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Torque limiters SL

Product catalog summary

Overview
The document details the technical specifications and features of the R+W Series SL safety couplings, designed for torque ranges from 10 to 700 Nm. These couplings are lightweight, compact, and offer various engagement options including single-position, multi-position, and full disengagement.

Design and Features
The Series SL couplings are extremely lightweight, achieving up to a 60% weight reduction compared to standard series. They offer a 50% increase in torque rating, good dynamic characteristics, and are corrosion-resistant. The couplings use a spring-tensioned ball-detent principle ensuring zero backlash and feature a simple torque setting mechanism.

Torque Setting
The torque setting is adjustable via an adjustment nut with a clamp screw. The desired torque value is set by aligning the reference mark with the torque scale.

Models and Applications
Several models are available, including SLP, SLE, and SL2, each designed for specific applications such as direct or indirect drives. The models feature clamping hubs, keyway connections, and options for misalignment compensation and vibration damping.

Technical Specifications
Detailed tables provide specifications for each model, covering aspects such as adjustment range, overall length, bore diameter, and weight. The couplings operate within a temperature range of -30 to +120°C and are maintenance-free.

Functionality
The couplings transmit torque through hardened ball bearings loaded into conical detents. In the event of overload, the actuation ring moves, disconnecting the driving and driven sides. Re-engagement occurs at slow rotational speeds.

Accessories
Accessories include mechanical limit switches and proximity sensors for emergency OFF functions, with specific order numbers provided.

General Function
The document explains the safety element functionality, emphasizing the importance of staying within the specified torque adjustment range to ensure proper operation.

Specifications
The document outlines the specifications for R+W safety couplings, focusing on their rotational speed, wear characteristics, and maintenance requirements. The service life of the coupling is influenced by rotational speed and disengagement events. No wear occurs while engaged, and immediate shutdown is necessary upon disengagement using a mechanical limit switch or proximity sensor. Maintenance is minimal due to lifetime lubrication and backlash-free connections.

Selection Criteria
Safety couplings are selected based on the desired disengagement torque, which should exceed the torque needed for normal equipment operation. This torque is determined by data from the drive, motor, or gearbox.

Mounting Instructions
Proper installation requires clean, burr-free shafts and hub bores, with specific clearance and oiling to avoid fretting corrosion. The document provides detailed mounting and dismounting instructions for various models, emphasizing the importance of correct axial positioning and torque specifications.

Misalignment Compensation
Exact alignment of couplings increases service life and reduces stress on bearings. Maximum misalignment values are provided, and alignment with a dial indicator is recommended for high-speed systems.

Elastomer Insert
The SLE coupling features an elastomer insert that transmits torque without backlash and dampens shock and vibration. Two designs are available, each with specific material, temperature range, and characteristics.

Product Range
The document lists various R+W product series, including torque limiters, bellows couplings, line shafts, miniature bellows couplings, elastomer couplings, linear couplings, and polyamide couplings, with specifications on torque and bore diameters.

Additional Information
The document concludes with contact information for R+W Antriebselemente GmbH and a disclaimer regarding the information provided.

Catalog excerpts

LIGHTWEIGHT AND COMPACT single-position multi-position full disengagement S TORQLIGHT ® SAFETY COUPLINGS SERIES SL | 10 – 700 Nm THE ULTIMATE COUPLING FROM 10 – 700 Nm www.rwcouplings.com SL_E.indd 1 22.05.12 10:48

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single-position multi-position full disengagement SERIES SL DESIGN / FEATURES Extremely lightweight construction ■ Up to 60 % weight reduction in comparison to the standard series ■ Torque rating increased by 50 % ■ Good dynamic characteristics ■ Spring tensioned ball-detent principle with absolutely zero backlash ■ Corrosion resistant ■ Very simple torque setting TORQUE SETTING Torque scale These safety couplings are preset by R+W to the customer‘s specified values. Reference mark Changes to the preset value are very simple to make: ■ Loosen the adjustment nut‘s clamp screw. ■ Turn the adjustment...

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single-position multi-position full disengagement MODELS SLN FEATURES POSSIBLE APPLICATIONS Spindle With clamping hub for indirect drives ■ ■ ■ ■ ■ Integral bearing for timing belt pulley or sprocket Compact, simple construction Torque setting is continuously variable Frictional clamp connection Simple to install Clamping hub Table Toothed belt Motor see page 4 SLP With keyway connection for indirect drives ■ ■ ■ ■ Integral bearing for timing belt pulley or sprocket Compact, simple construction Torque setting is continuously variable Simple keyed connection With keyway Spindle Table Toothed belt...

