ Full range from handheld angle grinder to floor saw diameters
- ✓ Bulk supply with same-day and next-day UK delivery available
What Are OTEC Diamond Blades?
OTEC diamond blades are professional-grade cutting tools developed and supplied exclusively by CMT Group. The OTEC brand has been in continuous development since 1992, with investment in blade technology driving advances in segment design, bond formulation, and core construction that have made the range a trusted choice for tier one contractors on UK construction and infrastructure projects.
Each OTEC blade is engineered for a defined cutting task. Concrete blades use harder bond matrices to handle the density and aggregate of reinforced structural concrete. Asphalt blades use softer bonds and undercut protection to manage the abrasive, bituminous nature of road surfaces. Hard material blades are formulated for granite, engineering brick, and dense stone. This material-specific approach is what separates the OTEC range from generic multi-purpose blades, and is the reason OTEC blades consistently deliver better performance per cut in professional site conditions. All OTEC blades are manufactured to EN13236, the European safety standard for diamond tools used in construction.
OTEC Diamond Blades by Application
Every blade in the OTEC range is matched to a specific material or cutting task for optimum performance and service life.
Choosing the Right OTEC Blade
The most important factor in selecting an OTEC blade is the material being cut. Using a blade specified for the wrong material reduces cutting speed, accelerates segment wear, and increases cost per cut. For reinforced and structural concrete, hard bond blades such as the TX-series and DX models provide long service life and stable cutting under heavy load. For asphalt, the D20 range with undercut protection prevents the soft, abrasive material from wearing the blade core prematurely.
For contractors cutting across multiple material types on mixed sites, the D15T and D18P multi-purpose models reduce the need for blade changes while maintaining acceptable performance across varied materials. For very hard or specialist materials such as granite, engineering brick, porcelain, or natural stone, the correct specialist blade will significantly outperform a multi-purpose option in both speed and lifespan.
| Material | Recommended OTEC blade | Key specification note |
|---|---|---|
| Reinforced concrete | TX-series or DX05 concrete blade | Hard bond for density and aggregate load |
| Asphalt and road surfaces | D20 professional asphalt blade | Soft bond with undercut protection |
| Mixed materials, general site | D15T or D18P multi-purpose | Versatile performance, reduces blade changes |
| Granite and hard stone | Hard material specialist blade | Optimised segment for very hard abrasives |
| Ceramic and porcelain tiles | Continuous rim or turbo ceramic blade | Chip-free edge, wet cutting recommended |
| Stone (sandstone, limestone, slate) | Dedicated stone cutting blade | Matched to stone hardness and abrasiveness |
Professional Diamond Blades for UK Construction and Infrastructure
OTEC diamond blades are specified and used across construction, civil engineering, highways, and specialist cutting operations throughout the UK. The range covers every professional cutting requirement from structural concrete demolition and road surface cutting to precision stone fabrication and tile installation, with each blade developed to deliver measurable performance advantages over generic alternatives.
As the developer and exclusive supplier of the OTEC range, CMT Group supports contractors, procurement teams, and site managers with product selection, technical guidance, and the stockholding and delivery capability required to keep cutting operations running without delay. All OTEC blades are manufactured to EN13236, the European harmonised standard for diamond tools, providing assurance of safety and performance in professional use.
Frequently asked questions
What are OTEC diamond blades used for?
OTEC diamond blades are used for cutting hard construction materials including reinforced concrete, asphalt, stone, granite, brick, ceramics, and porcelain. They are used on petrol saws, floor saws, angle grinders, bench saws, and bridge saws across construction, civil engineering, highways, and specialist cutting applications.
What makes OTEC blades different from generic diamond blades?
OTEC blades are engineered specifically for defined materials and cutting tasks, with segment formulation, bond hardness, and core design matched to the demands of each application. This material-specific approach delivers better cutting speed, longer service life, and lower cost per cut compared to generic multi-purpose blades. The range has been developed since 1992 with continuous R&D investment by CMT Group.
Are OTEC diamond blades suitable for reinforced concrete?
Yes. The OTEC concrete blade range, including the TX-series and DX05 professional models, is specifically designed for reinforced and structural concrete. These blades use harder bond matrices to handle the density and rebar content of structural concrete, delivering stable cutting performance and long service life under heavy load conditions.
What is undercut protection on OTEC asphalt blades?
Undercut protection is a design feature on OTEC asphalt blades that prevents the highly abrasive material from wearing the steel core of the blade beneath the diamond segments. Without undercut protection, asphalt can erode the core from below the segment, causing early segment loss and blade failure. OTEC asphalt blades include protective elements in the segment design to prevent this, significantly extending blade lifespan when cutting road surfaces.
