Product Group Tensioner Devices
16Pages

ROSTA Tensioner Devices Maintenance-free tensioner systems for belt and chain drives Easy to install – available in 7 standard sizes – wide range of accessories available

Customer Benefits from using ROSTA • Guarantees the lowest possible maintenance outlay • Is tensioned “for life” (belts) • Transmits a constant torque • Gentle belt handling – longer service life • Prevents the polygon effect in the slack side • Increases the chain contact arc • Excludes any jumping of the chain links • Causes the slack side to run tautly and almost silently • Offers continuous contact pressure • Compensates for wear on the scrapers • Effectively dampens vibrations in the belt band • Guarantee for clean conveyor belts

Tensioner Devices in Belt and Chain Drives • Offers an extremely quiet chain run • Reduces wear on rollers and bearings • Effectively dissipates vibrations • 3-fold slack compensation with “Boomerang® ” • Compensates for belt lengthening • Prevents excessive slippage and over-heating • Offers constant torque transfer • Guarantees longer belt lifetimes • Offers an exactly defined contact pressure • Accurately transports workpieces • Maintenance-free and long lasting • Is a cost-effective alternative to pressure cylinders

Selection table Steel parts ROSTA blue painted. Rubber quality Rubmix 10. Steel parts galvanized. Rubber quality Rubmix 20. Marked with yellow dot. Heat resistant Steel parts ROSTA blue painted. Rubber quality Rubmix 40. Marked with red dot. Tension force 40% less than SE. Additional tensioner devices Standard component Standard tensioner devices Arm and inner core especially welded for use on combustion engines and compressors. Steel parts ROSTA blue painted. Marked with white ring. Stainless steel For the use in food- and pharmaceutic industries. Material: GX5CrNi19-10. Exception: SE-I 40...

General technology F pretension infinitely variable in the positions “normal” or “hard” The ROSTA tensioners should be installed on a stiff, even F and clean machine part by means of the central bolt. The frictional connection on flange is usually fully suffi­ ient for c final positioning. The positioning notch on flange can be used to assure the tensioner additionally on uneven and dirty surfaces by setting a roller-pin. adjustable chain track shock absorption torsion angle scale Tensioning force F The tensioning force can be continuously adjusted. The max. pre-tensioning angle is + 30°...

Tensioner Devices s normal T normal Type SE/SE-G/SE-W Type SE-R Type SE-I Tensioning element with strengthened tensioning arm Tensioner Devices Standard Tensioner Devices Types SE / SE-G / SE-W Art. No. Tensioning element made out of stainless steel, INOX G Further product and performance datas on pages 4.4–4.5.

Tensioner Devices s normal Tensioning element with front mounting J 2 Further product and performance datas on pages 4.4–4.5. Tensioner Devices

Sprocket wheel set type N Sprocket wheel type N Duplex “D” Sprocket wheel set type N Rollerchain ANSI DIN 8187 Adjusting range track R Sprocket wheel type N 35 Roller chain ANSI DIN 8187 Tensioner Devices

For an ideal positioning of the chain rider/s on the threaded rod we do recommend to position them on each side by means of two nuts, secured against each other, with some play for swivelling into working position. Chain rider set type P Chain rider type P Glide angle Chain Drives Chain rider set type P Roller chain ANSI DIN 8187 Adjusting range track R Chain rider type P ISO 06 B ISO 08 B Roller chain ANSI DIN 8187 Mounting instructions for Chain Drives See also complementary mounting instructions on page 4.5. Sprocket teeth in mesh The ROSTA tensioning device should be placed on the...

Accessories belt drives B Tensioning roller Type R belt width Instructions for belt drives a) Selection of the adequate ROSTA Tensioner size Selection table mentioning the most conventional V-belt types. Size SE* (without SE-W and SE-B) Diam. of smaller pulley [mm] Initial operation test-force FI** [N] Tensioner Devices V-belt type * General basic selection criteria: F resulting tensioning force by a pre-tension angle of 20° (see table page 4.5) FI initial operation test-force according guidelines of the belt manufacturer z quantity of belts in drive 2 multiplier for the compensation of...

b) Modalities of tensioning See also complementary mounting instructions on page 4.5. Tensioning from “inside” of the belt drive with grooved pulley – Installation in slack span of the belt drive, make sure that the belts are maintaining sufficient contact-arc on the driver- and driven-pulley. – By extremely long centre distances between driver and driven pulley it is recommendable to use on the tensioner a deep-grooved pulley to avoid excessive slack beating. Tensioning with flat roller on belt back – The diameter of the flat tensioning roller should at least measure 2 ⁄3 of the diameter...

ROSTA Tensioner Devices and Accessories to meet individual customer requirements J Support bracket type WS For the easy mounting of all standardized ROSTA Tensioners (except SE 50). Tensioner Devices By uneven surfaces and/or by paint coatings, which are giving insuffi­ cient friction locking, the positioning and further re-tensioning can be made with these standardized Safety Sockets. ROSTA www.rosta.com

Guide roller suspensions with tensioners SE and pre-tensioning devices VS For the accurate definition of the required pre-tension and limitation of the roller travel we do recommend the use of our pre-tensioning clamp VS allowing angle adjustments from 0 – 15° (for all SE-sizes available). Tensioner Devices For the transfer of very high tension-forces we do recommend to use this double arm tensioner, avoiding any misalignment or fault of parallelism between tensioner housing and inner square-core-generating belt eating angular off-set of the tensioning pulley.