10 Things to Consider When Buying Threading Inserts

Threaded inserts are essential components in various industries, offering reliable solutions for creating strong and durable threaded connections in a wide range of materials. Whether you are working on a DIY project or managing a complex manufacturing process, choosing the right threaded inserts is crucial to ensure the integrity of your threaded connections. In this comprehensive guide, well walk you through the essential factors to consider when selecting threaded inserts for your specific needs.

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Material Compatibility

The first and foremost consideration when choosing threaded inserts is material compatibility. The insert material should be compatible with both the host material (the material you are inserting the insert into) and the fastener material (the screw or bolt you intend to use). Common materials for threaded inserts include stainless steel, brass, aluminum, and various plastics. Ensure that the chosen insert material offers corrosion resistance, mechanical strength, and thermal compatibility with the host material.

Type of Threaded Insert

Threaded inserts come in various types, each designed for specific applications. The main types include:

1. Helical Inserts (Free-Running Inserts): Ideal for applications where ease of installation and versatility are paramount. They distribute loads evenly and can be removed and reused.

2. Screw-Locking Inserts: Designed for applications where vibrational loosening is a concern. These inserts provide a secure, permanent connection and resist vibration and shock.

3. Tangless Inserts: These inserts eliminate the need for a tang (a protruding end) that must be broken off after installation, making them convenient and reducing the risk of FOD (foreign object debris).

4. Key-Locking Inserts: Known for their high-strength, these inserts feature keys or locking rings that lock into the host material, providing exceptional torque and pull-out resistance.

Select the type of threaded insert that aligns with the specific requirements of your application, whether its ease of installation, resistance to vibration, or high-strength requirements.

Size and Thread Size

Threaded inserts come in various sizes to accommodate different thread sizes and hole diameters. Ensure that you select inserts with the appropriate size and thread size that match your fasteners. Mismatched sizes can lead to improper threading and compromise the integrity of the connection.

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Application Environment

Consider the environmental conditions in which the threaded inserts will be used. For outdoor or corrosive environments, stainless steel inserts provide excellent corrosion resistance. In high-temperature applications, choose inserts that can withstand elevated temperatures without compromising their structural integrity.

Installation Method

The method of installation can vary depending on the type of threaded insert. Some inserts require specialized tools or equipment for installation, while others can be installed using basic hand tools. Ensure that you have access to the necessary tools and equipment to install the inserts correctly.

Load and Torque Requirements

Determine the load-bearing and torque requirements of your application. Different threaded inserts have varying load-carrying capacities and torque resistance. Its essential to choose inserts that can handle the expected loads and torques without failure.

Cost Considerations

While quality and performance should be the primary considerations, its also essential to factor in the cost of the threaded inserts, especially for large-scale manufacturing or budget-sensitive projects. Compare the cost of different inserts while keeping in mind the long-term benefits they offer in terms of reliability and durability.

Installation Expertise

Consider the level of expertise available for the installation of threaded inserts. Some types of inserts may require more skill and experience to install correctly. Ensure that your team or the individuals responsible for installation are knowledgeable and trained in the proper installation techniques.

Choosing the right threaded inserts involves careful consideration of material compatibility, insert type, size, environmental conditions, installation method, load requirements, cost, and installation expertise. By taking these factors into account, you can select the threaded inserts that will ensure the integrity and durability of your threaded connections, whether youre working on a DIY project or managing a complex industrial application. Making the right choice in threaded inserts can lead to stronger and more reliable connections, reducing maintenance and replacement costs in the long run.

There are a wide variety of thread types produced in National and International Thread Type Standards. Thread types differ in shape and dimension, where each standard defines a specific thread type. In many cases, a thread type standard characterizes a specific requirement for an industrial branch or main field of application. For example, UNJ and MJ thread type standards are associated with the Aerospace industry, and NPT and BSPT standards are associated with the oil and gas industry for pipelines, pipe connectors, and fittings.

Thread turning applications are one of the most productive and common methods for producing threads in rotary workpieces.

Today's market of indexable cutting tools provides a wide variety of thread turning tools and inserts. The different geometries and clamping methods of the inserts are advantageous and must be chosen appropriately for each application.

A successful thread type turning application depends on the selection of the right threading tool. There are simple steps to selecting an indexable threading tool correctly; first, identify if the thread is external or internal for which to choose a right- or left-hand tool.

After choosing the feed direction corresponding to the thread type, the thread designation will be determined according to the part drawing and application.

Typically, the thread designation is in accordance with metric or imperial systems depending on the thread type standard. In most cases, the thread designation includes the following parameters:

• Standard classification
• Thread pitch
• Number of starts
• Nominal diameter
• Thread length
• Tolerance class

The moment we have the values of the thread diameter, thread pitch, and the number of starts, we can calculate the thread lead (Helix) angle φ. This value will be very important for the next steps of the anvil selection if a possible solution relates to lay-down inserts. For such a tool, the found lead (Helix) angle determines the choice of anvils.

Aside from setting the correct lead (helix) angle, the anvil also supports the inserts cutting edge and protects the tool in case of insert breakage.

There are two types of threading inserts: full profile and partial profile. Full profile inserts produce specific thread types, i.e., round (Rd) in accordance with DIN 405, British Standard Whitworth (BSW). Partial profile inserts require a precise pre-turning operation.

