*mydirectindustry

Catalogs
Power Ace India
BACKLASH FREE TORQUE LIMITERS

BACKLASH FREE TORQUE LIMITERS

Product catalog summary

General Information about R+W Safety Couplings:
R+W safety couplings are designed to be wear and maintenance-free within technical limits. They offer a fit clearance of 0.01 - 0.05 mm and can be customized with various materials and performance ratings. Optional ATEX certification allows for use in hazardous zones.

Backlash Free Torque Limiters:
These limiters range from 0.1 to 2,800 Nm and are available with different mounting options such as clamping hubs and keyway connections. They are designed for easy mounting, compensation for shaft misalignment, and adjustable torque settings.

Functionality and Features:
R+W safety couplings use a spring-loaded ball-detent system to protect drive components from overload. They offer single-position, multi-position, and full disengagement options, each with specific re-engagement and load handling characteristics.

Design and Specifications:
The couplings are available in various sizes and configurations, including miniature and standard designs with clamping collars or conical clamping bushings. They are made from materials like hardened steel and aluminum, with temperature ranges from -30 to +120°C.

Maintenance and Performance:
These couplings are maintenance-free and lubricated for life. They are designed to handle many disengagements without performance degradation, especially at lower speeds. Optional sealing provides protection from contaminants and is recommended for harsh environments.

Technical Specifications:
The document provides detailed specifications for different models, including torque adjustment ranges, dimensions, and material properties. It also includes information on radial loads and the use of integral bearings to support drive attachments.

Specifications:

Materials: High-grade stainless steel for bellows, hardened steel for clutch systems, and steel or aluminum for clamping hubs depending on size.
Design: Features include conical clamping assemblies, spring-loaded ball-detent clutch systems, and operable temperature ranges from -30 to +120°C.
Function Systems: Options include single position automatic re-engagement (W), multi-position automatic re-engagement (D), load holding/blocking (G), and full disengagement/manual re-engagement (F).

Models and Properties:

SK3/SK5: Torque adjustment range from 0.1 to 850 Nm, with various sizes and bore diameters available.
ES2: Elastomer insert models with rated torque ranging from 9 to 2450 Nm, featuring vibration damping and electrical isolation.
SLN/SLP: Lightweight designs with adjustment ranges from 10 to 700 Nm, suitable for hazardous zones with ATEX certification.

Ordering Examples: The document provides examples for ordering specific models, including special designations for custom features such as bore/keyway dimensions.

Tables and Data: The document includes extensive tables detailing dimensions, torque ranges, and other critical parameters for each model, aiding in the selection of appropriate components for specific applications.

Specifications:
The document outlines the specifications for clamping hubs and safety couplings, focusing on the maximum transmittable torque, which depends on the bore diameter. The ordering example provided is SL2 | SK2 60 W 30 20 80 40-100 XX, where XX denotes custom features.

Design:
The clamping hub features a clamping collar with a clamping screw and a spring-loaded ball-detent clutch system. It is designed for high stiffness and operates within a temperature range of -30 to +100°C. The design includes a backlash-free, vibration-damping elastomer insert.

Available Function Systems:
Two function systems are available: W (single position/automatic re-engagement) and D (multi-position/automatic re-engagement).

Properties:
The document provides detailed properties for different models, including rated torque, maximum torque, adjustment range, overall length, and actuation ring diameter. It also specifies the bore diameter range, inner diameter, and tightening torque for various sizes.

Materials:
The clutch system is made from high-strength steel with hardened steel drive balls, while the hubs are made from high-strength aluminum. The elastomer insert is wear-resistant and thermally stable TPU.

Ordering Information:
For custom features, an XX is added to the part number, and special requirements are described. The ESL model has a fixed disengagement torque that is tamper-proof.

Model ESL:
The ESL model includes specifications for size, elastomer insert type, rated torque, torque setting range, overall length, hub diameter, clamping fit length, and inside diameter. The disengagement torque is permanently set at the factory.

Catalog excerpts

BACKLASH FREE TORQUE LIMITERS 0.1 - 2,800 Nm GENERAL INFORMATION ABOUT R+W SAFETY COUPLINGS: SERVICE LIFE SPECIAL SOLUTIONS As long as the technical limits are not exceeded these couplings are wear and maintenance free. Various materials, tolerances, dimensions and performance ratings available for custom applications on request. Overall shaft / hub clearance of 0.01 - 0.05 mm ATEX (Optional) For use in hazardous zones 1/21 and 2/22, these safety couplings have been authorized under directive 94/9/EG and are available with certification. ATEX CERTIFIED COUPLINGS SERVO DISC PACK COUPLINGS SCL

Open the catalog to page 1

ES BACKLASH FREE TORQUE LIMITERS 0.1 - 2,800 Nm MODEL FEATURES SK1 with conical clamping bushing (or clamping hub in smaller sizes) for indirect drives from 0.1 - 2,800 Nm ► integral bearing to support sprockets, gears, and other drive elements ► compact simple design ► adjustable torque settings SKP with keyway connection for indirect drives from 0.1 - 2,800 Nm ► integral bearing to support sprockets, gears, and other drive elements ► compact simple design ► adjustable torque settings SKN with clamping hub for indirect drives from 5 - 1,800 Nm ► integral bearing to support sprockets, gears,...

