klemmung

Klemmung is a term used in engineering to describe a binding or jamming of moving parts, where clearance is reduced to the point that components can no longer move freely. It can occur in mechanical assemblies, engines, transmissions, and hydraulic or pneumatic systems. The concept covers both temporary binding during operation and permanent seizure after overload or damage.

Causes of klemmung include improper tolerances or misalignment that create interference, thermal expansion differences that cause parts to bind as temperatures change, excessive preload or over-tightening, and material deformation under load. Contamination, corrosion, or debris in gaps can also promote binding, as can lubrication failure leading to dry friction. In hydraulic or pneumatic actuators, high pressure or seal damage can induce sticking of pistons or rods.

Manifestations of klemmung vary by system but commonly include increased effort required to move parts, unusual noises or heat generation, partial or complete loss of movement, and accelerated wear or scoring on contacting surfaces. If not addressed, klemmung can lead to component damage, leakage, misalignment, or safety risks.

Prevention focuses on proper design and manufacturing controls, including appropriate clearances, allowances for thermal expansion, robust lubrication, and contamination control. Correct assembly procedures and periodic maintenance help detect early signs of binding. When klemmung occurs, remediation typically involves disassembly, cleaning, re-lubrication, realignment or replacement of worn parts, and adjustment of clearances to restore free movement.