Durable outer housing.
Precision crafted inner section
featuring multiple connection options.
Specialized, high-performance elastomer compound cords.
Tensioning
Belt Drive
Tensioning
Belt drives rely on adequate tension to efficiently and reliably transmit power. Correct tension needs to be initially applied and maintained to compensate for wear and elongation. Incorrect belt drive tension is a major driver of reliability issues, maintenance downtime and reduced efficiency.
Spannung des Spannriemenantriebs
Automatic belt drive tensioning with ROSTA MB Motorbases or ROSTA SE tensioners provides maintenance-free and simple to install solutions for high-efficiency and reliable drives.
Product information
Download our product catalogue for technical product information, an in-depth technology overview and more, or get in touch with our sales department to have a consultation on how ROSTA can help you.
product selection tool
ROSTA STANDARD MOTORBASE SELECTOR
Motor Type
Motor Frame Size
Selection tool recommendations are general in nature and may not be suitable for specific applications and installations. Consider the comprehensive product data and guidelines provided in the ROSTA catalogue and other resources. For further assistance, contact your local ROSTA representative
| Max. Motor RPM | Max. Motor Power | ROSTA Motorbase |
|---|---|---|
| 1000 RPM | 0.75 kW | ROSTA MB 27 x 120 |
Type MB 27
Comments:
Larger Motorbases available, please contact ROSTA for details.
product selection tool
Tensioner Selector for V-belt Drives
Unit selector
Belt Type
Diameter of Smaller Pulley
Number of Belts
For full product specification or for tensioner types not listed above, please download ROSTA's "Tensioning Devices" catalogue or get in touch with a ROSTA representative.
Selection tool recommendations are general in nature and may not be suitable for specific applications and installations. Consider the comprehensive product data and guidelines provided in the ROSTA catalogue and other resources. For further assistance, contact your local ROSTA representative
| Initial Static Belt Deflection Force | Minimum Tensioner Force | ROSTA Recommended Tensioner Force |
|---|---|---|
| 22 N/belt | 22 N | 44 N |
Standard Tensioner Selection
SE 11
| Torsion Angle | Force J1 | Deflection J1 | FoS | Force J2 | Deflection J2 |
|---|---|---|---|---|---|
| 5˚ | 7 N | 7 mm | 0.2 | 9 N | 5 mm |
| 10˚ | 19 N | 14 mm | 0.4 | 25 N | 10 mm |
| 15˚ | 32 N | 21 mm | 0.7 | 43 N | 16 mm |
| 20˚ | 49 N | 27 mm | 1.1 | 66 N | 21 mm |
| 25˚ | 69 N | 34 mm | 1.6 | 92 N | 25 mm |
| 30˚ | 96 N | 40 mm | 2.2 | 128 N | 30 mm |
Tensioner Type: STANDARD
Material: Steel, Painted
Working Temperature: – 40 ° to + 80 °C.
Rubber Specification: Rubmix 10
Marking: n/a
Oil Resistant Tensioner Selection
SE 11 - G
| Torsion Angle | Force J1 | Deflection J1 | FoS | Force J2 | Deflection J2 |
|---|---|---|---|---|---|
| 5˚ | 7 N | 7 mm | 0.2 | 9 N | 5 mm |
| 10˚ | 19 N | 14 mm | 0.4 | 25 N | 10 mm |
| 15˚ | 32 N | 21 mm | 0.7 | 43 N | 16 mm |
| 20˚ | 49 N | 27 mm | 1.1 | 66 N | 21 mm |
| 25˚ | 69 N | 34 mm | 1.6 | 92 N | 25 mm |
| 30˚ | 96 N | 40 mm | 2.2 | 128 N | 30 mm |
Tensioner Type: OIL RESISTANT
Material: Steel, Galvanised
Working Temperature: – 30 ° to + 90 °C.
Rubber Specification: Rubmix 20
Marking: Yellow Dot
Front Mounted Tensioner Selection
SE-F 15
| Torsion Angle | Force J1 | Deflection J1 | FoS | Force J2 | Deflection J2 |
|---|---|---|---|---|---|
| 5˚ | 11 N | 9 mm | 0.3 | 14 N | 7 mm |
| 10˚ | 26 N | 17 mm | 0.6 | 32 N | 14 mm |
| 15˚ | 43 N | 26 mm | 1.0 | 54 N | 21 mm |
| 20˚ | 66 N | 34 mm | 1.5 | 82 N | 27 mm |
| 25˚ | 94 N | 42 mm | 2.1 | 118 N | 23 mm |
| 30˚ | 135 N | 50 mm | 3.1 | 169 N | 40 mm |
Tensioner Type: STANDARD
Material: Steel, Painted
Working Temperature: – 40 ° to + 80 °C.
Rubber Specification: Rubmix 10
Marking: n/a
Stainless Steel Tensioner Selection
SE-I 15
| Torsion Angle | Force J1 | Deflection J1 | FoS | Force J2 | Deflection J2 |
|---|---|---|---|---|---|
| 5˚ | 11 N | 9 mm | 0.3 | 14 N | 7 mm |
| 10˚ | 26 N | 17 mm | 0.6 | 32 N | 14 mm |
| 15˚ | 43 N | 26 mm | 1.0 | 54 N | 21 mm |
| 20˚ | 66 N | 34 mm | 1.5 | 82 N | 27 mm |
| 25˚ | 94 N | 42 mm | 2.1 | 118 N | 34 mm |
| 30˚ | 135 N | 50 mm | 3.1 | 169 N | 40 mm |
Tensioner Type: STAINLESS STEEL
Material: GX5CrNi19-10
Working Temperature: – 40 ° to + 80 °C.
