1 Insert Systems Wire Inserts Wire Inserts . Heli-Coil precision formed wire Inserts are readily recognized and highly regarded products in the industry. Since its inception in 1938, Heli-Coil has been identified as an industry leader offering products with superior performance, reliability and integrity. Our strict quality programs ensure that we meet the latest industry standards of QS. and ISO, as is evident in our track record of consistently passing audits without technical findings. Our SPC and detailed inspection programs elevate our quality levels well above our competitors. Heli-Coil wire Inserts are manufactured with over 60 years of experience. We are dedicated to exceeding our customer's expectations by providing innovative value- added design and engineering services, on-time deliveries and excellent customer service support. Heli-Coil is committed to developing superior products manufac- tured to only the highest quality standards.
2 We are more than just a supplier, we are a business partner. Heli-Coil is a registered trademark of Emhart Teknologies, Inc. Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116 CERTIFIED 3. ISO 9001 OS 9000. Mexico Tel 52-5-326-7100 Fax 52-5-326-7141 ISO 14001. 4,5,6. 7. 8. 9. 10. 11-13. 13. 32. 33. CONTACT DETAILS .. PAGE 34. Heli-Coil screw thread Inserts Types of Inserts Heli-Coil Inserts are preci- There are two designs of sion formed screw thread coils Heli-Coil Inserts worked into a diamond shape. STANDARD, which provides The resultant surface finish is a smooth free-running a mirror-like 8-16 micro inches. thread; and, SCREW-LOCK This wire is then wound into a which provides self-locking spiral coil which when installed torque on the male member into Heli-Coil tapped holes, pro- vides permanent conventional by a series of chords on 60 internal screw threads.
3 One or more of the Insert This assembled Insert accom- coils. They are available in modates any standard bolt or inch series coarse and fine screw (MIL-S-7742) and MIL-S- and metric series, coarse 8879 (UNJ controlled radius and fine. Inch series Screw- root) male threaded members. Lock Inserts are dyed red for (See page 8 for material avail- identification. ability.). Heli-Coil Inserts are larger in diameter before installation than the tapped hole. During installation the inserting tool applies torque to the tang re- ducing the diameter of the leading coil permitting it to en- ter the tapped thread. After in- stallation each high tensile stainless steel coil of the Insert expands outward with a spring- like action permanently an- choring the Insert . Standard Heli-Coil Insert Illustration of the Retention Principle Size Range: UNC #2 through 1-1/2. UNF #2 through 1-1/2.
4 Metric Coarse M2 through M39. Metric Fine M8 through M39. Inserts are also available in UNEF, UNS, 8UN, 12UN, 16UN, Spark Plug and Pipe Thread. Screw-Lock Heli-Coil Insert 4 Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116 CERTIFIED X. 5. ISO 9001 OS 9000. Mexico Tel 52-5-326-7100 Fax 52-5-326-7141 ISO 14001. Heli-Coil screw thread Inserts FEATURES &. BENEFITS . Heli-Coil Inserts provide locking, swaging or keying in High Production a positive means for protecting place the outward spring-like Heli-Coil Inserts are available and strengthening tapped threads action of the Insert holds it in mounted on plastic strips and in any material. The unique place. wound onto reels (500 or 1000. design features of the Insert offer Inserts per reel). With power Minimize Space & Weight installation tooling, use of strip many benefits . Heli-Coil Inserts allow use of feed Inserts will substantially Stronger Assemblies.
5 Smaller bosses, flanges and increase installation rates by Tapped threads are strength- fasteners than any other Insert . minimizing handling. ened because the inherent Heli-Coil Inserts can generally flexibility of the Insert provides be incorporated in existing a more balanced distribution of designs, where no provision Universal Acceptance dynamic and static loads has been made for an Insert , Heli-Coil Standard and Screw- throughout the length of thread without increasing boss size. lock Inserts are the original and engagement. This flexibility also have an extensive background of Minimize Total Cost. tension, torque, shear, vibration compensates for variation in Cost savings abound. Lower and fatigue tests conducted by lead and angle error allowing Insert cost, lower installation American industry's leading each coil to carry its share of the cost, and Heli-Coil Inserts companies as well as the load.
