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HELI-COIL Prewinder Type II Insert Installation Tool - Installation Tools for Helical Inserts
HELI-COILInstallation Tools for Helical Inserts

HELI-COIL Prewinder Type II Insert Installation Tool

The HELI-COIL Prewinder Type II is an installation tool for steel helical inserts, designed for right-hand coarse threads in inch measurements. This tool (MPN 7551-3) supports the precise insertion of helical…

SKU 3G-OTH-530946

Also listed as: 75513 · 7551 3

Brand
HELI-COIL
Item
Prewinder Type II Insert Installation Tool
Category
Installation Tools for Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
7551-3
Type
Helical Inserts, Steel
Tool Type
Prewinder Type II
System of Measurement
Inch
Compatible Insert Type
Helical Inserts
Compatible Thread Type
Coarse
Compatible Thread Direction
Right Hand

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Prewinder Type II is an installation tool for steel helical inserts, designed for right-hand coarse threads in inch measurements. This tool (MPN 7551-3) supports the precise insertion of helical inserts, ensuring reliable thread repair or reinforcement in industrial applications.

Frequently Asked Questions

What is the HELI-COIL Prewinder Type II used for?

The HELI-COIL Prewinder Type II (MPN 7551-3) is an installation tool for steel helical inserts. It is used to precisely prewind and install inserts into right-hand coarse threads in inch measurements, providing reliable thread repair or reinforcement in industrial applications.

What are the specifications of the HELI-COIL Prewinder Type II?

The HELI-COIL Prewinder Type II (MPN 7551-3) is a steel helical insert installation tool. It is compatible with right-hand coarse threads, inch system of measurement, and helical inserts. The tool type is Prewinder Type II, designed for precise insertion in thread repair or reinforcement.

Where to buy the HELI-COIL Prewinder Type II worldwide?

3G Electric supplies the HELI-COIL Prewinder Type II (MPN 7551-3) worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this installation tool for steel helical inserts to your facility, ensuring reliable thread repair or reinforcement.

How to install a helical insert with the Prewinder Type II?

To install a helical insert with the HELI-COIL Prewinder Type II, first select the correct insert size for your inch coarse thread. Place the insert onto the tool's tang, then rotate the tool to prewind the insert into the tapped hole. Once fully seated, remove the tool and break off the tang.

Used in

Common applications for HELI-COIL
Aerospace engine repair — HELI-COIL STI taps for M12x1.75 metric threads in aluminum alloy components
Automotive transmission rebuild — HELI-COIL STI taps for 7/16-14 UNC threads in cast iron housings
Industrial pump maintenance — HELI-COIL STI taps for #10-32 UNF threads in stainless steel pump bodies
Hydraulic cylinder repair — HELI-COIL STI taps for M6x1 metric threads in steel cylinder heads
General manufacturing — HELI-COIL STI taps for 9/16-18 UNF threads in machinery base plates

HELI-COIL Products

3G Electric supplies HELI-COIL installation tools for helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Screw-locking tanged helical insert for thread repair or reinforcement in metal substrates. Made from 18-8 stainless steel with dry film lubricant finish, M4-0.70 coarse thread, right-hand direction, tensile strength 200,000 to 250,000 psi. Requires STI tap size M4-0.70. Supplied in 1,000-piece pack
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Screw-locking tanged helical insert for thread repair or reinforcement in metal substrates. Made from 18-8 stainless steel with dry film lubricant finish, M4-0.70 coarse thread, right-hand direction, tensile strength 200,000 to 250,000 psi. Requires STI tap size M4-0.70. Supplied in 1,000-piece pack
Free-running tangless helical insert for thread repair and reinforcement in metal applications. Made of 18-8 stainless steel with a tensile strength of 200,000 to 250,000 psi. Features #2-56 coarse right-hand thread, plain finish, and requires STI tap size #2-56. Supplied in a 100-piece pack
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Free-running tangless helical insert for thread repair and reinforcement in metal applications. Made of 18-8 stainless steel with a tensile strength of 200,000 to 250,000 psi. Features #2-56 coarse right-hand thread, plain finish, and requires STI tap size #2-56. Supplied in a 100-piece pack
Screw-locking tanged helical insert for repairing or reinforcing threads in metal substrates. M16-2.00 thread size, 18-8 material, plain finish, tensile strength 200,000 to 250,000 psi. Requires 16.5mm drill bit and STI tap M16-2.00. Right-hand thread, metric, 100 pieces per pack
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Screw-locking tanged helical insert for repairing or reinforcing threads in metal substrates. M16-2.00 thread size, 18-8 material, plain finish, tensile strength 200,000 to 250,000 psi. Requires 16.5mm drill bit and STI tap M16-2.00. Right-hand thread, metric, 100 pieces per pack
This kit includes a tanged tang style free-running thread insert and installation tool for M10-1.00 fine threads. Made from 18-8 stainless steel with a plain finish, it is used to repair damaged internal threads in metal components, requiring a Special STI tap
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This kit includes a tanged tang style free-running thread insert and installation tool for M10-1.00 fine threads. Made from 18-8 stainless steel with a plain finish, it is used to repair damaged internal threads in metal components, requiring a Special STI tap
This tanged helical insert is made from 18-8 stainless steel with a plain finish. It has a 1 1/4"-7 coarse right-hand thread and an STI tap size of 1-1/8"-7. The screw-locking design provides resistance to vibration loosening. Tensile strength ranges from 200,000 to 250,000 psi. Used to repair or reinforce tapped threads in metal components
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This tanged helical insert is made from 18-8 stainless steel with a plain finish. It has a 1 1/4"-7 coarse right-hand thread and an STI tap size of 1-1/8"-7. The screw-locking design provides resistance to vibration loosening. Tensile strength ranges from 200,000 to 250,000 psi. Used to repair or reinforce tapped threads in metal components
Screw-locking tanged helical insert for repairing or reinforcing threaded holes in metal substrates. Features #10-32 fine right-hand threads, plain finish, and 18-8 stainless steel construction with tensile strength of 200,000 to 250,000 psi. Supplied in packs of 1,000
HELI-COIL
Screw-locking tanged helical insert for repairing or reinforcing threaded holes in metal substrates. Features #10-32 fine right-hand threads, plain finish, and 18-8 stainless steel construction with tensile strength of 200,000 to 250,000 psi. Supplied in packs of 1,000

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Steel prewinder tool for installing helical inserts into metric coarse right-hand threads. Designed to align inserts before final installation, commonly used in thread repair applications for automotive, aerospace, and industrial equipment
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