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- Bearings for rolling mills - EVOLMEC - EVMW - 03.2018
Bearings for rolling mills - EVOLMEC - EVMW - 03.2018
Bearings for rolling mills - EVOLMEC - EVMW - 03.2018
- Description: These bearings are designed for rolling stands, offering low friction and high-speed capability, allowing for larger diameter necks compared to lamination rolls.
- Dimensions: Adhere to ISO 15:2017 standards.
- Tolerances: Precision classes P6 and P5, in line with ISO 492:2014.
- Radial Internal Clearance: Typically C3 or C4, with C2 for helical groove bearings.
- Materials and Heat Treatment: Constructed from core hardened steel 100Cr6 or 100CrMn6, with case-hardening options. Heat treatments ensure stability up to 150°C, with higher temperature options available.
- Cage Design: Made from brass, designed to minimize internal tensions and enhance performance.
- Rollers: Made from core-hardened steel, with case-hardening options.
- Various executions (4ES.1 to 4ES.17) differ in ring configurations, cage types, and lubrication features.
- Include detailed measurements and load capacities for different bearing codes and executions.
1. Materials and Heat Treatment: Inner and outer rings are made from core hardened steel 100Cr6 or 100CrMn6, with optional case-hardening. Heat treatments include annealing, hardening, and tempering, ensuring stabilization up to 150°C (S0), with options for 200°C (S1) and 250°C (S2).
2. Hardness: Rings have a hardness of 58/62 HRc, while balls and tapered rollers have a hardness of 60/64 HRc.
Design and Execution
1. Misalignment: Bearings with back-to-back ball rows can accommodate angular misalignment, which may increase noise and reduce lifespan.
2. Cages: Double-row angular contact ball bearings feature machined brass or steel cages.
3. Designations: Supplementary designations are detailed on page 27.
Dimensional Tables
1. Load Ratings and Mass: Tables provide dimensions, load ratings, and mass for various bearing codes.
2. Execution Types: Includes back-to-back and face-to-face executions.
Double Direction Tapered Roller Thrust Bearings
1. Description: These bearings support heavy axial loads in both directions, used in rolling mills.
2. Dimensions and Tolerances: Boundary dimensions are not unified, tolerances conform to ISO 492:2014.
3. Misalignment: Bearings with plane washers cannot accept shaft misalignment.
4. Executions: ESB.1 with plain central shaft washer, ESB.2 and ESB.3 with tapered raceways for greater load capacity.
Tolerances
1. Radial Bearings: Tolerances for radial bearings (except tapered roller bearings) are provided for inner and outer rings, with class P0, P6, and P5 specifications.
2. Dimensional Series: Detailed tolerances are given for various diametral series.
The document provides detailed specifications for radial and tapered roller thrust bearings, including tolerances for different classes (P0, P6, P5). It outlines the dimensional and running accuracy requirements according to ISO tolerance classes.
Procedures:
Includes tables with specific measurements for inner and outer rings, shaft washers, and housing washers, detailing maximum and minimum tolerances in micrometers for various size ranges.
Norms and Standards:
References ISO tolerance classes and specifies compliance with ISO 9001:2015 quality standards.
Recommendations:
Supplementary designations indicate specific features or treatments of the bearings, such as bainitic hardening or radial inner clearance variations.
Key Data from Tables:
- Radial bearings have specified tolerances for inner and outer rings across different size ranges.
- Tapered roller thrust bearings have detailed tolerances for bearing height and shaft/housing washers.
- Supplementary designations provide additional information on bearing features and treatments.
Contact Information:
EVOLMEC's contact details and office locations in Italy are provided, along with their commitment to quality management.
Catalog excerpts
Bearings for rolling mills
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Four-row cylindrical roller bearings Technical features Executions Dimensional tables Single-row deep groove ball bearings Technical features Dimensional tables Double-row angular contact ball bearings Technical features Executions Dimensional tables Double direction tapered roller thrust bearings Technical features Executions Dimensional tables Bearing data Tolerances for radial bearings (except tapered roller bearings) EVOLMEC ® S.r.l. Evoluzione Meccanica All rights reserved. The reproduction, even partial, of the contents of this catalogue is not authorized without our permission. EVMW-03/2018,...
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Four-row cylindrical roller bearings Four-row cylindrical roller bearings Technical features Description Four-row cylindrical roller radial bearings are used almost exclusively in the rolling stands. They have a lower friction than the other roller bearings and they are suitable for applications where high speeds are required. The reduced radial encumbrance of these bearings lets the adoption of big diameter necks compared to lamination roll. In the four-row cylindrical roller bearings, rollers are driven on the outer ring between integrals edges or not integrals. The inner ring is devoid of...
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Four-row cylindrical roller bearings Four-row cylindrical roller bearings Two outer rings each with three integral flanges. One inner ring. Two roller guided double pronged machined brass cages. With or without annular groove and/or lubricating holes in the outer rings (see dimensional tables of bearings, dimensions b and k). One outer ring with five integral flanges. One inner ring. Four roller guided pronged cages of brass. With annular groove and lubricating holes in the outer ring (see dimensional tables of bearings, dimensions b and k). EXECUTION 4ES.2 Two outer rings each with three integral...
