CYLINDRICAL ROLLER BEARING FOR WATERVLIET ARSENAL

Statement of Work For Schaeffler YRTCMA460-03-1760-XL Axial-Radial Cylindrical Roller Bearings 1.0 Description: This Statement of Work defines the technical requirements and specifications for a quantity of two (2) Schaeffler YRTCMA460-03-1760-XL Axial- Radial Cylindrical Roller Bearings. The bearings are required for use in a high-precision rotary application requiring integrated absolute angular position feedback. This statement of work’s defined requirements and deliverables are to be used in the selection and procurement of a quantity of two (2) Schaeffler YRTCMA460-03-1760-XL Axial-Radial Cylindrical Roller Bearings. 2.0 Scope: The scope of this project includes a quantity of two (2) Axial-Radial Cylindrical Roller Bearings, all necessary accessories, sensor hardware, and/or software, and technical documentation needed for proper installation and operation detailed in the requirements section of this statement of work. 3.0 Product Description: 3.1 Designs and Variants: YRTC series bearings are ready-to-fit, high-precision units designed for rotary table and spindle applications. They are pre-greased, sealed, and feature high tilting stiffness, accommodating radial loads, axial loads from both directions, and tilting moments without clearance. The XL designation signifies Schaeffler's "X-life" premium quality, offering higher load ratings and longer service life. 3.2 Designation System: The designation YRTCMA460-03-1760-XL is broken down as follows: Component Designation Meaning Basic Series YRTC Identifies the bearing series: Axial-radial bearing for rotary tables. Measuring System M Indicates the bearing is equipped with an integrated angle measuring system. System Principle A Denotes an Absolute angle measuring system. Bore Diameter 460 The bearing bore diameter in millimeters. Measuring System Variant 03-1760 A manufacturer-specific code defining the measuring system's protocol and properties. In this case, it specifies the EnDat 2.2 interface. Quality Standard XL Schaeffler’s "X-life" premium quality with enhanced performance. -- 1 of 3 -- 4.0 Requirements: The contractor shall provide a final product that conforms to the following minimum required specifications: 4.1 Dimensions: Parameter Symbol Nominal Dimension (mm) Tolerance (μm) Bore Diameter d 460 0 / -23 Outside Diameter D 600 0 / -28 Bearing Height H 70 Outer Ring Shoulder Diameter D1 560.9 max Inner Ring Mounting Hole P.C.D. J 482 Outer Ring Mounting Hole P.C.D. J1 580 Width of outer ring C 22 Axial and Radial Run-out of outer and inner ring ≤ 6 Weight 45.21 kg 4.1.1 Tolerance Classes: Schaeffler high-precision bearings are manufactured to tight tolerances. The XL standard for this series ensures a running accuracy that is superior to the DIN P4 or ISO 4 tolerance class, making them suitable for the most demanding machine tool applications. 4.2 Performance Specifications: Parameter Symbol Value Limiting speed (Grease lubrication) nG 150 r/min Bearing Friction Torque at 5 r/min M R 25 Nm Basic dynamic load rating - axial C a 290 kN Basic static load rating - axial C 0a 2,500 kN Basic dynamic load rating - radial C r 265 kN Basic static load rating - radial C 0r 880 kN Tilting moment stiffness ckL 686,000 Nm/mrad Axial stiffness caL 24,000 N/μm Radial stiffness crL 9,100 N/μm 4.3 Features 4.3.1 Integrated Angular Measurement System: The specified bearing includes a fully integrated, factory-sealed absolute angle measuring system. Its features are fixed by the part number and are detailed below. Specification Requirement & Governing Standard System Type Integrated absolute angular encoder (calibrated unit with encapsulated reading head and dimensional scale). -- 2 of 3 -- System Accuracy ±4.4 arc-seconds or better. Communication Protocol EnDat 2.2 digital interface, as dictated by the -03-1760 suffix. Power Supply 3.6 to 14 VDC. 1.5W Environmental Protection IP67 according to IEC 60529. EMC Compliance EN 61000-6-2 (Immunity) and EN 61000-6-4 (Emissions). Electrical Connection Integrated 8-pin M23 flange socket for power and data. 5.0 Hardware Deliverables 5.1 The contractor shall produce and deliver the following components meeting the requirements and specifications listed in this Statement of Work: 5.1.1 Two (2) YRTCMA460-03-1760-XL Axial-Radial Cylindrical Roller Bearings with integrated absolute angular position feedback. 6.0 Written Deliverables 6.1 The contractor shall prepare and provide certificate of compliance for all the components that are stated in section 3.0 & 4.0. (DI-MISC-81356A) 6.2 The contractor shall provide all instruction, operating, and maintenance manuals for each component stated in section 3.0 & 4.0. 6.3 The contractor shall provide technical information, drawings, 3D Models, and requirements for each component stated in section 4.0. 7.0 Warranty 7.1 The Contractor shall offer a standard commercial warranty, including onsite service warranty on labor, parts, and materials for a minimum period of one (1) year from the date of installation. Additionally, the contractor shall provide application and technical support free of charge. 8.0 Final Acceptance: 8.1 Shall be done at Watervliet Arsenal upon completion of inspection. 9.0 General Requirements and Information 9.1 The Delivery shall be thirty-eight (38) weeks from the date of award. 9.2 This effort is Unclassified. -- 3 of 3 --