Drill bit manufacturing standards at TIVOLY: quality at all costs!

# Drill bit manufacturing standards at TIVOLY: quality at all costs !

The precision tooling industry, especially the drill industry, is governed by a strict set of standards that aim to ensure the quality, safety, and efficiency of the tools produced. At TIVOLY, a major player in this sector, compliance with these standards is not only a legal obligation, but a real corporate philosophy: quality at all costs. This article explores the most important standards that govern the manufacture of drill bits at TIVOLY, focusing on the rationale for these standards, the constraints they impose, and the methods used to rigorously comply with them.

# DIN 338: For cylindrical shank drills, short series

The DIN 338 standard defines the technical specifications for short-series cylindrical shank drills, which are among the most widely used drills in various industrial and domestic applications. These drill bits are designed to provide an optimal balance of strength and flexibility, allowing for precise drilling in a wide variety of materials, including steels, light alloys, and plastics.

# Constraints of DIN 338 :

Choice of drill: opt for an HSS-Co cobalt drill bit, which is particularly effective for the DIN 338 standard, imposes strict tolerances in terms of diameter, total length, and cutting length. For example, for a 10 mm diameter drill bit, the tolerance on the diameter must be extremely low to ensure drilling accuracy. In addition, concentricity and shank alignment are critical parameters that influence the performance of the drill bit. Compliance with these criteria is essential to avoid phenomena such as off-center or breakage of the drill bit 

# The importance of compliance with DIN 338 :

Compliance with DIN 338 is crucial because it ensures that each drill bit produced meets the performance requirements expected by both professional and amateur users. By ensuring precise tolerances, Tivoly enables its customers to make precise holes, reducing the risk of failure or damage to the materials being worked.

# DIN 340: For cylindrical shank drills, long series

The DIN 340 standard governs the manufacture of long-series cylindrical shank drills. These drills are particularly used for deep drilling, where extra length is required to reach hard-to-reach areas.

Constraints of DIN 340 :

One of the main challenges for DIN 340 drill bits is to maintain sufficient stiffness despite their increased length. The requirements in terms of concentricity and straightness are even stricter to avoid deviation during deep drilling. The overall length and usable length are precisely defined for each drill diameter, ensuring uniform performance.

The importance of compliance with DIN 340 :

Long drill bits are subject to greater torsional and bending forces, which can lead to breakage if not manufactured to exacting standards. By adhering to the DIN 340 standard, TIVOLY ensures that its long drill bits are able to withstand mechanical stress, providing increased durability and reliability during deep drilling operations.

# DIN 345: for walrus taper shank drills

The DIN 345 standard specifies the dimensions and tolerances for walrus taper shank drills. These drill bits are mainly used in heavy industrial applications, where high stability is required to drill hard materials.

Constraints of DIN 345 :

Walrus taper shank drills must meet strict requirements in terms of taper and fit. The standard imposes tolerances on the angle of the tapered shank, the length of the shank, and the concentricity between the shank and the cutting part of the drill. The geometry of the cutting edges must also be optimized to reduce cutting forces and minimize wear.

The importance of compliance with DIN 345:

Compliance with DIN 345 is essential to ensure that Morse taper shank drills fit perfectly into machine tool chucks, ensuring optimal torque transmission and maximum stability when drilling. This results in reliable performance, even under severe machining conditions, and extended tool life.

# DIN 1869: for cylindrical shank drills, extra-long series

The DIN 1869 standard applies to extra-long series cylindrical shank drills used for drilling operations requiring exceptional reach. These drills are crucial in industries like aeronautics, where the drilling depth is sometimes extreme.

Constraints of DIN 1869 :

Extra-long drills must not only be perfectly straight, but also have a high flexural strength. The DIN 1869 standard defines very tight tolerances on the straightness and stiffness of the drill bit to avoid any risk of deviation or breakage during drilling. In addition, the geometry of the cutting edges must be precisely controlled to minimize vibration and deformation. 

The importance of compliance with DIN 1869 :

In critical applications where very deep holes are required, the reliability of extra-long drills is non-negotiable. By strictly adhering to DIN 1869, TIVOLY assures its customers that its drills can reach considerable depths without compromising precision or safety, even in difficult-to-work materials.

# DIN 1897: for cylindrical shank drills, extra-short series

The DIN 1897 standard specifies the characteristics of extra-short series cylindrical shank drills. These drill bits are mainly used in applications where rigidity is more important than drilling depth.

Constraints of DIN 1897 :

Extra-short drill bits must provide maximum rigidity to resist torsional forces and minimize the risk of bending or breakage. The standard imposes strict tolerances on overall length, diameter and concentricity. The cutting edges must be particularly sharp to ensure an efficient cut with a minimum of force.

The importance of compliance with DIN 1897 :

Drills that comply with DIN 1897 are essential for precise and fast drilling in materials where a longer drill length would not be advantageous. By guaranteeing the quality of its extra-short drills, TIVOLY allows its customers to benefit from increased productivity and a reduction in costs related to tool breakage or drilling defects.

# DIN 6537: For solid twist drills made of carbide metal with cylindrical shank

The DIN 6537 standard applies to one-piece twist drills made of hard metals, with a cylindrical shank. These drill bits are specially designed for high-precision machining operations in very hard materials such as hardened steel. 

Constraints of DIN 6537 :

Drill bits made of hard metal must have exceptional resistance to wear and heat. DIN 6537 imposes extremely tight tolerances on cutting edge geometry, concentricity and straightness to ensure a precise and durable cut. The length of the drills and the depth of the flutes must also be optimized to allow efficient chip evacuation. 

The importance of compliance with DIN 6537 :

Compliance with DIN 6537 is essential to ensure the performance of drills made of hard metals, which are often used under extreme machining conditions. By strictly adhering to this standard, Tivoly assures its customers that its drill bits offer exceptional accuracy and durability, even in demanding applications.

# DIN 6539: For solid drills made of carbide metal with cylindrical shank

DIN 6539 is similar to DIN 6537, but is for solid drill bits made of hard metals with different specifications suitable for other specific applications.

Constraints of DIN 6539 :

As with DIN 6537, drills that comply with DIN 6539 must meet strict criteria in terms of dimensional tolerances and geometry. The materials used must be of the highest quality to withstand wear and tear, and the cutting edges must be designed to optimize cutting in harsh conditions.

The importance of compliance with DIN 6539 :

By adhering to DIN 6539, Tivoly ensures that its solid hard metal drill bits can be used in a wide range of industrial applications, providing optimal performance, consistent accuracy, and exceptional longevity.

At TIVOLY, compliance with manufacturing standards such as DIN 338, 340, 345, 1869, 1897, 6537 and 6539 is not simply a matter of regulatory compliance. This is a real promise of quality to its customers. Each standard imposes strict requirements that aim to ensure the performance, safety and durability of drill bits. By strictly adhering to these standards, TIVOLY ensures that every drill bit produced lives up to the highest expectations, whether for heavy industrial applications or precision work in demanding materials. 

Quality at all costs is also a philosophy that guides every step of the manufacturing process at TIVOLY, from the selection of materials to the final inspection. With this approach, TIVOLY continues to position itself as a leader in the cutting tool market, offering its customers products that combine innovation, performance and reliability.