WIXLIB

Insert Systems

Heli-CoilWire InsertsWire Insertsprecision formed wire inserts are readily recognized andhighly regarded products in the industry. Since its inception in 1938, Heli-Coil hasbeen 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 QSand ISO, as is evident in our track record of consistently passing audits withouttechnical findings. Our SPC and detailed inspection programs elevate our qualitylevels well above our competitors.Heli-Coil wire inserts are manufactured with over 60 years of experience. We arededicated to exceeding our customer’s expectations by providing innovative valueadded design and engineering services, on-time deliveries and excellent customerservice support. Heli-Coil is committed to developing superior products manufactured to only the highest quality standards. We are more than just a supplier, weare 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) 732-3116Mexico Tel 52-5-326-7100 Fax 52-5-326-7141www.emhart.comCERTIFIEDISO 9001 OS 9000ISO 140013

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Heli-Coil screw thread insertsTypes of InsertsHeli-Coil inserts are preci-There are two designs ofHeli-Coil inserts STANDARD, which providesa smooth free-runningthread; and, SCREW-LOCKwhich provides self-lockingtorque on the male memberby a series of “chords” onone or more of the insertcoils. They are available ininch series coarse and fineand metric series, coarseand fine. Inch series ScrewLock inserts are dyed red foridentification.sion formed screw thread coilsworked into a diamond shape.The resultant surface finish isa mirror-like 8-16 micro inches.This wire is then wound into aspiral coil which when installedinto Heli-Coil tapped holes, provides permanent conventional60º internal screw threads.This assembled insert accommodates any standard bolt orscrew (MIL-S-7742) and MIL-S8879 (UNJ controlled radiusroot) male threaded members.(See page 8 for material availability.)Heli-Coil inserts are larger indiameter before installationthan the tapped hole. Duringinstallation the inserting toolapplies torque to the tang reducing the diameter of theleading coil permitting it to enter the tapped thread. After installation each high tensilestainless steel coil of the insertexpands outward with a springlike action permanently anchoring the insert.Standard Heli-Coil InsertIllustration of the Retention PrincipleSize Range: UNC #2 through 1-1/2 UNF #2 through 1-1/2 Metric Coarse M2 throughM39 Metric Fine M8 through M39Inserts are also available inUNEF, UNS, 8UN, 12UN, 16UN,Spark Plug and Pipe Thread.Screw-Lock Heli-Coil Insert4Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116Mexico Tel 52-5-326-7100 Fax 52-5-326-7141www.emhart.comCERTIFIEDISO 9001 OS 9000ISO 140015X

Heli-Coil screw thread insertsFEATURES &BENEFITS Heli-Coil inserts providea positive means for protectingand strengthening tapped threadsin any material. The uniquedesign features of the insert offermany benefits Stronger Assemblies.Tapped threads are strengthened because the inherentflexibility of the insert providesa more balanced distribution ofdynamic and static loadsthroughout the length of threadengagement. This flexibility alsocompensates for variation inlead and angle error allowingeach coil to carry its share of theload. No Thread Wear.Thread life is dramaticallyincreased even after repeatedassembly and disassembly,because the insert hardnessand surface finish practicallyeliminate erosion of thethread form due to friction. Corrosion Resistance.Under normal environmentalconditions, Heli-Coil insertsminimize galvanic actionwithin the threaded assemblybecause of their superior corrosion resistance. Design Flexibility.Bolt tensile strength can bebalanced against parent material shear strength, assuringbolt failure rather than parentmaterial damage. Five insertlengths are available in eachthread size.locking, swaging or keying inplace — the outward spring-likeaction of the insert holds it inplace. Minimize Space & WeightHeli-Coil inserts allow use ofsmaller bosses, flanges andfasteners than any other insert.Heli-Coil inserts can generallybe incorporated in existingdesigns, where no provisionhas been made for an insert,without increasing boss size. Minimize Total Cost.Cost savings abound. Lowerinsert cost, lower installationcost, and Heli-Coil insertsprovide design flexibility byallowing a wide choice ofparent materials while maintaining maximum threadedassembly strength. True Clamping Torque.Maximum clamping action andbolt tension are assured withminimum wrench torque, because of the mirror-smoothsurface finish of Heli-Coilinserts. Wide Temperature Range.Heli-Coil stainless steel insertscan be used in temperaturesranging from–320ºF to 800ºF. Quality & Reliability.Stringent Quality Assuranceand Engineering Standards arerigidly enforced in all phases ofthe manufacturing process.This assures integrity of yourproduct design. Eliminate Stress.Virtually no stress is introduced into the parent materialbecause there is no staking,X65CERTIFIEDISO 9001 OS 9000ISO 14001www.emhart.comHigh ProductionHeli-Coil inserts are availablemounted on plastic strips andwound onto reels (500 or 1000inserts per reel). With powerinstallation tooling, use of stripfeed inserts will substantiallyincrease installation rates byminimizing handling.Universal AcceptanceHeli-Coil Standard and Screwlock Inserts are the original — andhave an extensive background oftension, torque, shear, vibrationand fatigue tests conducted byAmerican industry’s leadingcompanies as well as the U.S.Military. Successful applicationsin the fields of aviation, electronics, industrial, automotive andmilitary equipment provide awealth of experience and confidence in the performance andreliability of Heli-Coil inserts.Total Design ServiceIn addition to the benefits listedabove, Heli-Coil provides a widerange of support to solve fastening problems. This manual is oneof them — the following pages arepresented in a manner to make iteasy to “design-in” Heli-Coilinserts to take advantage of theextraordinary benefits theyprovide.Additionally, our Sales Engineers,Applications Engineers andDesign Engineers are available forconsultation of specific designs.When the product gets to themanufacturing phase, our extensive experience in productiontooling and installation techniques ensures that you canindeed make your product betterwith Heli-Coil inserts.Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116Mexico Tel 52-5-326-7100 Fax 52-5-326-7141

