Application technology and development

Our company does not focus on the development of individual screws, but rather on a holistic evaluation of bolted joints in existing customer-specific applications. The focus is on complex and safety-critical components as well as their reliable implementation in stable processes.

We specialize in integrated and cost-effective solutions within the framework of existing product specifications and customer requirements. All services are provided based on customer-defined product specifications in accordance with a build-to-print approach.

Our qualified specialists possess extensive application engineering expertise and work closely with external partners such as universities and institutes to evaluate existing technologies and continuously improve them.

To ensure product and process quality, we use modern testing equipment and validated testing methods. This enables us to guarantee the performance and reliability of bolted joints under near-series conditions.

Our company places great importance on structured and goal-oriented collaboration throughout all project phases. In line with a partnership-based approach (“co-makership”), we support our customers at an early stage in selecting and applying suitable fastening elements within defined requirements. The goal is the optimal implementation of customer-specific specifications while considering quality, cost-effectiveness, and process reliability—without altering the customer’s product definition.

To provide the best possible support, we assign technical contacts who also assist our customers on-site. They ensure well-founded consulting, support implementation in applications, and contribute to maintaining stable processes.

We have internal departments dedicated to evaluating and optimizing fastening elements and their application conditions. The focus lies on the analysis, qualification, and continuous improvement of existing products and processes in line with market and customer requirements.

A key component of our strategy is manufacturing in our own production facilities. This ensures full control over all relevant processes and guarantees compliance with high-quality standards as well as traceability in accordance with applicable norms and standards.

ESKA is a competent and recognized partner of the German automotive industry for application engineering solutions in the field of bolted joints.

The focus is on complex and safety-critical components and their reliable and cost-efficient application. The goal is the optimal design and implementation of existing fastening solutions in accordance with customer-specific requirements.

Our qualified employees possess extensive expertise in fastening technology. Through cooperation with universities and participation in research projects, we ensure the continuous expansion of our technological capabilities.

The use of modern testing and measurement technology enables the evaluation of the performance and reliability of fastening elements under realistic operating conditions.

Application Engineering

1. Design and calculation of bolted joints in accordance with customer specifications and recognized standards (e.g. VDI 2230)
2. Application consulting for the optimal selection and use of fastening elements
3. Analysis of bolting cases and evaluation of mechanical and functional relationships
4. Execution of tests to determine relevant parameters (e.g. preload forces, friction coefficients, temperature behavior)
5. Support in implementing stable and robust assembly and application processes
6. Close coordination with customers to ensure application in line with requirements

Technial Support & Series Assistance

1. Comprehensive support by technical key account managers throughout all project phases
2. On-site support for application engineering issues
3. Support of ramp-up and series production processes to ensure consistent quality
4. Analysis and optimization of existing applications with regard to process reliability and cost-efficiency

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