Application technology and development

We concentrate not only on the development of individual screws, but also on the entire screw connection. Our focus is on complex and critical components and applications.

We specialize in the development of integrated and cost-efficient solutions.

Our experienced staff has in-depth expertise and works closely with universities to implement innovative projects.

To ensure the quality of our products, we use state-of-the-art testing equipment and methods. This enables us to guarantee the performance and reliability of our bolted joints.

Our company attaches great importance to goal-oriented cooperation at all stages of a project. We practice the concept of “co-makership”, in which we work closely with our customers and partners at an early stage of development. This enables us to develop customized solutions that are precisely tailored to our customers’ requirements.

To ensure that our customers receive the best possible support, we provide them with technical customer advisors. These experts are available on site to provide comprehensive support and advice. Through this personal attention, we can ensure that our customers receive the best possible technical support and that their requirements are optimally met.

We have an independent in-house development department that develops innovative fasteners from application-specific materials. Our focus is on developing products that meet the needs of the market.

An important principle of our company is “in-house production”. This means that we produce our fasteners ourselves in our own facilities. This gives us full control over the entire manufacturing process and ensures that our products meet the highest quality standards.

Competencies

ESKA is a competent and recognized development partner of the German automotive industry

• focused on complex, critical components and applications
• development of integrated, cost-efficient solutions
• high level of expertise, experienced employees (screwdriving engineers), cooperation and public projects with universities
• use of state-of-the-art testing equipment and methods

Development and application technology

• design of bolting cases according to customer requirements in accordance with VDI2230
• comprehensive on-site customer support by technical key account managers
• our principle: “We don’t develop a fastener, we develop an innovative connection!”

daily tasks

• application consulting, analytical calculation and design of bolted connections
• conceptual design in the pre-development phase with subsequent joint development up to the SOP
• initial drawings
• production of prototypes and samples
• experimental tests to determine key mechanical and functional data, parameters, preloads and their time-temperature curve temperature behavior
• application support for the start-up and series production phase

ZWICK® Z250 tensile/compression testing machine

• Evaluation of the static-mechanical properties of screws/sleeves under tension/compression, non-contact Evaluation of elongation using a video extensometer
• Fmax: 250 kN
• Special fixtures for testing complete bolts in accordance with ISO 898-1
• Evaluation of load/unload cycles on sleeves

TesT® friction test bench

• Determination of friction coefficients (total / head / thread) according to international customer specifications
• Drive system up to 250 rpm at 500 Nm
• 3 integrated force transducers: 25 kN / 30 Nm; 60 kN / 120 Nm; 200 kN / 500 Nm

Kistler® screw testing rig

• Evaluation of torque-angle curves and performance of all types of tightening operations (torque, torque + angle, yield point-controlled tightening)
• Torque-rotation angle, yield strength-controlled assembly on customer components from dummy connections to drive systems up to 500 rpm, Mmax: 200 Nm- 3 torque/angle sensors: < 5 Nm / < 50 Nm / < 200 Nm

Low resistance meter MI 3252 MicroOhm 100A

• Portable measuring device for measuring low-resistance values
• Adjustable test current from 100 mA to 100 A for measurements on electrical contact screw connections, particularly in the field of electromobility
• Accuracy of 0.25% of the reading value and with a resolution of up to 1 nΩ;

RSM401 UA (HWH) laboratory friction welding machine

• Friction welding of a wide variety of materials such as copper, aluminum, stainless steels, and many more.
• Calculation of friction cross-sections and design of the welding zone geometry.
• Conducting experimental welding tests to determine the limits and weldability.

Temperature chamber Vötschtechnik LabEvent T/210/70/5

• Test series under dynamic temperature stress between -70°C and +180°C
• Laboratory R&D / measurement technology – 200 l volume (630 x 650 x 540 mm3)
• For temperature change tests on screw connections and analysis of preload loss

Preload force measurements on original components

Intellifast ultrasonic measuring device (LoadProbe 3000b)

• Evaluation of preload on original components after tightening and mechanical/thermal stress
• High flexibility thanks to bonded piezo sensors (PI-Ceramic)
• Advantages: One-sided accessibility enables measurements on the original component

Preload force measurements on original components

Direct length measurement with Zeiss Calypso 3D coordinate measuring machine

• Advantages: No influence of possible structural changes on the measurement result

Preload force measurements on original components

Direct force measurement using force measurement rings up to 50 kN

• Advantages: quick measurement of the force level of bolted connections

High-frequency pulsator ZWICK® 100 HFP 5100

• Determination of the fatigue strength and fatigue life of screws
• Maximum average load: +/- 100 kN
• Maximum amplitude load: +/- 50 kN
• Test frequency depending on material and dimensions 35 – 300 Hz