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Rossi S.p.A.
SR series catalog

SR series catalog

Product catalog summary

Introduction
This document provides comprehensive information on the SR series of servo gear reducers, including worm, coaxial, helical, and bevel helical units. It covers specifications, designations, selection tables, and structural details for each type of gear reducer.

1. Company Overview
Rossi S.p.A., established in 1953, is a prominent manufacturer of gearmotors and gear reducers, known for high-quality solutions and customer satisfaction. The company offers a wide range of products, focusing on innovation and reliability.

2. Product Specifications
The SR series includes servo gear reducers designed for high torsional stiffness and low angular backlash, suitable for demanding applications. They feature a compact design, high torque capacity, and compatibility with various servo motors.

3. Worm Servo Gear Reducers
This section details specifications, designations, and selection tables for worm servo gear reducers, including designs, dimensions, mounting positions, and load capacities.

4. Coaxial Servo Gear Reducers
Specifications, designations, and selection tables for coaxial servo gear reducers are provided, highlighting design features and load capacities.

5. Helical and Bevel-Helical Servo Gear Reducers
This section covers specifications and selection tables for helical and bevel-helical gear reducers, including input side mating dimensions and load capacities.

6. Installation and Maintenance
Comprehensive guidelines for installation and maintenance of servo gear reducers are provided, including safety instructions and lubrication requirements.

7. Technical Formulae
This section includes technical formulae relevant to the operation and selection of gear reducers.

Conclusion
The SR series of servo gear reducers by Rossi S.p.A. offers versatile and reliable solutions for various industrial applications, with a focus on quality and customer satisfaction.

Specifications:
The document outlines specifications for servo gear reducers with direct coupling and bell housing, including gear stages, ratios, and torque capacities.

Procedures:
The selection process involves determining maximum output speed and torque, with formulas provided for calculating transmission ratios and verifying torque conditions.

Standards and Recommendations:
Emphasis is placed on minimizing acceleration values and optimizing transmission ratios based on inertia.

Key Data and Symbols:
A comprehensive list of symbols and units related to servo gear reducers is included, along with a table for stiffness and precision levels.

Critical Information:
Verification of equivalent torque and emergency torque requirements is crucial to prevent damage during operation.

Specifications and Requirements:
Details on MR and R types of servo gear reducers, including sizes, configurations, and transmission ratios, are provided.

Emergency Torque and Load Verification:
Verification of emergency torque and load conditions is essential, with formulas provided for calculating equivalent loads.

Positioning Accuracy:
Ensuring positioning error is within acceptable limits is emphasized, with a formula provided for calculation.

Design and Construction Details:
Details on worm gear pairs, materials, coatings, and lubrication systems are provided.

Selection and Designation:
Selection tables and designations for different configurations and sizes are included.

Specifications:
Specifications for worm servo gear reducers, including load capacities and efficiency values, are detailed.

Procedures:
Installation and maintenance instructions, including bolt tightening and expansion tank requirements, are provided.

Standards and Norms:
Standards for bolt dimensions and plug positions are outlined.

Recommendations:
Recommendations for evaluating angular backlash and aligning it with the transmission system are included.

Key Data from Tables:
Tables provide maximum values for angular backlash and torsional stiffness.

Critical Information:
Efficiency considerations during initial operation and cold starts are highlighted.

Irreversibility:
Conditions for dynamic and static irreversibility are explained.

Torque Arm Specifications:
Details on torque arm accessories and non-standard design codes are provided.

Accessories and Non-standard Designs:
Information on washers, circlips, locking rings, and bushes for axial fastening is included.

Miscellaneous Features:
Features such as threaded hollow low-speed shafts and special seal rings are discussed.

Strengthened Low Speed Shaft Bearings:
Available for sizes 63 to 126, supporting increased loads.

Coaxial Servo Gear Reducers Specifications:
Specifications for direct coupling with servo motors, including sizes and angular backlash classes, are provided.

Mounting and Designation:
Universal mounting options and designations based on size and configuration are included.

Selection Tables:
Technical data for various sizes and configurations are provided.

Overview: Detailed technical specifications and selection tables for coaxial servo gear reducers, focusing on the MR series, are provided.

Specifications: Technical data for servo gear reducers at a rotational speed of n1 = 3,000 min-1 is outlined.

Selection Tables: Comprehensive lists of gear reducer models with specific characteristics are included.

Key Data Points: Gear ratio, inertia, and torque values are highlighted.

