Sandvik Coromant's huge leap in steel drilling

Safe and efficient hole machining is critical in today's machining environments, especially when machining large batches of holes. Productivity has become an important factor in ensuring manufacturing competitiveness.

Today, high-performance drills should not only have high penetration rates and predictable tool life, but must also maintain consistently high levels of processing results. In addition to the general capabilities, the drill bit should be based on the minimization of hole machining costs.

CoroDrill ^® 860 is a new and innovative cutting tool that takes steel material hole machining to a higher level of performance.

Now, how can the drill bit be truly efficient?

First, it is extremely important that the drill bit is dedicated to the specified workpiece material, and should also allow for higher cutting speeds and thus higher penetration rates. The ability to achieve consistent hole quality in a small tolerance zone (covering many hole types) and maintaining process safety over longer tool life - these are all critical attributes. In addition, there is a feature that is also essential: adaptable, easy to use, and have the potential for optimization.

Such drills naturally offer new opportunities to increase production efficiency levels, especially on modern high-profile machines. However, such drills must also have versatility for any machine tool that has sufficient spindle speed capability to take full advantage of the potential for high-speed cutting.

A universal drill bit is not sufficient to fully optimize mass production of holes of the same diameter. Current manufacturing requirements require modern, state-of-the-art drill concepts that range from cutting edges to chip flutes to a very high level. Twist drills seem to be the simplest basic tool, but the newly developed solid carbide drills have nothing in common with such drills, even with existing carbide drills.

The increase in production efficiency of hole processing depends to a large extent on higher penetration rates.
When using the CoroDrill 860 solid carbide drill, it is mainly achieved by higher cutting speed and process safety.
No trouble-free machining without unplanned downtime, and the tool is durable when drilling a large number of holes in a higher tolerance range.
This is part of the characteristics of making this type of drill a new generation of cutting tools.

What is the application range of the above drill bit?

The hole machining of steel material is suitable for improvement with a solid carbide standard drill bit with a pore size range of 3-20 mm and a depth of 3 to 8 times. Many of the holes here have tolerances of IT 8-9, surface roughness Ra 0.8 to 1.8 microns (depending on material and application), drilling 100mm depth straightness error between 0.07 and 0.12, and require inlet and outlet The burrs are small.

In addition to drilling simple holes in a flat and horizontal inlet/outlet surface, such drills must not have any limitations in dealing with most hole configurations, such as inclined inlet/outlet surfaces, convex and concave surfaces, holes that require chamfering. And cross holes. Such drills shall be suitable for use in materials within the ISO-P range and must have the versatility of efficient processing of all types of steel, including low carbon steel, unalloyed steel, high carbon steel, high alloy steel and hardness between 125 and 350 HB. Steel castings.

This new bit concept for steel processing is the result of new methods, high-level R&D work, and collaboration between different sectors of the manufacturing industry.
As a new generation of solid carbide drills, CoroDrill 860 establishes a high standard of competence in production. in many circumstances,
Its performance has exceeded user expectations, and it proves that it is the tool that needs to be improved in production now and in the future.

In many industrial fields, higher penetration rates and deeper drilling lengths can deliver tangible benefits when producing large quantities of parts. A new common benchmark is currently being set up, which will greatly enhance competitiveness and increase productivity by 100% or more. The new solid carbide drill concept delivers higher penetration and improved drill durability, so the machine shop can eliminate bottlenecks caused by outdated drilling capabilities in production.

Even if the bottleneck is not obvious, this new feature will reduce the total time required to machine parts. These drills are able to drill efficiently and safely from the start, which simplifies installation adjustments. Many tool change stops are reduced, and supervision is rarely required, even allowing unattended machining. Tool economy can also be improved by retrofitting equipment. Even in more varied productions, such drills represent one of the most advanced and efficient machining methods. The use of this drill allows for better use of the machine, allowing for higher cutting speeds and lower cutting forces.

The new drill bit also has tolerant properties that eliminate deficiencies in inefficient/unsatisfactory applications, especially in its primary application. Even if the application is a bit incorrect, it is always a trusted tool. This drill is designed for higher cutting speeds and is designed to be faster and safer for steel drilling. In contrast, the drill bit is not suitable for low cutting speeds, which can cause other performance and result problems.

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