HeliCoil
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EMHART TEKNOLOGIES • 4 Shelter Rock Lane, Danbury, CT 06810 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhartamericas.com

® ® Inserts Heli-Coil Inserts have evolved since their inception in the 1930’s and now include the complete range of both tanged and tangless free running and screw lock wire insert systems. Today Heli-Coil delivers a vast array of high quality inserts and installation tools designed to meet the needs of the industry’s ever demanding designers and manufacturers. Inserts are available in a variety of materials and special coatings. With Heli-Coil threads, tapped holes are strengthened and thread life is dramatically increased. Heli-Coil Inserts are The Original. Manual Tools Heli-Coil offers...

® screw thread inserts Types of Inserts There are two styles of Heli-Coil inserts. The standard or FREE RUNNING Insert which provides a smooth free-running thread; and SCREW-LOCKING – which provides self-locking torque on the male member by a series of “chords” on one or more of the insert coils. They are both available in Tanged and Tangless; Inch and Metric series. (Note: Inch series Screw-Locking inserts are dyed red for identification.) Free Running Insert Screw-Locking Insert Heli-Coil inserts are precision formed coils of extremely hard, diamond shaped 304 stainless steel. When...

® screw thread inserts FEATURES & BENEFITS Heli-Coil inserts provide a positive means for protecting and strengthening tapped threads in any material. The unique design features of the insert offer many benefits. Stronger Assemblies Tapped threads are strengthened because the inherent flexibility of the insert provides a more balanced distribution of dynamic and static loads throughout the length of thread engagement. This flexibility also compensates for variation in lead and angle error allowing each coil to carry its share of the load. No Thread Wear Thread life is dramatically increased...

® screw locking inserts LOCKING INSERTS Heli-Coil offers three types of Locking Inserts for multiple applications. Screw-Locking Inserts • A resilient locking mechanism that grips the bolt and prevents it from loosening under vibration or impact. • Repeated assembly and disassembly without appreciable loss of positive self-locking torque. • Savings in space, weight and money, through the elimination of lock wiring, lock nuts, lock washers, chemical compounds, plastic pellets/patches and/or other locking mechanisms. • Dyed red for easy identification • Available in #2-56 through 1/4-28 •...

industry standards MCliCoM INDUSTRY STANDARDS Heli-Coil inserts and tooling comply with the following Standards and Specifications: Insert, corrosion resistant Helical Coil Coarse Thread (Inch Series) Insert, corrosion resistant Helical Coil Fine Thread (Inch Series) Insert, Screw Thread, Self Locking (Inch Series) Insert, Standard Dimensions, Assembly (Inch Series) Insert, Screw Thread, Helical Coil (Inch Series) Insert, Screw Thread, Helical Coil (Metric Series) Insert, Screw Thread, Helical Coil, Standard Dimensions, Assembly (Metric Series) Insert, Screw Thread, Helical Coil, Free...

® insert coatings & plating Coatings/Plating Benefits Primer-Free® II • RoHS compliant; contains no chromates • Eliminates need for zinc primers and messy epoxies • Provides uniform top to bottom coverage • Provides enhanced visibility in the assembly • Prevents galvanic corrosion between insert and parent material • Eliminates locking torque issues associated with primers • Eliminates clogging/fouling of installation tools • Improves installation productivity • Provides additional lubrication facilitating insert installation Material Spec: None Color: Matte black Dry Film Lubricant •...

® insert materials Heli-Coil inserts are available in a wide choice of materials to suit specific application needs. Contact Heli-Coil Applications Engineering to determine the correct material for your application. 304 Stainless Steel • Standard, general purpose material • Ideal for original equipment applications, repair, and overhaul Temperature range: up to 800°F Tensile: 200,000 – 250,000 PSI Hardness: RHc 43-50 Corrosion resistance: Moderate • Stocked in most sizes Magnetic Permeability: 2-10 G/o (depending on wire size) Nitronic 60® Material Spec: UNS S21800 • Superb gall resistance...

screw lock torque data Heli-Coil Screw-Locking inserts meet the locking torque value of Tables I and II shown below. The values shown conform (metric series) requirement. IMPORTANT NOTE: When using heat-treated steel screws or stainless steel screws with a Screw-Locking insert, an anti-seize compound MUST be applied to the screw or insert to minimize galling and maximize cycle life. Compounds include Primer Free® II coating or Dry Film Lubricant (Molybdenum Disulfide) to improve the wear life of the screws. In lieu of coatings, Heli-Coil Gall Resistant inserts are highly recommended. TABLE...

design data HcNCQil Assembly Strength Heli-Coil offers maximum design flexibility while adhering to conservative engineering practice allowing use of Heli-Coil inserts in virtually any application or material. Five lengths of inserts are available. In this design manual, the lengths are listed as multiples of the nominal thread diameter of the screw; 1, VVi, 2,2-Vi, and 3. This choice of insert length balances the bolt tensile strength against the shear strength of the parent material. This allows for the design of assemblies where the bolt will fail before the parent material. Tables III...

MCliCoil Tanged insert specifications - inch Nominal Length NIFIED FINE THREAD (UNF) •Inactive for new design per NASM. Complete Part No. Example: Free Running Insert; 1/4-20; Stainless Steel; Primer Free II; 1-1/2 dia.; On Strip 1185 Free Running, Coarse 1191 Free Running, Fine Size Material Finish Length See Chart CN - Stainless Steel PF-Primer Free® II See Chart Notes on Insert Specifications: 1. Nominal Length is a computed value and cannot be measured. It is the actual assembled length + 1/2 pitch. 2. The number of coils are counted 90- from the tang. 3. Grip Coil(s) Location for...