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    speciality

    Aerospace Fasteners

    & Electronic Hardware

    Online Support? : +91 951 339 339 9

    Helicoil Oversize Inserts, Oversized Helicoil Taps, Twinsert Kits, Oversize Inserts Sizes, Twinsert Inserts Suppliers, Helicoil Kits and Recoil kits.

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    Oversize Inserts & Twinsert Inserts

    For correcting tapping errors and restoring screw thread insert tapped holes.

    Two types of thread repair kits are available for correcting tapping errors to STI and standard tapped holes. Oversize inserts and Twinserts allow use of the original bolt size after the repair has been made.

    Oversize inserts are primarily used to correct Heli-Coil insert assemblies that gage oversize due to tapping errors. The effective correction is achieved through a larger wire cross section.

    Twinserts offer a greater degree of correction to oversize tapping errors because of the larger diameter that results from installing one insert inside another.

    This larger diameter allows repair of stripped STI holes as well as off-center STI and standard tapped holes. Holes tapped with the incorrect diameter and/or pitch can also be repaired.

    Oversize Inserts:

    Oversize Inserts are Inserts with a larger wire cross section.

    Oversize Inserts are used to correct the tapping errors that cause STI* assemblies to gage oversize. They can also be used to correct conditions of slight taper and bell-mouth in STI tapped holes.

    Oversize Insert Kits and components come in inch sizes UNC and UNF, and Metric sizes as shown in the following tables. When Oversize Inserts are installed, the original internal thread size is re-established allowing installation of the original size bolt. The columns on the right of Tables A & C indicate the effective correction to the pitch diameter of oversize tapped holes.

    Each kit contains the quantity of 1-1/2 diameter inserts indicated in Tables A and C and a special oversize bot-toming tap. For identification, the tang and bottom coil are dyed yellow on all Oversize Inserts.

    HOW TO INSTALL

    1. Retap the oversize hole with the special bot-toming tap furnished in the kit. No redrilling is necessary. For critical applications, refer to the tapping and gaging procedure listed in the Engineering Data and Trouble Shooting section.

    2. Install the insert to the proper depth below the top surface (1/4 to 1/2 pitch for tapped holes without a countersink and 1 to 1-1/2 pitch for holes with a countersink). Use the same tool recommended for a standard Heli-Coil Insert of the same size.

    3. If the assembly is still oversize, it will be necessary to resort to a Twinsert Repair Kit as shown on pages 6 & 7. Note – a standard gage can be used to check an installed free-running Oversize Insert assembly provided the insert is fully seated.

    4. When assembly is satisfactory, remove the tang with the tang break-off tool recommended for the original insert.

    ?

    Twinsert Inserts:

    Twinsert assemblies as the name implies consist of two Heli-Coil? Inserts: an Outer Insert, always Free-Running and an Inner Insert which can be either Free-Running or Screw-Lock. Twinserts are used to correct STI* or standard tapped holes that are stripped, off-center, damaged or beyond the correction range of Oversize Inserts or standard Heli-Coil? Inserts. Twinsert Kits and components come in inch sizes UNC and UNF, and Metric sizes as shown in the following tables. When Twinserts are installed, the original internal thread size is re- established allowing installation of the original size bolt.

    KIT CONTENTS

    Each kit contains the quantity of Twinserts indicated in Tables E & G, a special Twinsert bot- toming tap, an Outer Insert installation tool and a tang break-off tool for the Outer Insert. Tang break-off tools are included in kits through 7/16" UNC and UNF and M10 Metric sizes. Use long nose pliers to break off the tang on nominal thread sizes above 7/16" and M10.

    HOW TO INSTALL

    1. Drill hole to the minor diameter specified in Table J or K using the drill size specified. Drill hole to the original depth.

    2. Tap the hole to the original depth using the special bot-toming tap furnished in the kit.

    3. Install outer insert with the tool furnished in the kit 1/4 to 1/2 pitch below the top surface.

    4. Break off the driving tang with the tang break-off tool furnished in the kit. (Sizes above 7/16" or M10 use long nose pliers, bend tang up and down to snap off at notch.)

    5. Install Inner Insert to the position where the end of the last coil is flush with the end of the Outer Insert as shown below. Use the same installation tool as used for the standard Heli-Coil? Insert of the same thread size.

    6. Break off the driving tang with the tang break-off tool used for the standard Heli-Coil? Insert of the same thread size. (Sizes above 1/2" or M12 use long nose pliers, bend tang up and down to snap off at notch). The assembled inner insert will provide a Class 2B fit. For additional information on gaging, refer to the Engineering Data and Trouble Shooting section.

    Oversize Inserts

    Oversize Taps

    Oversize Correction of holes

    Twinsert Inserts

    Twinsert Free running Insert

    Helicoil Oversize Inserts

    Oversized Helicoil Taps

    Oversized Fireplace Inserts

    Twinsert Kits

    Oversized Spark Plug Inserts

    Helicoil Twinsert Drill Sizes

    Oversize Insert Distributors

    Oversize Insert Manufacturers

    Oversize Inserts Sizes

    Twinsert Inserts Suppliers

    Helicoil Kits and Recoil kits

    Twinsert Screw Locking Insert

    Twinsert Inner Insert

    Twinsert Inserting Tool

    Twinsert Correction of Holes

    Keensert Thread Repair

    Big Sert Instructions

    Helicoil Tap Drill Chart

    Helicoil Catalog

    Big Sert Spark plug

    Helicoil Twinsert DataSheet

    Oversized Helicoil Tap Sizes

    Helicoil Tap Chart

    Helicoil twinsert Kits Catalog

    Helicoil Twinsert Kit Specification

    Helicoil Oversize Insert Specification

    Emhart Helicoil

    Helicoil Installation

    3/8 Helicoil Tap Size

    Big Sert Inserts

    Big Sert Inserts Sizes

    Wood Fireplace Inserts

    Oversized Spark Plug Thread repair Kit

    Helicoil Spark Plug inserts

    Alluminium Spark plug inserts

    Big Sert Spark Plug Thread repair

    Helicoil Spark Plug Kit instructions

    Spark Plug Helicoil Autozone

    Keensert vs Helicoil

    Thread Inserts vs Helicoil

    Key Insert Installation

    Oversize Insert Installation

    Helicoil Twinsert Kit

    Helicoil Twinsert Catalog

    Helicoil Twinsert Chart

    Oversized Helicoil Taps

    Oversized Helicoil tap Specification

    10-32 Helicoil Drill Size

    Insoles for Oversozed Shoes

    Helicoil Twinsert Drill Size Chart

    Helioil Tap Drill Chart

    Big Sert Spak Plug Chart

    Oversize Inserts Catalog

    Twinsert Inserts Catalog

    Twinsert Kits Catalog

    Twinsert Kits Chart

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