Are OTEC blades compliant with UK and European safety standards?
Yes. OTEC diamond blades are manufactured to EN13236, the harmonised European standard for diamond tools used in construction. EN13236 covers safety requirements including maximum operating speeds, marking, and quality control for diamond cutting tools. Compliance with this standard is required for professional construction site use in the UK and across Europe.
Why buy OTEC diamond blades from CMT Group?
CMT Group is the developer and exclusive supplier of the OTEC range, with direct control over product specification, stockholding, and supply. Buying OTEC blades direct from CMT Group means access to the full range, technical advice on blade selection, competitive pricing on bulk orders, and same-day and next-day delivery for urgent site requirements. CMT Group's team can advise on the correct OTEC specification for any cutting application.
Wet Cutting vs Dry Cutting Diamond Blades: What is the Difference?
Diamond blades can be designed for wet cutting, dry cutting, or both. Wet cutting uses a continuous flow of water to cool the blade during operation, reducing heat build-up, extending blade life, and suppressing dust at the cutting point. Wet cutting is typically used with bench saws, floor saws, and bridge saws where a water supply is practical, and is the preferred method for cutting ceramics, porcelain, and natural stone where heat can cause cracking or chipping.
Dry cutting is used where water supply is impractical, typically on handheld angle grinders and petrol saws on open construction sites. Dry-rated blades are designed to dissipate heat through gullets and segment design rather than water cooling, but they generate more dust and operate under greater thermal stress. Many OTEC blades are rated for both wet and dry use, giving contractors flexibility across different site conditions. For dust management on dry cutting operations, appropriate RPE (respiratory protective equipment) should always be used in compliance with COSHH regulations.
Accreditations and memberships
BSI ISO 9001:2015
Achilles Building Confidence
ConstructionOnline Gold
CHAS Elite
Avetta Member
Shop OTEC Diamond Blades by Application
OTEC Diamond Blades
OTEC diamond blades are CMT Group's flagship cutting range, developed since 1992 and trusted by contractors across the UK for precision, durability, and consistent performance on real construction sites. Covering concrete, asphalt, stone, granite, ceramics, and mixed materials, the OTEC range provides a material-specific blade for every professional cutting application.
Read more Read less
Unlike generic diamond blades, every blade in the OTEC range is built around a specific material and cutting task, with segment design, bond hardness, and core engineering matched to the demands of that application. The result is better cutting speed, longer service life, and lower overall cost per cut for contractors who specify correctly.
- ✓ CMT Group's own brand, developed since 1992
- ✓ Material-specific blades for concrete, asphalt, stone and ceramics
- ✓ EN13236 compliant for professional construction site use
- ✓ Undercut protection on asphalt blades to reduce core wear
- ✓ Trusted on major UK infrastructure and construction projects
- ✓ Full range from handheld angle grinder to floor saw diameters
- ✓ Bulk supply with same-day and next-day UK delivery available
What Are OTEC Diamond Blades?
OTEC diamond blades are professional-grade cutting tools developed and supplied exclusively by CMT Group. The OTEC brand has been in continuous development since 1992, with investment in blade technology driving advances in segment design, bond formulation, and core construction that have made the range a trusted choice for tier one contractors on UK construction and infrastructure projects.
Each OTEC blade is engineered for a defined cutting task. Concrete blades use harder bond matrices to handle the density and aggregate of reinforced structural concrete. Asphalt blades use softer bonds and undercut protection to manage the abrasive, bituminous nature of road surfaces. Hard material blades are formulated for granite, engineering brick, and dense stone. This material-specific approach is what separates the OTEC range from generic multi-purpose blades, and is the reason OTEC blades consistently deliver better performance per cut in professional site conditions. All OTEC blades are manufactured to EN13236, the European safety standard for diamond tools used in construction.
OTEC Diamond Blades by Application
Every blade in the OTEC range is matched to a specific material or cutting task for optimum performance and service life.
Choosing the Right OTEC Blade
The most important factor in selecting an OTEC blade is the material being cut. Using a blade specified for the wrong material reduces cutting speed, accelerates segment wear, and increases cost per cut. For reinforced and structural concrete, hard bond blades such as the TX-series and DX models provide long service life and stable cutting under heavy load. For asphalt, the D20 range with undercut protection prevents the soft, abrasive material from wearing the blade core prematurely.
