Automatic Chain Tensioners

...compensate for chain elongation in machinery and conveyor systems, thereby supporting the service life of the chains in use. iwis chain tensioners are made from high-quality materials. Various types are available depending on the application. Correct tensioning and guiding of the chain reduces vibrations and extends service life.

Correctly tensioning the chain in practice means:

For sprockets with a small number of teeth, the chain should ideally be tensioned to increase the wrap angle around the sprocket, allowing as many teeth as possible to engage.
For sprockets with a larger number of teeth (z > 21), the chain can be tensioned downward on the slack strand, away from the sprocket. This reduces vibrations and requires less force, as the tension does not act against gravity.

If the chain slackening is too small, the chain is over-tensioned. The resulting increased surface pressure causes higher friction at the joints, accelerating wear elongation. In addition to the chain itself, other machine components are also subjected to greater stress, shortening their service life.

If the chain slackening is too large, the chain is under-tensioned. This can lead to increased noise and even chain jumping on the sprocket, potentially causing breakage. Especially with long, loose chain strands, significant vibrations can occur due to the superposition of the drive’s impulse and natural frequencies.

Tensioners Types in our Product Portfolio

TCR Type

with spocket and bearing

Features

Wider operating angle
Principle: Springs
Function: Rotary
Operating angle >45°
Head: Sprocket & Bearing

TCP Type

with low friction coefficent polythene head

Features

Wider operating angle
Principle: Springs
Function: Rotary
Operating angle >45°
Low friction coefficient polythene head

TO Type

Customized versions available on request

Features

Wider operating angle
Principle: Springs
Function: Linear
Low friction coefficient polythene head

ETR Type

with sprocket and bearing

Features

High Temperature Resistance
Principle: Springs
Function: Linear
Head: Sprocket & Bearing

AMS Type

Chain Tensioner ratchet function

Features

Ratchet Safety Mechanism
Principle: Springs
Function: Linear
Head: Sprocket & Bearing

Automatische Spanner - stabile Kettenspannung, weniger Wartungsaufwand

In vielen industriellen Anwendungen ist eine gleichmäßige Kettenspannung entscheidend für Laufruhe, Lebensdauer und Anlagenverfügbarkeit. Automatische Spanner von iwis unterstützen eine dauerhaft optimale Spannung, ohne dass manuell nachgestellt werden muss. Dadurch lassen sich Stillstände reduzieren und Wartungsintervalle planbarer gestalten.