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ELASTIC COUPLINGS

ELASTIC COUPLINGS
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ELASTIC COUPLINGS

Product catalog summary
Overview: This document is a technical catalog from Eltra S.p.a. Unipersonale, detailing their range of standard and special application elastic couplings. These components are crucial for motion transmission to encoder shafts, offering torsional rigidity, compensation for shaft misalignments, and absorption of axial play.
Standard Elastic Couplings: The standard elastic couplings are made from aluminum alloy and feature a cylindrical body with a helical groove. They are available in various diameters and are identified by an ordering code that specifies the series, model, shaft fixing type, and hole diameters. The document provides a table with mechanical dimensions and torque specifications for different models, such as G 20 A 6 and G 25 A 8.
Special Application Elastic Couplings: These couplings are designed for extreme conditions, such as high torque or severe axial/radial play. The document lists several series, including:
  • GS-DA Series: Double loop plastic couplings with medium torsional stiffness and vibration damping.
  • GS-EA Series: Heavy-duty helix couplings for backlash-free transmission with high torsional stiffness.
  • GS-EP Series: Low-cost shaft couplings with medium torsional stiffness and vibration damping.
  • GS-M Series: Multi-purpose couplings for backlash-free transmission with high vibration damping.
  • GS-O Series: Elastic couplings with a central disc for rotation transmission, offering radial compensation.
  • GS-S Series: Bellows couplings for backlash-free transmission with high torsional stiffness.
Technical Data: The document includes a table with technical specifications for various coupling models, such as maximum speed, torque, offset capabilities, moment of inertia, clamping torque, temperature range, weight, and materials used for flanges and inserts.
Conclusion: Eltra's elastic couplings are versatile components designed for a range of applications, offering solutions for standard and specialized needs. For specific requirements or models not listed, the document advises contacting Eltra directly.
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Catalog excerpts

ELASTIC COUPLINGS-1

ilfcr'a® f&Msd ELASTIC COUPLINGSSTANDARD AND SPECIAL APPLICATION COUPLINGS STANDARD ELASTIC COUPLINGS Eltra elastic couplings are essential parts for motion transmission to the encoder shaft. Couplings are aluminium alloy made and are composed by a cylindrical body on which there is a helical groove that determines: • torsional rigidity • ability to compensate for slight shaft misalignments • ability to absorb shaft axial play Elastic coupling can be supplied with different coupling diameters Ordering code example: G 25 A 8 / 10 means d1 = 8 mm, d2 = 10 mm STANDARD ELASTIC COUPLINGS ORDERING CODE G 25 A 6 / 8 SERIES precision elastic coupling G MODEL (see table) 20 (see table) 25 (see table) 30 SHAFT FIXING TYPE shaft fixing with grub screw A HOLE DIAMETER d1 0 6 mm 6 (mod. G25 / G30) 0 8 mm 8 0 9,52 (3/8”) mm 9 0 10 mm 10 (DO NOT ADD IF d2 = d1) HOLE DIAMETER d2 0 6 mm 6 (mod. G25 / G30) 0 8 mm 8 0 9,52 (3/8”) mm 9 0 10 mm 10 STANDARD COUPLINGS For proper installation it is recommended to insert shafts in the coupling observing “E” dimensions. Itna" © Copyright 2016 Eltra S.p.a. Unipersonale. All rights reserved. All informations in this catalog are subject to change without notice. Eltra takes no responsibility for typographic errors. For the terms of sales please check the website. REV. 160607 238

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ELASTIC COUPLINGS-2

SPECIAL APPLICATION ELASTIC COUPLINGS Special application couplings are designed to meet extreme coupling conditions such as high torque or severe axial or radial play. Please refer to single product description to identify right elastic coupling for your application. GS-DA SERIES GS-DA series are double loop plastic coupling with medium torsional stiffness, low restoring forces with impact and vibration damping effect. It allows a smooth running, maintenance-free motion and a reliable compensation of radial, lateral and angular misalignments. It is also thermally and electrically insulated....

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ELASTIC COUPLINGS-3

TECHNICAL DATA © Copyright 2016 Eltra S.p.a. Unipersonale. All rights reserved. All informations in this catalog are subject to change without notice. Eltra takes no responsibility for typographic errors. For the terms of sales please check the website. REV. 160607

 Open the catalog to page 3

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