{"id":3549,"date":"2025-07-03T11:14:04","date_gmt":"2025-07-03T03:14:04","guid":{"rendered":"https:\/\/machinedwasher.com\/?post_type=product&p=3549"},"modified":"2025-07-03T11:19:31","modified_gmt":"2025-07-03T03:19:31","slug":"key-locking-inserts","status":"publish","type":"product","link":"https:\/\/machinedwasher.com\/it\/products\/key-locking-inserts\/","title":{"rendered":"Custom Key Locking Inserts Carbon Steel Stainless Steel for Repair Thread"},"content":{"rendered":"

What Are Key Locking Inserts?<\/strong><\/h4>\n

Key Locking Inserts<\/strong>\u00a0(also called\u00a0key-locking threaded inserts<\/em>\u00a0or\u00a0key-lock bushings<\/em>) are\u00a0high-strength threaded fasteners<\/strong>\u00a0designed to provide\u00a0permanent, vibration-resistant threads<\/strong>\u00a0in soft or brittle materials (e.g., aluminum, plastic, or composites). They feature\u00a0external locking keys<\/strong>\u00a0that dig into the host material when installed, preventing rotation or loosening under dynamic loads.<\/p>\n

\n

Specifications of Key Locking Inserts<\/strong><\/h3>\n

1. Material<\/strong><\/h4>\n
    \n
  • \n

    Stainless Steel<\/strong>\u00a0(304, 316 \u2013 corrosion-resistant for harsh environments).<\/p>\n<\/li>\n

  • \n

    Carbon Steel<\/strong>\u00a0(Grade 8 \u2013 high strength, often zinc-plated).<\/p>\n<\/li>\n

  • \n

    Aluminum<\/strong>\u00a0(lightweight applications).<\/p>\n<\/li>\n

  • \n

    Brass<\/strong>\u00a0(electrical\/thermal conductivity, corrosion resistance).<\/p>\n<\/li>\n<\/ul>\n

    2. Surface Treatment<\/strong><\/h4>\n
      \n
    • \n

      Zinc Plating<\/strong>\u00a0(anti-corrosion, general-purpose use).<\/p>\n<\/li>\n

    • \n

      Black Oxide<\/strong>\u00a0(wear resistance, mild corrosion protection).<\/p>\n<\/li>\n

    • \n

      Passivation<\/strong>\u00a0(for stainless steel, enhances corrosion resistance).<\/p>\n<\/li>\n

    • \n

      Nickel Plating<\/strong>\u00a0(high corrosion & chemical resistance).<\/p>\n<\/li>\n<\/ul>\n

      3. Common Specifications<\/strong><\/h4>\n
        \n
      • \n

        Thread Sizes<\/strong>: M3\u2013M24 (metric), #4\u20131″ (UNC\/UNF).<\/p>\n<\/li>\n

      • \n

        Installation Types<\/strong>:<\/p>\n

          \n
        • \n

          Press-in<\/strong>\u00a0(for plastics\/soft metals).<\/p>\n<\/li>\n

        • \n

          Threaded<\/strong>\u00a0(pre-threaded for easier installation).<\/p>\n<\/li>\n

        • \n

          Key-Lock Design<\/strong>\u00a0(external barbs\/keys for anti-rotation).<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

        • \n

          Load Capacity<\/strong>: Up to\u00a05x higher pull-out strength<\/strong>\u00a0vs. standard inserts.<\/p>\n<\/li>\n<\/ul>\n

          4. Applications<\/strong><\/h4>\n
            \n
          • \n

            Automotive & Aerospace<\/strong>\u00a0(engine mounts, vibration-prone assemblies).<\/p>\n<\/li>\n

          • \n

            Industrial Machinery<\/strong>\u00a0(motor housings, gearbox connections).<\/p>\n<\/li>\n

          • \n

            Elettronica<\/strong>\u00a0(PCB mounts in high-shock environments).<\/p>\n<\/li>\n

          • \n

            Marine & Defense<\/strong>\u00a0(saltwater-resistant fastening).<\/p>\n<\/li>\n

          • \n

            Plastic\/Composite Parts<\/strong>\u00a0(reinforcing threads in weak materials).<\/p>\n<\/li>\n<\/ul>\n

