HELICOIL® Repair solutions for damaged threadss
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Catalog excerpts

HELICOIL® Repair solutions for damaged threadss - 1

Repair solutions for damaged threads – repaired, better than new

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HELICOIL® Repair solutions for damaged threadss - 2

Contents Page HELICOIL Thread inserts ® Load capacity Installation process Practical examples for thread repair Construction guidelines Technical data – Installation Thread repair ® HELICOIL Kits Metrical solutions Imperial solutions Special solutions for cars Tools and equipment – Metrical HELICOIL® Twinsert Kits – Metrical Technology Thanks to continuous optimisation, the HELICOIL® Plus is now much easier to install. “Plus” refers to the special start of the thread, compared to the HELICOIL® Classic. The thread insert is a wire with rhombic profile formed into an elastic spiral. It is...

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HELICOIL® Repair solutions for damaged threadss - 3

® HELICOIL Thread inserts Your advantages – an overview n High thread loading n Increased quality and value n Wear-resistant, low and constant thread friction n Strong n Corrosion and temperature resistant n Cost-effective n Tight fit Defective thread Repaired thread Strength The elastic properties of the HELICOIL® thread insert allow a uniform load and stress distribution. An optimum flank contact is achieved. Variable pitches and angles are compensated for over the entire length of the thread insert. Force transmission from bolt to nut thread is optimised. The quality of the screw joint...

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HELICOIL® Repair solutions for damaged threadss - 4

® HELICOIL holding thread Please only use the special HELICOIL® taps. For checking the holding thread, we can offer you HELICOIL® plug limit gauge. Drilling the core hole Please take note of the recommended diameters for drilling the core hole D1 HC from the table on page 7/ 8. Please note, that information about the twist drill B are only values for orientation. For counterboring (burring), the core hole outer diameter of the couterbore: DHC + 0.1 mm ® ® HELICOIL Plus and HELICOIL Classic installation without leader cartridge M 2 – M 16 and M 18 – M 24 (only normal pitch) UNC 2-56 to UNC...

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HELICOIL® Repair solutions for damaged threadss - 5

® HELICOIL Practical examples for thread repair Repairing of damaged spark plug threads ® In the automotive industry, the HELICOIL Plus thread technology is widely used to provide high strength threads. Thanks to efficient repair of damaged threads, valuable components do not have to be replaced. Thread repair for aluminium engines ® With HELICOIL Plus thread inserts, cost-intensive replacements of threads in aluminium engines, such as employed in motor sports, are no longer necessary. ® Preventive installation of HELICOIL Plus ensures minimum effort for thread repair during engine life....

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HELICOIL® Repair solutions for damaged threadss - 6

® HELICOIL Construction guidelines Determination of the nominal length Guideline values for determining the length of the HELICOIL® thread insert relative to the parent material and the property class, valid for temperatures of 20 °C. Strength of the parent material Tensile strength Rm (MPa) Screw property class 3.6 shear stress.. = 0.6 up to 0.7 The table for determination of the nominal length is valid for aluminium as well as materials with a ratio of tensile strenth shear stress.. = 0.8 up to 1.4 Alloy of iron casting have a ratio of tensile strenth The guideline values must be assessed...

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HELICOIL® Repair solutions for damaged threadss - 7

® HELICOIL Technical data – Installation ® ® HELICOIL Plus and HELICOIL Classic – Metrical ® The HELICOIL holding thread without countersink provides excellent screw entry into the thread insert. In circumstances where countersinking cannot be dispensed, e.g. for sealing surfaces that cannot be further machined the following special rules apply: Largest countersink Ø ≤ Holding thread outside diameter Ø DHC min respectively DHC + 0.1 mm. = Nominal thread diameter Note: Thread insert is to be at least 1 ⁄4 thread below the workpiece top surface and seated in fully cut threads (see figure...

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HELICOIL® Repair solutions for damaged threadss - 8

® HELICOIL Technical data – Installation ® ® HELICOIL Plus and HELICOIL Classic – Imperial Outer Ø of thread insert before inst. d1 min. max. Core hole diameter D1 HC min. max. Core hole depth t1 min. 1.5d 2d 2.5d Fully cut thread useable thread depth nominal length of insert L min. 1d 1.5d 2d 2.5d Length of installed insert useable thread length l2 1d 1.5d 2d 2.5d Screw-in length for screw if driving tang is not removed t3 max. 1d 1.5d 2d 2.5d BSP = British Standard pipe thread · G = ISO 228/1 pipe thread G 1/8" G 1/4" G 3/8" G 1/2" G 5/8" G 3/4" G 7/8" G 1"

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HELICOIL® Repair solutions for damaged threadss - 9

® HELICOIL Kits – Metrical solutions M 2 – M 16 x 1.5 ISO metric threads, stainless steel A2 Standard solutions Contents: n HELICOIL® Plus thread inserts in three lengths n Twist drill (up to M 12, HSS) n Hand tap (HSS) n Installation mandrel n Tang break-off tool (up to M 12) Thread size Thread size Refill pack Refill pack

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HELICOIL® Repair solutions for damaged threadss - 10

® HELICOIL Kits – Metrical solutions Standard solutions Thread size Thread size Refill pack Refill pack d = Nominal thread diameter (mm), P = Thread pitch (mm), L = Length (mm) M 18 – M 36 x 1.5 ISO metric threads, stainless steel A2 Contents: ® n HELICOIL Plus thread inserts n Hand tap (two-parts set consisting of pre and final cutter, HSS) n Installation mandrel (M 18 – M 24 normal pitch) ® n HELICOIL hand tool (M 27 – M 33 normal pitch and M 18 x 1.5 – M 36 x 1.5 threads fine pitch) Thread size Refill pack

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HELICOIL® Repair solutions for damaged threadss - 11

Standard solutions Thread size Refill pack d = Nominal thread diameter (mm), P = Thread pitch (mm), L = Length (mm)

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HELICOIL® Repair solutions for damaged threadss - 12

® HELICOIL Kits – Metrical repair assortments Thread size Repair assortment Refill pack Refill pack M 6 and M 8 ISO metric threads, stainless steel A2 es Contents: n HELICOIL® Plus thread inserts of various sizes and lengths n Twist drills (HSS) n Hand taps (HSS) n Installation mandrels n Tang break-off tools Thread size Repair assortment Contents: n HELICOIL® Plus thread inserts of various sizes and lengths n Twist drills (HSS) n Hand taps (HSS) n Installation mandrels n Tang break-off tools M 6 – M 10 ISO metric threads, stainless steel A2 Empty compartments can be equipped with the...

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