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single-position multi-position full disengagement Production monitored Type tested MODEL SLN with clamping hub BACKLASH FREE TORQUE LIMITER A Actuation path N Ø DH7 Ø O1 Ø Eh7 ØO Ø O2 ØF Thread depth G I ISO 4762 J M L C Temperature range: -30 to +120°C Service life: These couplings are maintenance free and stable over their entire service life if technical limits are not exceeded Ø O3 K P Design: With clamp collar and screw per ISO 4762 Components of compact and rigid design with backlash free interface ØB R ISO 4762 H Fit tolerance: Overall clearance between shaft and hub 0.01-0.05 mm Keyway...

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single-position multi-position full disengagement Production monitored Type tested MODEL SLP with pure keyway connection BACKLASH FREE TORQUE LIMITER A ØF Thread depth G Temperature range: -30 to +120°C Service life: These couplings are maintenance free and stable over their entire service life if technical limits are not exceeded Ø O1 Ø DH7 Actuation path N ØO Ø Eh7 Ø O2 K Fit tolerance: Overall clearance between shaft and hub 0.01-0.05 mm J R ISO 4762 Design: Keyway per DIN 6885 or ANSI standard dimensions Components of compact and rigid design with backlash free interface ØB DIN 6885 keyway...

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single-position multi-position full disengagement Production monitored Type tested MODEL SL2 with clamping hubs and metal bellows BACKLASH FREE TORQUE LIMITER Design: Clamping hub with one ISO 4762 screw per hub. Components of compact and rigid design with backlash free interface. Misalignment compensation via torsionally rigid bellows A ØB P1 / P2 M1 I1 ISO 4762 Actuation path N Service life: These couplings are maintenance free and stable over their entire service life if technical limits are not exceeded Ø O2 Ø O1 Ø D2H7 C2 Ø D1H7 ØO Temperature range: -30 to +100°C Fit tolerance: Overall...

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single-position multi-position full disengagement Production monitored Type tested MODEL SLE with clamping hubs and elastomer insert BACKLASH FREE TORQUE LIMITER A ØB P1 / P2 M1 I1 ISO 4762 Keyway on request Actuation path N DE Design: Clamping hub with one ISO 4762 screw per hub. Components of compact and rigid design with backlash free interface. Misalignment compensation via elastomer insert Service life: These couplings are maintenance free and stable over their entire service life if technical limits are not exceeded Ø O1 Ø O2 Ø D2H7 C2 Ø D1H7 O Temperature range: -30 to +100°C Fit tolerance:...

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single-position multi-position ACCESSORIES BACKLASH FREE TORQUE LIMITER Spanner wrench for torque adjustment Order no.: see table Series 60 150 300 Order no.: min. 30 55/4 66/5 82/5 100/6 max. Mechanical limit switch (emergency OFF function) Order no.: 618.6740.644 Technical data Max. voltage: Max. constant current: Protective system: 500 V AC 10 A IP 65 Contact system: Opener (forced seperating) Temperature range: Actuation: PG 11 - 30 - +80 ˚C Plunger (metal) 10 20 62 16 22 8 Ø 4,2 4 30.6 Swith diagram: 31 Appox. distance 0,1-0,2 Ø 7,5 Attention: A 100 % test of the switch‘s functionality after...

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single-position multi-position GENERAL FUNCTION BACKLASH FREE TORQUE LIMITER Safety element functionality Single-position / multi-position Torque is transmitted through hardened ball bearings (4) arranged around the coupling’s circumference and loaded into conical detents (5) ■ The ball bearings are loaded into the detents by an actuation ring (3) which, in turn, is held in place by disc springs (2) ■ Disengagement torque is continuously adjustable through rotation of the adjustment nut (1) ■ In the event of overload the actuation ring (3) moves toward the disc springs (2) which are pushed over...

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single-position multi-position MOUNTING INSTRUCTIONS MOUNTING AND DISMOUNTING OF TORQUE LIMITERS Installation preparation The shafts and hub bores to be connected must be free of contaminants and burrs. Check shaft dimensions and tolerances (including key width and height dimensions). The bores of the R+W safety couplings are machined to an ISO H7 fit. For a clamp connection the overall clearance between shaft and hub must be between 0.01-0.05 mm. This fit clearance, along with oiling of shaft journals assists in installation and removal without reducing clamping force. Fretting corrosion is...

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single-position multi-position MOUNTING AND DISMOUNTING OF TORQUE LIMITERS SLE elastomer insert The elastomer insert is the compensating element in an SLE coupling. It transmits torque without backlash and damps shock and vibration. The SLE couplings elastomer insert determines the hysteresis characteristics of the entire rotational axis, and is available in two different designs. Distance dimension Elastomer insert Hub A When the coupling hubs are pushed together during installation, axial force is needed to overcome the elastomer insert‘s preload tension. The amount of force required can be...

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Torque limiters SL

Torque limiters SL

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