Rubber Specification: Rubmix 10
Marking: n/a
Heat Resistant Tensioner Selection
SE 18 - W
| Torsion Angle | Force J1 | Deflection J1 | FoS | Force J2 | Deflection J2 |
|---|---|---|---|---|---|
| 5˚ | 20 N | 9 mm | 0.5 | 24 N | 7 mm |
| 10˚ | 46 N | 17 mm | 1.0 | 57 N | 14 mm |
| 15˚ | 77 N | 26 mm | 1.8 | 96 N | 21 mm |
| 20˚ | 112 N | 34 mm | 2.5 | 140 N | 27 mm |
| 25˚ | 153 N | 42 mm | 3.5 | 191 N | 34 mm |
| 30˚ | 211 N | 50 mm | 4.8 | 263 N | 40 mm |
Tensioner Type: HEAT RESISTANT
Material: Steel, Painted
Working Temperature: – 35 ° to + 120 °C.
Rubber Specification: Rubmix 40
Marking: Red Dot
Types
Type MB 100
The self-adjusting universal Motorbase (MB 100) for friction belt drives with drive power in the 90 kW to 250 kW range (motor frame sizes 315 M to 355 L or NEMA frame sizes 449T and 586/7 = 200-350 HP).
Type MB 27
The ideal standardized motor base for smaller belt drives with electric motors from 0.75 to 4.0 kW (frame size dimensions 90 S/L to 112 M).
Type MB 38
The new ROSTA motor base type MB 38 for motor frame sizes from 132 S to 160 L (3 to 15 kW) is now available on the drive component market - compact, operator friendly, ready for immediate installation and cost-effective.
Type MB 50
The type MB 50 is the most universal self-tensioning base for all friction belt drives with 7.5 to 45 kW electric motors (frame size dimensions 160 M S to 225 M).
Type MB 55
The new ROSTA MB 55 Motorbase, for electric motors, includes a central pre-tensioning device, supports motor footprints on both plates, has an interchangeable motor plate for center or offset positions and comes in three sizes.
Type MB 70
The ideal standardized motor base for heavy duty belt drives with electric motors from 37 to 200 kW (frame 250 M to 315 S).
Type MB 75
The MB 75 features a single, centered pre-tensioning device for easy handling (like the MB100).
Type SE
The tensioning element with the specification SE (SE 11 to SE 50) is the most commonly used unit for tensioning all types chain and belt drives.
Type SE-B
The ROSTA tensioning element type SE-B (Boomerang) compensates the slack in extremely long chain drives.
Type SE-F
The ROSTA tensioning elements type SE-F is designed for front mounting applications on "blind" frame structures.
Type SE-FE
The ROSTA tensioning element type SE-FE is designed for front mounting applications on engines such as cooling compressors and fan drives.
Type SE-G
The tensioning element type SE-G (marked with yellow dot) has zinc-plated steel parts and therefore is specially designed for "outdoor" applications; e.g. for building machines.
Type SE-I
The ROSTA tensioning elements type SEI are all made out of stainless steel.
Type SE-R
Tensioning element with strengthened tensioning arm.
Type SE-W
The tensioning element type SE-W (marked with red dot) is equipped with heat resistant elastomeric inserts.
Explore ROSTA
Many companies worldwide value our products and recommend them to others. But read for yourself what our customers have to say about their experiences with us.
core technology
The ROSTA Element, an elastomer powered torsional spring, is central to our range of specialized machine components designed to provide a combination of useful functions. ROSTA components offer dependable performance across a broad spectrum of industrial applications
refurbish
Select ROSTA elements are capable of being refurbished by replacing either the rubber cords, the inner mounting or the outer housing. Not only is this efficient, but its great for the environment as well.
Contact Sales to learn more about our refurbishment options.
ACCESSORIES
Type BK
ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets.
Type BR
ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets.
Type Chain Rider P
This high-quality rider is made of friction resistant industrial plastic and allows the use on both rider sides.
Type Chain Rider Type Set-P
The high-quality rider is made of friction resistant industrial plastic and allows the use on both rider sides.
Type Roller R
The roller is made of high-quality industrial plastic material with two self-lubricating ball bearings 2Z.C3.
Type Roller RL
The tensioning roller is made of industrial plastic material with two self-lubricating ball bearings 2Z.C3 and is designed for light-duty drives.
Type Wheel N
The sprocket wheel runs on a self-lubricating ball bearing 2Z.C3.
Type Wheel set - type N
The ROSTA sprocket wheel set completes the tensioning element for applications in chain drives.
Type WS
ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets.
other products
Elastic suspension for all types of screening machines and shaking conveyors. ROSTA offers the widest range of oscillating mounts. From standard mounts to heavy duty. Also available in stainless steel.
contact us
Get in touch with us. Find your ROSTA company or the ROSTA distribution partner in your country nearest to you and let us know how we can support you to make you successful in your market.