Heli-Coil screw locking thread insertsLOCKING FEATURES & BENEFITS Heli-Coil offers three types oflocking inserts for multiple applications 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-lockinserts) that grips the bolt andprevents it from looseningunder vibration or impact. Repeated assembly and disassembly without appreciableloss of self-locking torque. Savings in space, weight andmoney, through the elimination of lock wiring, lock nuts,lock washers, chemical compounds, plastic pellets/patchesand other locking mechanisms.Hi-Torque Inserts: Similar to Screw-Lock excepthigher prevailing torque compensates for reduced friction inhighly lubricated applications. Ideal for higher vibrationapplications. Approximate 40% increase inprevailing torque levels. Available in #10 through 3/8"UNF only Meets AS3094, 3095, 3096,3097Stud-Lock Inserts:6 Highest prevailing torque insertavailable. Enables use of threaded rod forspace-saving stud applications. Allows for any class fit ofthreaded rod. Eliminates inconsistenciescaused by interference-fit studs. Available for both straight andstep studs, #10 through 1/2"UNC and UNF. Meets AS3080, 3081, 3082,3083Locks AdjustmentScrews. This simpledesign allowspermanent, positiveadjustment of screwsin any position,secure againstvibration or impact.Inaccessible orMiniaturizedAssemblies. Heli-CoilScrew-Lock insertpermits the installation of the lock fromthe front or top. Noblind fumbling forassembly of lockwashers or lock nutsbehind or underneath.Lock Set Screws.Positively locksassembly againstloosening at desiredadjustment –protects threadsagainst strippingunder high torque –permits use of lighthousing materials.The locking action is achieved by one or more of the insertcoils having a series of straight segments or “chords”. Whenthe bolt enters the “grip” coil, these chordal segments flexoutward, creating pressure on the bolt. The pressure is exertedbetween the flanks of the bolt thread to establish an extensivepositive and consistent self-locking torque over more cyclesthan any other prevailing torque mechanism.Military StandardsHeli-Coil inserts and toolingcomply with the following Standards and Specifications: NASM 122076 thruNASM 122275. Insert, corrosion resistant Helical CoilCoarse Thread (Inch Series) NASM 124651 thruNASM 124850. Insert, corrosion resistant Helical Coil FineThread (Inch Series) NASM 21209. Insert ScrewThread – Self Locking (InchSeries) NASM 33537. Insert – Standard Dimensions, Assembly NASM 8846. Insert, ScrewThread, Helical Coil MA1565. Insert, Screw Thread,Helical Coil (Metric Series)Emhart Teknologies Heli-Coil Bulletin 2003 Tel. (203) 924-4737 Fax (800) 732-3116Mexico Tel 52-5-326-7100 Fax 52-5-326-7141 MA1567. Insert, ScrewThread, Helical Coil (MetricSeries), Standard Dimensions,Assembly MA3279, 3280, 3281. Insert,Screw Thread, Helical Coil(Metric Series), Screw-Locking A-A-59158. Tools for inserting and extracting Helical CoilInserts FED-STD-H28. Screw ThreadStandards for Federal/Services AS3094 thru 3097 AS3080 thru 3083Special Locking Torque InsertsNote: Heli-Coil Hi-Torque and Stud-Lockinserts are made to order only. ContactHeli-Coil Applications Engineering at(203) 830-3274 for Hi-Torque and StudLock part numbers and applicationassistance.www.emhart.comCERTIFIEDISO 9001 OS 9000ISO 140017X