            \n

            Excellent Case: Servo Motor Mounting in Robotic Arm<\/strong><\/h3>\n

            Challenge<\/strong><\/h4>\n

            A robotics manufacturer needed a\u00a0vibration-proof, high-strength threaded solution<\/strong>\u00a0to secure\u00a0servo motors<\/strong>\u00a0in an industrial robotic arm. Traditional screws kept loosening due to\u00a0constant movement\/shock<\/strong>, causing misalignment and downtime.<\/p>\n

            Solution<\/strong><\/h4>\n
              \n
            • \n

              Key Locking Inserts (Stainless Steel, M6 size)<\/strong>\u00a0were installed into the\u00a0aluminum motor housing<\/strong>.<\/p>\n<\/li>\n

            • \n

              Installation Process<\/strong>:<\/p>\n

                \n
              1. \n

                A\u00a0precise hole<\/strong>\u00a0was drilled\/tapped in the motor mount.<\/p>\n<\/li>\n

              2. \n

                The insert was\u00a0threaded in and pressed<\/strong>, causing its\u00a0external locking keys<\/strong>\u00a0to bite into the aluminum.<\/p>\n<\/li>\n

              3. \n

                A\u00a0high-tensile bolt<\/strong>\u00a0secured the motor, with\u00a0Loctite\u00ae<\/strong>\u00a0for extra retention.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n

                Results<\/strong><\/h4>\n

                \u2714\u00a0Zero Loosening<\/strong>\u00a0\u2013 Withstood\u00a050,000+ movement cycles<\/strong>\u00a0without failure.
                \n\u2714\u00a0Higher Torque Capacity<\/strong>\u00a0\u2013 Insert threads held\u00a03x more torque<\/strong>\u00a0vs. direct aluminum threading.
                \n\u2714\u00a0Easy Maintenance<\/strong>\u00a0\u2013 Bolts could be removed\/replaced without damaging the threads.<\/p>\n

                Industry<\/strong><\/h4>\n

                Industrial Automation (6-Axis Robotic Arm)<\/strong><\/p>\n

                \n

                Why Use Key Locking Inserts for Motors?<\/strong><\/h3>\n

                \u2705\u00a0Vibration Resistance<\/strong>\u00a0\u2013 Keys prevent rotation under shock\/dynamic loads.
                \n\u2705\u00a0Thread Reinforcement<\/strong>\u00a0\u2013 Protects soft metals\/plastics from stripping.
                \n\u2705\u00a0Corrosion Resistance<\/strong>\u00a0\u2013 Stainless steel options for harsh environments.
                \n\u2705\u00a0Long-Term Reliability<\/strong>\u00a0\u2013 Outlasts standard threaded solutions.<\/p>","protected":false},"excerpt":{"rendered":"

                Custom Key Locking Inserts Carbon Steel Stainless Steel for Repair Thread<\/p>","protected":false},"featured_media":3553,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[29],"product_tag":[654,1510,1512,1509,1511,1513,647,1514,702,1143,576,582,698,655],"class_list":{"0":"post-3549","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-threaded-inserts","7":"product_tag-3-8-threaded-inserts","8":"product_tag-key-locked-inserts","9":"product_tag-key-locked-threaded-inserts","10":"product_tag-key-locking-inserts","11":"product_tag-key-locking-threaded-inserts","12":"product_tag-keysert-key-locking-inserts","13":"product_tag-m12-threaded-inserts","14":"product_tag-m2-threaded-inserts","15":"product_tag-m5-threaded-inserts","16":"product_tag-stainless-steel-threaded-inserts","17":"product_tag-threaded-insert","18":"product_tag-threaded-inserts","19":"product_tag-threaded-inserts-metal","20":"product_tag-threaded-inserts-steel","22":"first","23":"instock","24":"shipping-taxable","25":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/product\/3549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/comments?post=3549"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/media\/3553"}],"wp:attachment":[{"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/media?parent=3549"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/product_brand?post=3549"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/product_cat?post=3549"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/machinedwasher.com\/it\/wp-json\/wp\/v2\/product_tag?post=3549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}