Open the catalog to page 2

SK3 with conical clamping bushings and bellows coupling for direct drives from 5 - 2,800 Nm ► high clamping pressure ► compensation for shaft misalignment ► adjustable torque settings SK5 with clamping hubs, bellows coupling, and blind mate system for direct drives from 0.1 - 850 Nm ► very easy to mount and dismount ► electrically and thermally isolating ► adjustable torque settings ES2 with clamping hubs and elastomer coupling for direct drives from 1 - 1,800 Nm ► compensation for shaft misalignment ► adjustable torque settings

Open the catalog to page 3

ESL BACKLASH FREE TORQUE LIMITERS TOROLIGHT® 1 - 700 Nm MODEL FEATURES SLN with clamping hub for indirect drives from 10 - 700 Nm ► integral bearing to support sprockets, gears, and other drive elements ► adjustable torque settings ► ultra compact, low inertia version SLP with keyway connection for indirect drives from 10 - 700 Nm ► integral bearing to support sprockets, gears, and other drive elements ► adjustable torque settings ► ultra compact, low inertia version SL2 with clamping hubs and bellows coupling for direct drives from 10 - 400 Nm ► compensation for shaft misalignment ► adjustable...

Open the catalog to page 4

GENERAL INFORMATION TORQUE LIMITERS SINGLE POSITION Standard Version ► after the overload condition has been removed the clutch will automatically re-engage precisely at its original orientation ► maintains synchronous shaft positioning ► switch plate moves at disengagement to signal overload ► patented preload for zero backlash; suitable for high precision drives ► after the overload condition has been removed the clutch will automatically re-engage at one of multiple angular intervals ► immediate availability of the machine after overload disengagement ► switch plate moves at disengagement...

Open the catalog to page 5

GENERAL INFORMATION TORQUE LIMITERS SINGLE POSITION MULTI-POSITION LOAD HOLDING GENERAL INFORMATION R+W safety couplings operate as spring loaded ball-detent clutches. They protect drive components (e.g. motors, transmissions, and spindles) from damage caused by machine crashes and other forms of overload. The torque is transmitted by hardened balls (4) loaded into conical detents (5). The balls are loaded into the detents by the spring disc system (2) across the switch plate (3). Note: Automatic re-engagement only occurs at low speed. The disengagement torque is continuously adjustable via the...

Open the catalog to page 6

FULL DISENGAGEMENT FULL DISENGAGEMENT In the full disengagement version the spring system (7) snaps over center, eliminating residual force on the balldetent system. This causes a complete separation at overload, allowing shafts to spin freely until they are stopped. engaged e-engagement must be performed manually R (see figure at right). BALL-DETENT CLUTCHES ARE THE SAME DESIGN IN THE SK AND ES2 SIZES From size 60 and up a recess is included in the torque adjustment nut, allowing for 2 levers to be used in a self contained fashion, as shown in the figure on the right. ATEX CERTIFIED COUPLINGS...

Open the catalog to page 7

GENERAL INFORMATION TORQUE LIMITERS BEHAVIOR AND CHARACTERISTICS R+W safety couplings work exclusively with a disc spring system with a special characteristic. Prior to the the torque adjustment nut coming into contact with the disc springs and applying pressure (1) no torque transmission is possible. Once the spring is loaded, the active range of the spring system had been reached, with the spring rate declining as further compression takes place, both prior to, and during disengagement (2). Once completely depressed, the spring system is rigid (3). SPRING CHARACTERISTIC special design TKN max...

Open the catalog to page 8

GENERAL INFORMATION TORQUE LIMITERS SIZE SLN/SLP

Open the catalog to page 9

WITH CONICAL CLAMP 0.1 - 2,800 Nm PROPERTIES Clutch system: spring loaded ball-detent principle. Operable temperature range from -30 to +120˚ C. MATERIAL C lutch system: hardened steel C lamping ring size 1.5 - 10: aluminum C onical clamping bushing size 15 - 2500: steel AVAILABLE FUNCTION SYSTEMS W = Single postion / automatic re-engagement (standard) D = Multi-position / automatic re-engagement G = Load holding / load blocking F = Full disengagement / manual re-engagement DESIGN Size 1.5 - 10 with clamping ring and a single clamping screw. Size 15 - 2500 with conical clamping bushing and six...

Open the catalog to page 10

WITH KEYWAY CONNECTION 0.1 - 2,800 Nm PROPERTIES MATERIAL C lutch system: hardened steel DESIGN With DIN 6885 or ANSI B17.1 keyway. Clutch system: spring loaded ball-detent principle. Operable temperature range from -30 to +120˚ C. AVAILABLE FUNCTION SYSTEMS W = Single postion / automatic re-engagement (standard) D = Multi-position / automatic re-engagement G = Load holding / load blocking F = Full disengagement / manual re-engagement MINIATURE DESIGN | SIZE 1.5 - 10 Standard with keyway mounting K pin hole for torque adjustment wrench actuation distance see table STANDARD DESIGN | SIZE 15 -...

Open the catalog to page 12

BACKLASH FREE TORQUE LIMITERS

BACKLASH FREE TORQUE LIMITERS

Catalog excerpts

All Power Ace India catalogs and technical brochures