Related Manuals for RATHI Gear-Flex RGD
Summary of Contents for RATHI Gear-Flex RGD
- Page 1 INSTALLATION & OPERATION MANUAL TYPE - RGD / RGS RATHI TRANSPOWER PVT. LTD., Gaia Apex, S.No.33/2D, Viman Nagar, PUNE – 411 014 (INDIA)
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Page 2: Table Of Contents
GEAR-FLEX COUPLING TABLE OF CONTENTS SR. No. Topics Page No Product details Notes Technical Data Marking Details Installation Start-Up and Operations Failures - Causes and Remedies Maintenance and Repair Storage Coupling Spare Components Declaration : ATEX RE-OM-G-04/00-05/15 Page 2... -
Page 3: Notes
GEAR-FLEX COUPLING 1. NOTES 1.1 GENERAL INSTRUCTIONS Please read the assembly instructions carefully before starting to operate the coupling. Pay particular attention to the safety instructions. The GEAR-FLEX coupling is approved for use in hazardous areas, if marked with CE mark. - Page 4 MANUFACTURER’S DECLARATION IN CONFORMANCE TO EC MACHINE DIRECTIVE 2006/42/EC Rathi Gear-Flex Couplings must be treated as components in the sense of the EC machine directive 2006/42/EC. Therefore M/s Rathi need not issue a separate declaration of conformity. Information for safe use, installation, start up and operation can be found in this manual.
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Page 5: Technical Data
2. The outer dimensions of flanges are rounded up to nearest figure in above table. 3. For special versions contact M/s RATHI. 4. Couplings generally used up to 120° C. Can be used for higher temperatures by using proper grade of grease. - Page 6 2. The outer dimensions of flanges are rounded up to nearest figure in above table. 3. For special versions contact M/s RATHI. 4. Couplings generally used up to 120° C. Can be used for higher temperatures by using proper grade of grease.
- Page 7 GEAR-FLEX COUPLING 2.2 PRODUCT VARIANTS Coupling with Brake Drum Coupling with Brake Disc Coupling with Spacer Coupling with Shear Pin Coupling with Vertical Mounting Coupling with Floating Shaft RE-OM-G-04/00-05/15 Page 7...
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Page 8: Marking Details
GEAR-FLEX COUPLING 3. MARKING DETAILS Marking of Grade 8.8 on bolt head, Bolts e.g. (ATEX Punching) RATHI GEAR-FLEX 505 RGD-25 32 II 2GD -30° C+120ºC e.g. (Standard Punching) RATHI RGD-25 32 505 RE-OM-G-04/00-05/15 Page 8... -
Page 9: Installation
In the event of failure to keep to these values, the hub may break and the particles dispersed by the rotation may cause serious danger. 1. Rathi couplings are supplied with pilot bore unless ordered for finish bore. They should be bored to required finish bore sizes with reference of the outside diameter (OD) of hub (Refer fig. - Page 10 GEAR-FLEX COUPLING 4.3 MOUNTING PROCEDURE 1. Slide the sleeves with internal teeth with rubber O ring on shafts before mounting the hubs. 2. Mount the hubs with external teeth on their respective shafts flush with the faces of hubs as shown in Fig. 1 Fig.
- Page 11 GEAR-FLEX COUPLING 4.4 ALIGNMENT PROCEDURE Alignment procedure is given separately for each type of alignment, for simplicity. However all 3 types of misalignments may be present at the same time. For Permissible INITIAL (INSTALLATION) misalignments refer table A on page 12 For Permissible MAXIMUM (OPERATIONAL) misalignments refer table B on page 13 4.4.1 CHECKING PARALLEL / RADIAL ALIGNMENT Fig.
- Page 12 GEAR-FLEX COUPLING 4.5 ASSEMBLY PROCEDURE 1. Insert the gasket between the sleeve flanges. Position the flanged sleeves with lubrication plugs. 2. Insert the bolts thru flange holes. Also place the washer & nuts on bolts and tightening the bolts. Remember: Assemble only with the help of the fasteners supplied with the coupling.
- Page 13 GEAR-FLEX COUPLING 4.7 PERMISSIBLE MAXIMUM (OPERATIONAL) MISALIGNMENTS TABLE ‘B’ TYPE RGD TYPE RGS ANGULAR ANGULAR COUPLING PARALLEL AXIAL AXIAL SIZE /RADIAL DEG./GEAR ‘X' DEG./GEAR ‘X' (mm) STD. (mm) STD. 'P' (mm) MESH (mm) MESH (mm) (mm) (mm) ± 0.5 ± 0.25 ±...
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Page 14: Start-Up And Operations
17.3 8.65 RECOMMENDED GREASE – RATHI SPECIAL GREASE (RSG) , EXXON MOBIL EP2 , ESSO - HMP , BEACON 2 OR 3, SHELL (δg = 910 Kg/m3) If the grease quantity filled is not in accordance with the specified quantity, the coupling may become an explosion hazard. - Page 15 GEAR-FLEX COUPLING 5.2.1 BOLT TIGHTENING TORQUE TABLE ‘D’ BOLT COUPLING SIZE TIGHTENING (RGD/RGS) TORQUE Nm If the coupling is to be used below ground in potentially explosive areas, the coupling, which is made of steel, must be provided with a robust casing to avoid the risk of ignition from e.g.
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Page 16: Failures - Causes And Remedies
Caution! RATHI will not be bound by the terms of the guarantee or otherwise be responsible in cases of improper use of the coupling, modifications carried out Without RATHI’s agreement or use of spare parts not supplied by RATHI. - Page 17 Loose hubs on shaft with Torsional shock Find & eliminate causes sheared keys. overload of overload. Severe corrosion on Apply anticorrosive Chemical attack outer surface coating on coupling (*) (*) - Consult M/s RATHI if required RE-OM-G-04/00-05/15 Page 17...
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Page 18: Maintenance And Repair
GEAR-FLEX COUPLING 7. MAINTENANCE AND REPAIR For grease lubricated couplings, ensure that the recommended quantity of grease is applied on the coupling teeth (internal & external) to such an amount that the teeth are completely covered. After tightening the coupling sleeves, fill the coupling with specified amount of grease from the grease nipple by the use of grease gun. -
Page 19: Coupling Spare Components
GEAR-FLEX COUPLING 9. COUPLING SPARE COMPONENTS (RGD/RGS) COUPLING COMPONENTS SR. NO. TYPE PART NO COUPLING PARTS SLEEVE RGD FLEXIBLE GEAR COUPLING BOLTS, NUTS AND WASHERS HALF 'O' RING GASKET RIGID HUB RGS RIGID GEAR GASKET COUPLING HALF BOLTS, NUTS AND WASHERS - ONE FULL SET AS PER COUPLING SIZE RE-OM-G-04/00-05/15 Page 19...