Ultimax 646
The Diager Ultimax 646 redefines drilling excellence with its 10 cutting-edge technology and massive carbide head, delivering unmatched performance in hard and reinforced concrete.
- 10 cutting edges for faster drilling and extended tool life
- Massive carbide head ensures durability and heat resistance
- SDS Max compatibility for secure fit and maximum energy transfer
- Elliptical 130° angle tip for precise centering and accurate starts
- 6 lateral stabilizers reduce vibration for smoother operation
- High destruction power ideal for reinforced concrete drilling
- Low vibration design enhances user comfort during prolonged use
- Engineered for longer lifespan, offering excellent value for professionals
Materials



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Disclaimer: Please note that images or illustrations may differ from the actual products due to presentation reasons and are therefore non-binding. Technical changes and errors are excepted. For the most accurate information, contact our customer service team.
Introducing the Diager Ultimax 646: The Ultimate SDS Max Hammer Drill Bit for Demanding Construction Projects
When precision meets power, the result is the Diager Ultimax 646—a hammer drill bit engineered to tackle the toughest concrete and reinforced concrete drilling challenges with unmatched efficiency. Are you ready to experience a tool that combines cutting-edge technology with decades of French manufacturing expertise? Designed for professionals in Riyadh and Jeddah, this drill bit redefines performance and durability.
Key Features of the Diager Ultimax 646
- 10 Cutting Edges Technology: This innovative design ensures superior drilling performance by distributing wear evenly across all edges, allowing for faster penetration and extended tool life. Ideal for projects requiring repetitive drilling in hard materials.
- Massive Carbide Head: Built with high-grade carbide, the massive head offers exceptional resistance to heat and abrasion, making it perfect for drilling through reinforced concrete without compromising performance.
- SDS Max Compatibility: Engineered for use with SDS Max rotary hammers, this drill bit provides a secure connection, ensuring maximum energy transfer and reducing slippage during operation.
- Elliptical 130° Angle Tip: Designed for optimal centering and reduced walking, this feature ensures precise starts and accurate holes every time, even on rough or uneven surfaces.
- 6 Lateral Stabilizers: These stabilizers minimize vibration and wobbling, delivering smoother drilling and enhancing user comfort during prolonged use.
- Fast Drilling Speed: With its advanced geometry and carbide composition, the Ultimax 646 drills faster than traditional bits, saving valuable time on-site in Riyadh and Jeddah construction projects.
- High Destruction Power: Whether you’re working with reinforced concrete or other dense materials, this drill bit delivers the power needed to break through with ease.
- Heat Resistance: The combination of premium materials and intelligent design ensures the bit remains cool under pressure, preventing overheating and prolonging its lifespan.
- Low Vibration: Reduced vibration not only enhances operator comfort but also improves accuracy, making this drill bit ideal for intricate tasks.
- Longer Lifespan: Thanks to its durable construction and advanced features, the Ultimax 646 outlasts conventional drill bits, offering excellent value for money over time.
Ideal Use Cases for the Diager Ultimax 646
The Diager Ultimax 646 excels in demanding construction environments where precision, speed, and durability are paramount. It’s the go-to solution for:
- Drilling anchor holes in reinforced concrete structures in Riyadh and Jeddah.
- Installing heavy-duty fixtures such as beams, brackets, and supports in industrial settings.
- Performing demolition work that requires breaking through tough materials efficiently.
- Construction projects involving large-scale infrastructure like bridges, highways, and commercial buildings.
Whether you’re a contractor, engineer, or maintenance professional in Saudi Arabia, the Diager Ultimax 646 is your reliable partner for achieving consistent results under challenging conditions.

Sunday - Thursady
08:00 AM - 06:00 PM
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Technical Data
Product Label | Item Code | Ø (mm) | L Totale (mm) | L Utile (mm) |
---|---|---|---|---|
Ultimax 646 SDS Max 12×340 mm | 166D12L0340 | 12 | 340 | 200 |
Ultimax 646 SDS Max 12×540 mm | 166D12L0540 | 12 | 540 | 400 |
Ultimax 646 SDS Max 14×340 mm | 166D14L0340 | 14 | 340 | 200 |
Ultimax 646 SDS Max 14×540 mm | 166D14L0540 | 14 | 540 | 400 |
Ultimax 646 SDS Max 15×340 mm | 166D15L0340 | 15 | 340 | 200 |
Ultimax 646 SDS Max 15×540 mm | 166D15L0540 | 15 | 540 | 400 |
Ultimax 646 SDS Max 16×340 mm | 166D16L0340 | 16 | 340 | 200 |
Ultimax 646 SDS Max 16×540 mm | 166D16L0540 | 16 | 540 | 400 |
Ultimax 646 SDS Max 16×690 mm | 166D16L0690 | 16 | 690 | 550 |
Ultimax 646 SDS Max 16×920 mm | 166D16L0920 | 16 | 920 | 780 |
Ultimax 646 SDS Max 18×340 mm | 166D18L0340 | 18 | 340 | 200 |
Ultimax 646 SDS Max 18×540 mm | 166D18L0540 | 18 | 540 | 400 |
Ultimax 646 SDS Max 18×690 mm | 166D18L0690 | 18 | 690 | 550 |
Ultimax 646 SDS Max 18×920 mm | 166D18L0920 | 18 | 920 | 780 |
Ultimax 646 SDS Max 20×1300 mm | 166D20L1300 | 20 | 1300 | 1160 |
Ultimax 646 SDS Max 20×1500 mm | 166D20L1500 | 20 | 1500 | 1360 |
Ultimax 646 SDS Max 20×340 mm | 166D20L0340 | 20 | 340 | 200 |
Ultimax 646 SDS Max 20×540 mm | 166D20L0540 | 20 | 540 | 400 |

Diager: Pioneering Excellence in Drilling and Screwing Tools for Over 60 Years
Founded in 1953 by Pierre and Denise Defougères, Diager is an independent French manufacturer renowned for its expertise in drilling and screwing tools. With over 60 years of experience, Diager has established itself as the European leader in concrete drill bit production, serving professional customers in more than 70 countries.
Headquartered in Poligny, nestled in the picturesque Jura region of France, Diager produces an impressive twenty million items annually, offering a comprehensive range of professional accessories for power tools, including drilling, screwing, core drilling, and cutting tools for concrete, metal, and timber. Under the leadership of François Defougères, the family-run business is committed to maintaining a robust industrial presence in France and Europe, investing in production capabilities, staff training, and research and development to meet the evolving needs of its clients.
In 2013, Diager expanded its expertise by acquiring USH, a German screw tip manufacturer, further enhancing its product offerings. The company is also dedicated to sustainable development, implementing policies and actions that prioritize environmental protection. With a recent investment of 8.5 million euros to expand its production facility by 1,600m² and add ten new machines, Diager is poised to meet growing demand and improve delivery times, all while upholding its commitment to innovation and ethical values in the manufacturing sector.
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