ASME SRB-1:2018 pdf free download

ASME SRB-1:2018 pdf free download.Design, Installation, Maintenance, and Application of Ball Slewing Ring Bearings.
ASME SRB-1 applies to the design, application. Installation, Inspection requirements, and maintenance of slewing ring bearings (SRIIs) using balls that do not require dynamic capacity-life ratings. These also may be called slewing rings. This is inclusive of four-point contact single-row and double-row ball bearings. Such bearings are used in. but not limited to, equipment such as hydraulic shovels, excavators, aerial platforms (manlifts). cranes, wind-power generators, building maintenance units (UMU5). and other equipment where one part of the structure must rotate with respect to another In an oscillating or indexing manner.
1.2 Purpose
The purpose of this Standard is to define standard methods to evaluate variables and establish practices for satisfactory performance In ball SRBs In oscillating or indexing applications. This will allow effective communication and exchange of data among the user, installer. and SRB manufacturer such that all parties understand each other’s requirements and have a common point of reference.
Certain parameters are standardized to reduce the potential for confusion between the SRB manufacturer and the user. Acceptance criteria and guidelines are provided for SRB design, material, Inspection requirements, and application.
1.3 References
The following publications are referenced in this Standard, Unless otherwise specified, the latest edition shall apply.
ABMA bA. Metal Balls for Unground Bearings and Other Uses
Publisher: American Hearing Manufacturers Association (ABMA), 330 North Wabash Avenue, Suite 300. Chicago, IL 60611 (www.amerlcanbearings.org)
ISo 3290-I. Rolling hearings — RaIls — Part 1: Steel halls Publisher: International Organization for Standardization (ISO), Chemin de Blandonnet 8, Case Postale 401, 1214 Vernier, Geneva, Switzerland (www.iso.org)
(3) Acoustic Emission Anafrsis. An acoustic emission analysis may be conducted. If this type of inspection Is utilized, the analysis should be performed by a qualified person on a regular basis and compared with a baseline analysis performed when the SRB was initially installed.
(4) Ultrasonic Testing (UT) inspection. If this type of inspection Is utilized, the analysis should be performed by a qualified person on a regular basis and compared with a baseline analysis performed when the SRB was initially installed.
(5) Torque Required to Rotate. A test that measures the torque required to rotate the machine in a specified loading condition maybe conducted. Typically, the tarque is not directly measured but instead the current, voltage. or pressure required from the mating gear drive motor is measured instead. If this type of Inspection is utilized, the analysis should be compared to previous tests and to a baseline analysis performed when the SRH was initially installed.
(6) Disassembly and Internal Visual Inspection, When indicated by other inspections, bearing disassembly and internal Inspection may be required. If this type olinspection is performed, it is recommended that a representative of the equipment manufacturer or qualified repair service be consulted in conjunction with the SRB manufacturer.
(7) Nondestructive Testing of Gear Teeth. When indicated by visual inspections, nondestructive testing (e.g.. magnetic particle testing, liquid penetrant testing) of gear teeth may be required. If this type of inspection is performed, it shall be performed by a qualified person.
9 CRITERIA FOR DETERMINING THE END OF A BEARING’S USEFUL LIFE
9.1 PotentIal Failure Modes
SRBs may experience several failure modes. The useful life of the bearing ends before any of these failure modes are reached The inspection plan to monitor for the inception of these failure modes and criteria must be developed todeterniine the end of the useful life of the bearing before any condition that renders the bearing and equipment unusable, or results In a catastrophic failure, is reached. Gradual failure results from failure of the rolling elements and race surfaces and may be exhibited by increasing torque, noise, and internal clearances, along with the presence of Increasing size and amount of wear particles In the lubricant. Sometimes gear wear will also be present.
9.2 End of UsefuL Life
The end of the slewing ring bearing’s useful life should be agreed upon by the owner or end user olthc’ equipment and the equipment manufacturer in conjunction with the SRB manufacturer. The end of an SRB’s useful life may be defined by any of the following.