Recommendations: Selection based on application requirements is advised.

Specifications:
Specifications for radial and axial loads on low-speed shaft ends are outlined.

Procedures:
Details for fitting shaft ends with keys and locking mechanisms are provided.

Standards and Tolerances:
Tolerances for shaft diameters and keyway depths are specified.

Recommendations:
Evaluation of angular backlash values is recommended.

Key Data from Tables:
Dimensions for shaft ends and efficiency ratings are included.

Structural and Operational Details:
Structural details of servo gear reducers are described.

Accessories and Non-standard Designs:
Information on low-speed shafts and stepped hollow shafts is provided.

Specifications:
Specifications for coupling systems involving servo gear reducers are outlined.

Procedures:
Ordering details for stepped hollow low-speed shafts are provided.

Accessories and Non-standard Designs:
Information on hollow low-speed shafts with shrink discs is included.

Mounting Arrangements:
Details on shaft-mounting arrangements are provided.

Flange Options:
Two types of B5 flanges are available with mounting instructions.

Protection and Additional Components:
Options for washers, locking rings, and protection caps are discussed.

Tables and Figures:
Tables detailing dimensions and specifications for various components are included.

Specifications:
Specifications for hollow low-speed shaft protection are outlined.

Procedures:
Installation and maintenance instructions are provided.

Standards and Recommendations:
Adherence to safety standards and directives is emphasized.

Safety Instructions:
General safety instructions are provided.

Installation and Maintenance:
Guidelines for installation and maintenance are detailed.

Key Data from Tables:
Specific measurements and torque values are provided.

Specifications:
Specifications for lubrication and maintenance of servo gear reducers are outlined.

Procedures:
Guidelines for oil filling and maintenance are provided.

Standards and Recommendations:
Recommendations for synthetic oils and oil-change intervals are included.

Warnings:
Caution is advised when handling certain sizes.

Technical Formulae:
Technical formulae related to mechanical drives are included.

Revisions:
Revisions made in February 2013 are listed.

Overview: A comprehensive catalog of gear reducers, gearmotors, and motors offered by Rossi S.p.A. is provided.

Catalogs and Products:

Extruders: Catalog GX focuses on parallel shaft gear reducers and gearmotors for extruders.
Gear Reducers: Multiple catalogs cover different types of gear reducers.
Gearmotors: Various catalogs list different types of gearmotors.
Motors: Catalog TX includes asynchronous three-phase brake motors.
Automation: Catalog SR details servo gear reducers.

Customer Responsibility: The customer is responsible for selecting and applying products correctly based on their needs.

Disclaimer: Rossi S.p.A. disclaims responsibility for errors or outdated data in the catalog.

Contact Information: Rossi S.p.A. is located in Modena, Italy, and can be contacted for further inquiries.

Catalog excerpts

Servo riduttori (a vite, coassiali, assi paralleli e ortogonali) Servo gear reducers (worm, coaxial, helical and bevel helical units)

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Your worldwide partner Your worldwide partner Your worldwide partner for high quality solutions Your worldwide partner for high quality solutions Product range Simboli e unità di misura Symbols and units of measure Servo riduttori a vite Worm servo gear reducers 3.1 Caratteristiche 3.2 Designazione 3.3 Tabelle di selezione (MR) 3.1 Specifications 3.2 Designation 3.3 Selection tables (MR) 3.4 Esecuzioni, dimensioni, forme costruttive e quantità d'olio (MR) 3.4 Designs, dimensions, mounting positions and oil quantities (MR) 3.6 Esecuzioni, dimensioni, forme costruttive e quantità d'olio (R) 3.6...

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Your worldwide partner for high quality solutions Year of foundation as family business and today still privately owned First in Italy to adopt a complete modular system for gear reducers with cylindrical and bevel gears; ﬁrst in Italy to adopt case-hardened, tempered, ground gear pairs on parallel and right angle shaft gear reducers Worm gear reducers and gearmotors with universal mounting, single-piece housing and ZI involute proﬁle; extension of the direct sales organization abroad with the facilities of the German, English, French and Spanish subsidiaries. Parallel and right angle shaft gear...

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What we do Our wide standard product range and design allows us to provide the customer with the right engineered solution for every application including a 3 year worldwide warranty. Gearmotors Type of gear Worm gearmotors Standardﬁt worm gearmotors Coaxial gearmotors Standardﬁt coaxial gearmotors Helical and bevel helical gear reducers Planetary (in-line and bevel helical) gearmotors Gear reducers Type of gear Worm gear reducers Helical gear reducers Bevel Helical gear reducers Heavy duty helical gear reducers Heavy duty bevel helical gear reducers Planetary (in-line and bevel helical) gear...