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Four-row cylindrical roller bearings Four-row cylindrical roller bearings Dimensional tables Dimensional tables Dimension table EVOLMEC 8 • Four-row cylindrical roller bearings Four-row cylindrical roller bearings •
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Four-row cylindrical roller bearings Four-row cylindrical roller bearings Dimensional tables Dimensional tables Dimension table EVOLMEC 10 • Four-row cylindrical roller bearings Four-row cylindrical roller
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Single-row deep groove ball bearings Single-row deep groove ball bearings Technical features Technical features Inner and outer rings Single-row deep groove ball bearings are the most common type of rolling bearings. Their range of application is very wide. The raceway grooves in both the inner and outer rings have circular arcs of slightly larger radius than that of the balls. Their straight forward basic design has many advantages: Material: Core hardened steel 100Cr6 (UNI 3097 – WNr. 1.3505) or 100CrMn6 (WNr.1.3520) according to the sizes. On request and for special applications they can be...
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Single-row deep groove ball bearings Single-row deep groove ball bearings Dimensional tables Dimensional tables Dimension table Dimension table EVSR 0100 EVSR 0101 EVSR 0102 EVSR 0103 EVSR 0104 EVSR 0105 EVSR 0106 EVSR 0107 EVSR 0108 EVSR 0109 EVSR 0110 EVSR 0111 EVSR 0112 EVSR 0113 EVSR 0114 EVSR 0115 EVSR 0116 EVSR 0117 EVSR 0118 EVSR 0119 EVSR 0120 EVSR 0121 EVSR 0122 EVSR 0123 EVSR 0124 EVSR 0125 EVSR 0126 EVSR 0127 EVSR 0128 EVSR 0129 EVSR 0130 EVSR 0131 EVSR 0132 EVSR 0133 EVSR 0134 EVSR 0135 EVSR 0136 EVSR 0137 EVSR 0138 EVSR 0139 EVSR 0140 HA = retaining groove in the outer ring HA =...
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Double-row angular contact ball bearings Double-row angular contact ball bearings Technical features Inner and outer rings Two single row angular contact ball bearings, when duplexed back-to-back so that the inner ring forms one piece, are used to create double row angular contact ball bearings. Alternatively, the bearings may be duplexed face-to-face with the outer ring as one piece. Material: Core hardened steel 100Cr6 (UNI 3097 – WNr. 1.3505) or 100CrMn6 (WNr.1.3520) according to the sizes. On request and for special applications they can be manufactured in case-hardening steel. These bearings...
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Double-row angular contact ball bearings Double-row angular contact ball bearings Dimensional tables Dimensional tables Dimension table EVOLMEC Dimension table EVSAD 0100 EVSAD 0101 EVSAD 0102 EVSAD 0103 EVSAD 0104 EVSAD 0105 EVSAD 0106 EVSAD 0107 EVSAD 0108 EVSAD 0109 EVSAD 0110 EVSAD 0111 EVSAD 0112 EVSAD 0113 EVSAD 0114 EVSAD 0115 EVSAD 0116 EVSAD 0117 EVSAD 0118 EVSAD 0119 EVSAD 0120 EVSAD 0121 EVSAD 0122 EVSAD 0123 EVSAD 0124 EVSAD 0125 EVSAD 0126 EVSAD 0127 EVSAD 0128 EVSAD 0129 EVSAD 0130 EVSAD 0131 EVSAD 0132 EVSAD 0133 EVSAD 0134 EVSAD 0135 EVSAD 0136 EVSAD 0137 EVSAD 0138 EVSAD 0139...
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Double direction tapered roller thrust bearings Double direction tapered roller thrust bearings Technical features Double direction tapered roller thrust bearings allow the realization of compact axial systems. The bearings of this type can support extremely heavy axial loads in both direction and they are insensitive to impacts. Material: Core hardened steel 100Cr6 (UNI 3097 – WNr. 1.3505) or 100CrMn6 (WNr.1.3520) according to the sizes. On request and for special applications they can be manufactured in case-hardening steel. Two types of executions exist: They are mainly used to support the...
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Double direction tapered roller thrust bearings Double direction tapered roller thrust bearings Dimensional tables Dimensional tables EVOLMEC-SKF Adjacent dimensions D1 22 • Double direction tapered roller thrust bearings Double direction tapered roller thrust bearings • 2
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Bearing data Bearing data Tolerances for radial bearings (except tapered roller bearings) Tolerances for radial bearings (except tapered roller bearings) RADIAL BEARINGS Normal (P0), P6 And P5 Tolerances - INNER RING Class P0 tolerances for radial bearings (except tapered roller bearings) Δdmp Diametral series OUTER RING - Normal (P0), P6 And P5 Tolerances Class P0 tolerances for radial bearings (except tapered roller bearings) RADIAL BEARINGS Class P6 tolerances for radial bearings (except tapered roller bearings) Class P6 tolerances for radial bearings (except tapered roller bearings) Δdmp...
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