6 Provide design flexibility by Military. Successful applications No Thread Wear. allowing a wide choice of in the fields of aviation, electron- Thread life is dramatically parent materials while main- ics, industrial, automotive and increased even after repeated taining maximum threaded military equipment provide a assembly and disassembly, assembly strength. wealth of experience and confi- because the Insert hardness dence in the performance and True Clamping Torque. and surface finish practically reliability of Heli-Coil Inserts . Maximum clamping action and eliminate erosion of the bolt tension are assured with thread form due to friction. minimum wrench torque, be- Total Design Service Corrosion Resistance. cause of the mirror-smooth In addition to the benefits listed Under normal environmental surface finish of Heli-Coil above, Heli-Coil provides a wide conditions, Heli-Coil Inserts Inserts .
7 Range of support to solve fasten- minimize galvanic action ing problems. This manual is one Wide Temperature Range. within the threaded assembly of them the following pages are Heli-Coil stainless steel Inserts because of their superior cor- presented in a manner to make it can be used in temperatures rosion resistance. easy to design-in Heli-Coil ranging from 320 F to Inserts to take advantage of the Design Flexibility. +800 F. extraordinary benefits they Bolt tensile strength can be provide. Quality & Reliability. balanced against parent mate- Stringent Quality Assurance rial shear strength, assuring Additionally, our Sales Engineers, and Engineering Standards are bolt failure rather than parent Applications Engineers and rigidly enforced in all phases of material damage. Five Insert Design Engineers are available for the manufacturing process. lengths are available in each consultation of specific designs.
8 This assures integrity of your thread size. When the product gets to the product design. manufacturing phase, our exten- Eliminate Stress. sive experience in production Virtually no stress is intro- tooling and installation tech- duced into the parent material niques ensures that you can because there is no staking, indeed make your product better with Heli-Coil Inserts . X. 6 5 CERTIFIED Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116. ISO 9001 OS 9000. ISO 14001 Mexico Tel 52-5-326-7100 Fax 52-5-326-7141. Heli-Coil screw locking thread Inserts LOCKING FEATURES & BENEFITS . Heli-Coil offers three types of locking Inserts for multiple appli- cations . Screw-Lock Inserts : Positive self-locking torque, complying with NASM 8846, MA1565 and MIL-N-25027. A resilient locking mechanism (applies to Heli-Coil screw-lock Inserts ) that grips the bolt and Locks Adjustment Inaccessible or Lock Set Screws.
9 Prevents it from loosening Screws. This simple Miniaturized Positively locks under vibration or impact. design allows Assemblies. Heli-Coil assembly against permanent, positive Screw-Lock Insert loosening at desired Repeated assembly and disas- adjustment of screws permits the installa- adjustment . sembly without appreciable in any position, tion of the lock from protects threads loss of self-locking torque. secure against the front or top. No against stripping vibration or impact. blind fumbling for under high torque . Savings in space, weight and assembly of lock permits use of light money, through the elimina- washers or lock nuts housing materials. tion of lock wiring, lock nuts, behind or under- neath. lock washers, chemical com- pounds, plastic pellets/patches The locking action is achieved by one or more of the Insert and other locking mechanisms. coils having a series of straight segments or chords.
10 When the bolt enters the grip coil, these chordal segments flex outward, creating pressure on the bolt. The pressure is exerted Hi-Torque Inserts : between the flanks of the bolt thread to establish an extensive Similar to Screw-Lock except positive and consistent self-locking torque over more cycles higher prevailing torque com- than any other prevailing torque mechanism. pensates for reduced friction in highly lubricated applications. Ideal for higher vibration Military Standards applications. Heli-Coil Inserts and tooling MA1567. Insert , Screw Approximate 40% increase in comply with the following Stan- Thread, Helical Coil (Metric prevailing torque levels. dards and Specifications: Series), Standard Dimensions, Available in #10 through 3/8" Assembly NASM 122076 thru UNF only NASM 122275. Insert , corro- MA3279, 3280, 3281. Insert , Meets AS3094, 3095, 3096, sion resistant Helical Coil Screw Thread, Helical Coil 3097 Coarse Thread (Inch Series) (Metric Series), Screw-Locking NASM 124651 thru A-A-59158.