{"publication_id":"OT-2026-000000044","uuid":"01a0a4e2-f908-73d4-87d5-8f29b904e439","title":"Slewing Ring Bolt Preload Monitoring System Using Load-Sensing Washers","abstract":"This disclosure describes an arrangement for monitoring the preload of mounting bolts securing a slewing ring. The system utilizes a subset of load-sensing washers integrated with select bolts to measure axial clamping force. By acquiring and analyzing these preload signals over time, the system can detect progressive bolt loosening, which, if unaddressed, can lead to uneven load distribution and eventual structural failure of the slewing ring. Early detection of preload degradation enables proactive maintenance, ensuring the continued structural integrity and safe operation of the assembly.","language":"en","published_at":"2026-09-15T11:45:33.452725Z","canonical_url":"https://opentechnical.org/p/OT-2026-000000044","status":"PUBLIC","supersedes":null,"keywords":["slewing ring","bolt preload","load-sensing washer","structural integrity","rotary motion","bolt loosening","condition monitoring","fastener","torque retention"],"extent":{"words":2316,"paragraphs":18,"figures":3},"hashes":{"canonical_text_sha256":"3e0ca4b19733a636f6a5afa859514258f0c0328ec622a0b8b54e9265cd540a18","html_sha256":"5afb15481cf8ba7f196a9978d965f639110527807cf4b803e55ef078c0ad938c","pdf_sha256":"147ccf3b24e4f67dfca4b1e4db53cbeae2d485cbc1bbf8ac31b5463c81af73b8","markdown_sha256":"e75fe42487ee625adbdcd185c35f686bb53cf7518e2e6ffa006efbcb4aca37b5","manifest_sha256":"62b94b0cdae41a371a2cb7ed1e41338b93e98be1b5630c52b45577d787168b84"},"links":{"html":"https://opentechnical.org/p/OT-2026-000000044","text":"https://opentechnical.org/p/OT-2026-000000044/publication.txt","markdown":"https://opentechnical.org/p/OT-2026-000000044/publication.md","pdf":"https://opentechnical.org/p/OT-2026-000000044/publication.pdf","manifest":"https://opentechnical.org/p/OT-2026-000000044/manifest.json","signature":"https://opentechnical.org/p/OT-2026-000000044/manifest.sig","integrity":"https://opentechnical.org/p/OT-2026-000000044/integrity"},"categories":[{"category_id":"CAT-000000217","path":"industrial-motion-power-transmission/rotary-motion/slewing-rings","name":"Slewing Rings","primary":true},{"category_id":"CAT-000000206","path":"industrial-motion-power-transmission","name":"Industrial Motion & Power Transmission","primary":false},{"category_id":"CAT-000000213","path":"industrial-motion-power-transmission/rotary-motion","name":"Rotary Motion","primary":false},{"category_id":"CAT-000000252","path":"sensors-controls-machine-vision/force-and-pressure-sensing/load-cells","name":"Load Cells","primary":false}]}