# Visual credits and changes / Créditos de imagens / Créditos de imágenes ## motor-damage.webp Author / Autor: Donald Huebler / NASA, via NARA (NAID 17469411). Date: 1977-07-27. Source: https://commons.wikimedia.org/wiki/File:DAMAGED_MOTOR_BEARING_-_NARA_-_17469411.jpg License: [Public domain (NASA / US federal work)](https://commons.wikimedia.org/wiki/Template:PD-USGov-NASA). Changes: Full-frame conversion to WebP; no crop, no retouch; licensed derivatives retain source license. PT: Conjunto de motor em fotografia de arquivo da NASA, catalogada como “Damaged motor bearing”. A vista mostra o conjunto, não um diagnóstico da superfície do rolamento. Donald Huebler/NASA–NARA, 1977; domínio público nos EUA. EN: NASA archival motor assembly photograph, catalogued as “Damaged motor bearing”. This assembly view does not diagnose the bearing surface. Donald Huebler/NASA–NARA, 1977; US public domain. ES: Conjunto de motor en fotografía de archivo de NASA, catalogada como “Damaged motor bearing”. La vista del conjunto no diagnostica la superficie del rodamiento. Donald Huebler/NASA–NARA, 1977; dominio público en EE. UU. ## ball-pitting.webp Author / Autor: Campo17. Date: 2012-08-12. Source: https://commons.wikimedia.org/wiki/File:Pitting_su_sfera_di_cuscinetto.jpeg License: [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/). Changes: Full-frame conversion to WebP; no crop, no retouch; licensed derivatives retain source license. PT: Esfera de rolamento de bicicleta com dano superficial localizado, descrito pelo autor como pitting por fadiga. A causa de uma falha industrial exige evidências adicionais. Campo17; CC BY-SA 3.0. Conversão WebP sem recorte; mesma licença. EN: Bicycle bearing ball with local surface damage, described by the author as fatigue pitting. An industrial failure requires additional evidence for causal diagnosis. Campo17; CC BY-SA 3.0. Uncropped WebP conversion under the same license. ES: Bola de rodamiento de bicicleta con daño superficial localizado, descrito por el autor como pitting por fatiga. Una falla industrial exige evidencias adicionales para diagnosticar su causa. Campo17; CC BY-SA 3.0. Conversión WebP sin recorte; misma licencia. ## false-brinelling.webp Author / Autor: Fabian Schwack. Date: 2017-06-23. Source: https://commons.wikimedia.org/wiki/File:False_brinelling_schwack.png License: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/). Changes: Full-frame conversion to WebP; no crop, no retouch; licensed derivatives retain source license. PT: Micrografia de pista de rolamento identificada pelo autor como falso brinelamento. A perda superficial por micromovimentos não se confunde com indentação plástica por sobrecarga. Fabian Schwack; CC BY-SA 4.0. Imagem integral convertida em WebP, mesma licença. EN: Bearing raceway micrograph identified by the author as false brinelling. Surface wear from small movements differs from plastic indentation caused by overload. Fabian Schwack; CC BY-SA 4.0. Full-frame WebP conversion under the same license. ES: Micrografía de pista de rodamiento identificada por el autor como falso brinelado. El desgaste por micromovimientos difiere de la indentación plástica por sobrecarga. Fabian Schwack; CC BY-SA 4.0. Imagen íntegra convertida a WebP, misma licencia. ## fretting-false-brinelling.webp Author / Autor: Felix Prigge, Fabian Schwack, Artjom Byckov. Date: 2017-03-23. Source: https://commons.wikimedia.org/wiki/File:Fretting_And_FalseBrinelling_Schwack_Byckov.png License: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/). Changes: Full-frame conversion to WebP; no crop, no retouch; licensed derivatives retain source license. PT: Comparação documental de regiões com falso brinelamento e fretting, conforme identificação dos autores; painéis e barra de escala originais preservados. Felix Prigge, Fabian Schwack e Artjom Byckov; CC BY-SA 4.0. WebP sem recorte, mesma licença. EN: Documentary comparison of false-brinelling and fretting regions, as identified by the authors; original panels and scale bar retained. Felix Prigge, Fabian Schwack and Artjom Byckov; CC BY-SA 4.0. Uncropped WebP under the same license. ES: Comparación documental de regiones con falso brinelado y fretting, según los autores; paneles y escala originales conservados. Felix Prigge, Fabian Schwack y Artjom Byckov; CC BY-SA 4.0. WebP sin recorte, misma licencia. ## og-pt.jpg, og-en.jpg, og-es.jpg Whole NASA motor assembly photograph (Donald Huebler / NASA–NARA, NAID 17469411, 1977) placed on an editorial canvas with localized text. US public-domain source; no endorsement implied. No bearing damage digitally added. ## Diagram revisions - Original five supplied SVGs preserved byte-for-byte in originals/. - Published diagrams are revised, translated code-native SVGs; no AI-generated photos. - Component sketch corrected ball/ring geometry and separated enlarged lubrication contact. - Load curve uses P/Pref on x and L10/L10,ref on y with exact power relation; no P/C normalization mismatch. - Diagnostic branches are hypotheses, not automatic causal diagnosis. Corrosion and electrical damage are separate rows. - Speed plot is exact unit conversion for fixed L10 = 125 million revolutions. - No manufacturer copyrighted PDF photos reused. - NASA full motor assembly is contextual, not a detailed image of bearing damage. - False brinelling micrograph is tall; render full frame with contain, never crop.