Interaction of core,
process, and winding
conditions
What Is Radial Crush? | Radial Core Strength Testing
Radial Crush refers to the resistance of a winding core against radial loads that occur during the winding of elastic materials. The value indicates how stable a core remains under real operating conditions and how reliably it supports the wound material.
In contrast to conventional parameters such as edgewise crush resistance, radial crush provides a practical assessment of actual load-bearing capacity. Factors such as material structure, moisture, winding parameters, and machine conditions play a decisive role.
Radial crush is particularly relevant for applications involving flexible wound materials with a post-tensioning effect, where precise winding results, high process reliability, and optimal material utilization are important. Targeted assessment of this property allows for improvements in product quality and cost-efficiency.
The radial crush resistance of a core is influenced by several parameters
The successful production of rolls depends, among other things, on:
- Structure and moisture content of the sleeve/winding core (including storage conditions)
- Process and winding parameters such as web tension
- Material, surface, thickness, and residual tension effect of the wound material
- Machine condition
A particularly important factor is the moisture content of the core. This usually alters the radial crush resistance to a greater extent.
For practical applications, this means:
To achieve optimization, it is important to consider not just the core itself, but the entire process—including machine settings and storage conditions. We utilize specialized measurement and simulation equipment to generate practical, reliable results. Selecting the right core quality can lead to significant savings, whereas relying on historical data alone may result in excessive core costs or expensive claims.
