{"id":4977,"date":"2025-07-14T00:19:11","date_gmt":"2025-07-14T07:19:11","guid":{"rendered":"https:\/\/guxiangjs.com\/?post_type=product&p=4977"},"modified":"2025-07-14T00:19:11","modified_gmt":"2025-07-14T07:19:11","slug":"extension-spring-custom-made-universal-swivel-hook-movable-hook-tension-spring","status":"publish","type":"product","link":"https:\/\/guxiangjs.com\/zh\/shop\/extension-spring-custom-made-universal-swivel-hook-movable-hook-tension-spring\/","title":{"rendered":"Extension Spring-Custom-made Universal-Swivel-Hook (movable-hook) Tension Spring"},"content":{"rendered":"
    \n
  1. Performance
    \n\u2022 Uniform Corrosion-Safe Tension \u2013 Formed from 304 austenitic stainless wire \u00d81 \u2013 5 mm and solution-annealed, the springs deliver stable modulus and \u226560 % residual elastic energy even after 1 000 h salt-spray exposure.
    \n\u2022 High Elastic Limit \u2013 Cold-worked coils reach 1 250\u20131 600 MPa tensile strength; dual stress-relief at 300 \u00b0C holds permanent set below 2 % after 100 000 full-stroke cycles.
    \n\u2022 Swivel-Hook Versatility \u2013 Precision-milled universal hooks rotate 360 \u00b0 to self-align under load, eliminating side-bending and extending service life when anchor points are offset.
    \n\u2022 Custom Force Curve \u2013 Free lengths 30 \u2013 400 mm and coil outside diameters \u00d810 \u2013 35 mm allow preload tuning from 25 N to 1 200 N; variable-pitch options reduce initial pull force while preserving maximum extension travel.<\/li>\n
  2. Application Scenarios & Assembly Requirements
    \n\u2022 Access Panels & Machine Guards \u2013 Maintain consistent closure pressure yet permit quick removal; swivel hooks compensate for misaligned latch pins.
    \n\u2022 Automotive & Marine Components \u2013 Withstand road salt, humidity and temperature swings from \u201340 \u00b0C to +120 \u00b0C in throttle linkages, seat return mechanisms, and deck-lid assists.
    \n\u2022 Medical & Food Equipment \u2013 Non-magnetic 304 alloy meets hygiene standards for lab centrifuges, packaging jaws, and commercial dishwashers.
    \n\u2022 Fitting Guidelines
    \n\u2013 Eyelet\/Pin Diameter: 0.75 \u00d7 wire \u00d8 to minimise local stress.
    \n\u2013 Extension Limit: cap stroke at 85 % of elastic range to retain \u226595 % initial load through life.
    \n\u2013 Hook Seating: allow \u226530 \u00b0 free rotation or use clevis ends to exploit swivel capability.<\/li>\n
  3. User-Friendly Operation
    \n\u2022 Plug-and-Play Hooks \u2013 Detachable, reversible hooks install without tools; spring body can be replaced in situ while re-using existing swivels.
    \n\u2022 Kink-Free Packaging \u2013 Supplied on reusable reels or in anti-static trays with coil separators, preventing tangles and preserving preload accuracy.
    \n\u2022 Color-Band Coding \u2013 Heat-shrink markers on each spring indicate wire size and rate, streamlining line-side selection and maintenance audits.
    \n\u2022 Clean-Room Ready \u2013 Ultrasonically washed and nitrogen-packed; compatible with IPA wipe-down or autoclave cycles up to 135 \u00b0C (uncoated versions).<\/li>\n
  4. Quality & Longevity
    \n\u2022 ISO 9001 \/ IATF 16949 Production \u2013 In-line laser gauges keep coil pitch tolerance within \u00b10.05 mm and load tolerance within \u00b16 %.
    \n\u2022 Shot-Peened Fatigue Resistance \u2013 Compressive surface stresses boost cycle life by >25 % versus non-peened counterparts; laboratory tests show <3 % load fade after 1 000 000 extensions.
    \n\u2022 Custom Surface Finishes \u2013 Options include passivation (ASTM A967), black oxide, electropolish, or PTFE dry film (<8 \u00b5m) to tailor friction, reflectivity, or biocompatibility without altering spring rate.
    \n\u2022 Full Traceability \u2013 Laser-etched codes link each spring to 3.1 material certificates, furnace charts, and individual load\/deflection graphs, ensuring audit-ready documentation for aerospace, medical, and food-processing applications.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Performance \u2022 Uniform Corrosion-Safe Tension \u2013 Formed from 304 austenitic stainless wire \u00d81 \u2013 5 mm and solution-annealed, the springs deliver stable modulus and \u226560 % residual elastic energy even after 1 000 h salt-spray exposure. \u2022 High Elastic Limit \u2013 Cold-worked coils reach 1 250\u20131 600 MPa tensile strength; dual stress-relief at 300 \u00b0C […]<\/p>","protected":false},"featured_media":4978,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[534],"product_tag":[],"class_list":{"0":"post-4977","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-extension-spring","8":"first","9":"instock","10":"taxable","11":"shipping-taxable","12":"purchasable","13":"product-type-variable"},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product\/4977","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/comments?post=4977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/media\/4978"}],"wp:attachment":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/media?parent=4977"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_brand?post=4977"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_cat?post=4977"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_tag?post=4977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}