SE Chain & Belt (Rosta Style) Tensioner Arm

Proven to be a highly effective solution for tensioning both chain and belt drives across a wide range of industrial applications, the TransDrive Rubber Block Series Tensioner is engineered for optimal performance, durability, and minimal maintenance. Its robust design ensures consistent tension, helping to prevent belt slippage, reduce wear, and enhance overall system efficiency.

Whether used in conveyor systems, manufacturing equipment, or automotive engines, the Rubber Block Series delivers reliable, uniform force that supports long-term operational stability and maximises equipment uptime.

Features

  • A one nut mounting system, which allows for 360º rotation.
  • Can be pre-tensioned by up to 30º, this means that as the chain or belt stretches, the tensioner automatically takes up the slack as the elastomeric elements automatically adjust the drives tension.
  • Chain and Belt life is increased by as much as 30%.
  • Elastomeric parts absorb vibrations and shock loading.
  • Maintenance Free – no metal on metal parts, lubrication free.
  • Impervious to dust and dirt, temperature -40ºC to +80ºC.
  • Two holes are provided on the arm, allowing two different levels of force to be generated: “normal” and “hard”. The “hard” setting deploys approximately 25% more force.

Materials

  • Stainless Steel
  • Galvanized
  • Nickel Plated
  • Plastic
SE - Tensioner Arm
SE Tensioner Range

Product Specifications

TypeODOALMTH1TH2HT1HT2HT3HT4W1W2W3HF in n/M 0 – 30ºWeight (kg)
SE11355065790806062072080 – 900.25
SE15506085811010080822830100 – 1400.45
SE18607510610115100801135940100 – 3200.75
SE27801101281515513510513451050120 – 820 1.8
SE3810514016101620018014015621365200 – 15003.7
SE4511520020121826022519020781770200 – 25006.5
All measurements in mm unless otherwise stated. M = Mounting Bolt
TypeAngle of PretensionMounting Bolt Torque
(Force required in psi)
10º20º30º
NormalHardNormalHardNormalHard
SE113.44.59.011.918.023.989
SE155.67.014.618.230.437.8221
SE1816.920.940.550.678.798.2434
SE2733.843.885.4111.1179.8233.8761
SE3865.381.4164.1205.0337.2421.51859
SE45112.5140.5292.5365.6584.5730.73629
The optimum angle of pretension is 20º, the maximum angle is 30º. At 20º the tensioner has maximum capability
to absorb vibrations and shock loads, and still have enough arc motion to automatically take up belt or chain
stretch.
Tensioner Selection
ChainBeltTensioner
25-1ASE11
35-1-2-3A, BSE15
35-1-2-3B,CSE18
40-1-2-3
40-3D, ESE27
50-1-2-3
60-1-2-3
80-1-2-3SE38
80-3SE45
100-1-2-3
120-1-2-3
140-1-2
160-1-2
180-1-2
200-1-2