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Motors Type Asynchronous three-phase high efﬁciency and premium efﬁciency motors Standard and high efﬁciency brake motors Motion control Type Worm, coaxial, helical and bevel helical servo gear reducers Speciﬁc industrial segments Type Extruders, Parallel shaft gear reducers and gearmotors Combined units Slewing drives Heavy duty gear reducers on swing bases

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Where you can ﬁnd us Close to our customers in all ﬁve continents, with a direct sale system granting excellence in service: visit our new website for your country reference. We are where you need us to be. What we believe in Choosing the drive with the right technical speciﬁcations is vital for reliability and economy. We believe in integrity, ethical behavior, knowledge, imagination, innovation, good teamwork and above all customer focus: these are some of Rossi’s major key success factors. Rossi is a reliable company with the right ﬂexibility and knowhow to respond to all market requests,...

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Ampia gamma di servo riduttori senza motore in esecuzione specifica per automazione, con minimi ingombri. Dimensionati in ogni parte per la massima rigidezza torsionale e il minimo gioco angolare, per elevati momenti torcenti e carichi radiali Wide range of servo gear boxes without motor specifically designed for motion control, with minimum overall dimensions. Designed for the highest torsional stiffness and the lowest angular backlash, for the maximum torque and overhung loads Bush with slots and hub clamp for servo motor coupling Bussola con intagli e collare di bloccaggio per accoppiamento...

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Flange standard per attacco servomotori Albero veloce: collegamento servo motore mediante giunto con elastomero, torsionalmente rigido Input shaft: with torsionally rigid elastomer coupling Output shaft: smooth solid shaft with or without key; hollow shaft with keyway or with shrink discs Albero lento: integrale con o senza linguetta; cavo con cava linguetta o con unità di bloccaggio • Programma di fabbricazione e tipologia di prodotti in grado di garantire l'accoppiabilità con tutti i servo motori presenti sul mercato, con prodotti standard • Elevata stabilità e rigidezza del collegamento riduttore...

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Product range Serie di servo riduttori (a vite, coassiali, ad assi paralleli e ortogonali) senza motore in esecuzione speciﬁca SR per automazione, dimensionati in ogni parte per la massima rigidezza torsionale e il minimo gioco angolare, per trasmettere elevati momenti torcenti e sopportare elevati carichi sull'estremità d'albero lento Series of servo gearmotors (with worm gear, coaxial, parallel and right angle shafts) without motors, in a speciﬁc design SR for motion control, carefully designed for the highest torsional stiffness and the lowest angular backlash, to transmit maximum accelerating...

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Product range Gioco massimo: – ridotto р 7 arcmin n1max = 3 550 min-1 Grandezze: - servo riduttori ad accoppiamento diretto 32 ... 81 - servo riduttori ad accoppiamento con campana e giunto 40 ... 126 Rotismi: V, IV Rapporti: - servo riduttori ad accoppiamento diretto 7 ... 239 - servo riduttori ad accoppiamento con campana e giunto 7 ... 127 MA2 р 2 700 N m Max backlash: – reduced ഛ 7 arcmin n1max = 3 550 min-1 Sizes: - servo gear boxes direct coupling 32 ... 81 - servo gear boxes with bell housing and coupling 40 ... 126 Gear stage: V, IV Ratios: - servo gear boxes direct coupling 7 ... 239...

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Product range Assi paralleli Parallel shafts Gioco massimo: – ridotto р 7 arcmin n1max = 3 550 min-1 Grandezze: - servo riduttori ad accoppiamento diretto 40 ... 125 - servo riduttori ad accoppiamento con campana e giunto 50 ... 125 Rotismi: 2I, 3I Rapporti: - servo riduttori ad accoppiamento diretto 6,42 ... 110 - servo riduttori ad accoppiamento con campana e giunto 6,42 ... 123 MA2 р 3 000 N m Max backlash: – reduced ഛ 7 arcmin n1max = 3 550 min-1 Sizes: - servo gear boxes direct coupling 40 ... 125 - servo gear boxes with bell housing and coupling 50 ... 125 Gear stage: 2I, 3I Ratios: - servo...

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All Rossi S.p.A. catalogs and technical brochures

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