For contractors cutting across multiple material types on mixed sites, the D15T and D18P multi-purpose models reduce the need for blade changes while maintaining acceptable performance across varied materials. For very hard or specialist materials such as granite, engineering brick, porcelain, or natural stone, the correct specialist blade will significantly outperform a multi-purpose option in both speed and lifespan.
| Material | Recommended OTEC blade | Key specification note |
|---|---|---|
| Reinforced concrete | TX-series or DX05 concrete blade | Hard bond for density and aggregate load |
| Asphalt and road surfaces | D20 professional asphalt blade | Soft bond with undercut protection |
| Mixed materials, general site | D15T or D18P multi-purpose | Versatile performance, reduces blade changes |
| Granite and hard stone | Hard material specialist blade | Optimised segment for very hard abrasives |
| Ceramic and porcelain tiles | Continuous rim or turbo ceramic blade | Chip-free edge, wet cutting recommended |
| Stone (sandstone, limestone, slate) | Dedicated stone cutting blade | Matched to stone hardness and abrasiveness |
Professional Diamond Blades for UK Construction and Infrastructure
OTEC diamond blades are specified and used across construction, civil engineering, highways, and specialist cutting operations throughout the UK. The range covers every professional cutting requirement from structural concrete demolition and road surface cutting to precision stone fabrication and tile installation, with each blade developed to deliver measurable performance advantages over generic alternatives.
As the developer and exclusive supplier of the OTEC range, CMT Group supports contractors, procurement teams, and site managers with product selection, technical guidance, and the stockholding and delivery capability required to keep cutting operations running without delay. All OTEC blades are manufactured to EN13236, the European harmonised standard for diamond tools, providing assurance of safety and performance in professional use.
Frequently asked questions
What are OTEC diamond blades used for?
OTEC diamond blades are used for cutting hard construction materials including reinforced concrete, asphalt, stone, granite, brick, ceramics, and porcelain. They are used on petrol saws, floor saws, angle grinders, bench saws, and bridge saws across construction, civil engineering, highways, and specialist cutting applications.
What makes OTEC blades different from generic diamond blades?
OTEC blades are engineered specifically for defined materials and cutting tasks, with segment formulation, bond hardness, and core design matched to the demands of each application. This material-specific approach delivers better cutting speed, longer service life, and lower cost per cut compared to generic multi-purpose blades. The range has been developed since 1992 with continuous R&D investment by CMT Group.
Are OTEC diamond blades suitable for reinforced concrete?
Yes. The OTEC concrete blade range, including the TX-series and DX05 professional models, is specifically designed for reinforced and structural concrete. These blades use harder bond matrices to handle the density and rebar content of structural concrete, delivering stable cutting performance and long service life under heavy load conditions.
What is undercut protection on OTEC asphalt blades?
Undercut protection is a design feature on OTEC asphalt blades that prevents the highly abrasive material from wearing the steel core of the blade beneath the diamond segments. Without undercut protection, asphalt can erode the core from below the segment, causing early segment loss and blade failure. OTEC asphalt blades include protective elements in the segment design to prevent this, significantly extending blade lifespan when cutting road surfaces.
Are OTEC blades compliant with UK and European safety standards?
Yes. OTEC diamond blades are manufactured to EN13236, the harmonised European standard for diamond tools used in construction. EN13236 covers safety requirements including maximum operating speeds, marking, and quality control for diamond cutting tools. Compliance with this standard is required for professional construction site use in the UK and across Europe.
Why buy OTEC diamond blades from CMT Group?
CMT Group is the developer and exclusive supplier of the OTEC range, with direct control over product specification, stockholding, and supply. Buying OTEC blades direct from CMT Group means access to the full range, technical advice on blade selection, competitive pricing on bulk orders, and same-day and next-day delivery for urgent site requirements. CMT Group's team can advise on the correct OTEC specification for any cutting application.
Wet Cutting vs Dry Cutting Diamond Blades: What is the Difference?
Diamond blades can be designed for wet cutting, dry cutting, or both. Wet cutting uses a continuous flow of water to cool the blade during operation, reducing heat build-up, extending blade life, and suppressing dust at the cutting point. Wet cutting is typically used with bench saws, floor saws, and bridge saws where a water supply is practical, and is the preferred method for cutting ceramics, porcelain, and natural stone where heat can cause cracking or chipping.
Dry cutting is used where water supply is impractical, typically on handheld angle grinders and petrol saws on open construction sites. Dry-rated blades are designed to dissipate heat through gullets and segment design rather than water cooling, but they generate more dust and operate under greater thermal stress. Many OTEC blades are rated for both wet and dry use, giving contractors flexibility across different site conditions. For dust management on dry cutting operations, appropriate RPE (respiratory protective equipment) should always be used in compliance with COSHH regulations.
Accreditations and memberships
BSI ISO 9001:2015
Achilles Building Confidence
ConstructionOnline Gold
CHAS Elite
Avetta Member