ISCARs laydown family of inserts offers a wide range of thread type standards for both internal and external applications. Laydown inserts can be divided into 3 main types:

• G-type General duty inserts with deflector for machining various engineering materials, including the production of short chips.
• M-type Press-to-size inserts with sintered-shaped chipbreaker for efficient chip control. Although these inserts are press-to-size, they ensure the same thread accuracy as the G-type insert. When threading at too small depths of cut, the chipbreaker efficiency drops and the M-type inserts are less recommended.
• B-type Peripherally ground inserts with a pressed chipbreaker. Efficient chip control with a sharp cutting edge is the ultimate combination for long chip materials and the first choice for ISO M stainless steel. When machining small parts, it is beneficial to use sharp-edged inserts with a chipbreaker to reduce cutting forces and consequently prevent vibrations.

One of the most common goals of the tool user is to improve productivity. Therefore, in addition to the three main insert types mentioned above, and the G-type subfamily, a multi-tooth insert was created. The main purpose of the multi-tooth insert is to increase productivity by reducing the cycle time. The multi-tooth insert is equipped with two or three teeth, while each tooth has a different role. Before using the multi tooth insert, its important to ensure the thread area is not next to the shoulder, or that theres a wide release groove to complete a full thread along the part. In addition to the ISO Standard laydown insert, ISCAR has a diverse group of captive pocket inserts. Captive pocket inserts are divided into internal threading and external threading types according to their application. Contrary to the ISO Standard laydown insert family, the clearance angles are already ground.

PENTACUT is one of ISCARs successful captive pocket insert families. PENTACUT threading inserts have a wide assortment of benefits:

• 5 cutting edges and a cost-effective solution!
• Equipped with a molded chipbreaker for efficient chip control.
• Strong design for better conditions and productivity.
• Sub-family of partial profile inserts specially designed for working close to the shoulder with diverted cutting edges.
• For right- and left-hand threading.
• Ability to machine between walls.

Ensuring the right carbide grade for the application is an important step. The grade selection has a direct proportion with the part material, machining stability, and application attributes. Grade recommendations can be found in the ISCAR catalog. Remember, picking the right grade can significantly increase the tool life of the insert.

ISCAR's wide diversity of inserts covers most of the markets demand for threading standards. With advanced solutions per specific applications, ISCAR can offer tailor-made solutions according to any customer request.

ISCARs vast experience with threading applications has brought about tremendous results in the metal working industry.

The production of thread connections is a common application in the metal working industry. Most metal working industries produce parts that are characterized by external or internal threads, from tiny dental screws to large thread joints for pipelines associated with the oil and gas industry.There are a wide variety of thread types produced in National and International Thread Type Standards. Thread types differ in shape and dimension, where each standard defines a specific thread type. In many cases, a thread type standard characterizes a specific requirement for an industrial branch or main field of application. For example, UNJ and MJ thread type standards are associated with the Aerospace industry, and NPT and BSPT standards are associated with the oil and gas industry for pipelines, pipe connectors, and fittings.Thread turning applications are one of the most productive and common methods for producing threads in rotary workpieces.Today's market of indexable cutting tools provides a wide variety of thread turning tools and inserts. The different geometries and clamping methods of the inserts are advantageous and must be chosen appropriately for each application.A successful thread type turning application depends on the selection of the right threading tool. There are simple steps to selecting an indexable threading tool correctly; first, identify if the thread is external or internal for which to choose a right- or left-hand tool.After choosing the feed direction corresponding to the thread type, the thread designation will be determined according to the part drawing and application.Typically, the thread designation is in accordance with metric or imperial systems depending on the thread type standard. In most cases, the thread designation includes the following parameters:The moment we have the values of the thread diameter, thread pitch, and the number of starts, we can calculate the thread lead (Helix) angle φ. This value will be very important for the next steps of the anvil selection if a possible solution relates to lay-down inserts. For such a tool, the found lead (Helix) angle determines the choice of anvils.Aside from setting the correct lead (helix) angle, the anvil also supports the inserts cutting edge and protects the tool in case of insert breakage.There are two types of threading inserts: full profile and partial profile. Full profile inserts produce specific thread types, i.e., round (Rd) in accordance with DIN 405, British Standard Whitworth (BSW). Partial profile inserts require a precise pre-turning operation.ISCARs laydown family of inserts offers a wide range of thread type standards for both internal and external applications. Laydown inserts can be divided into 3 main types:One of the most common goals of the tool user is to improve productivity. Therefore, in addition to the three main insert types mentioned above, and the G-type subfamily, a multi-tooth insert was created. The main purpose of the multi-tooth insert is to increase productivity by reducing the cycle time. The multi-tooth insert is equipped with two or three teeth, while each tooth has a different role. Before using the multi tooth insert, its important to ensure the thread area is not next to the shoulder, or that theres a wide release groove to complete a full thread along the part. In addition to the ISO Standard laydown insert, ISCAR has a diverse group of captive pocket inserts. Captive pocket inserts are divided into internal threading and external threading types according to their application. Contrary to the ISO Standard laydown insert family, the clearance angles are already ground.PENTACUT is one of ISCARs successful captive pocket insert families. PENTACUT threading inserts have a wide assortment of benefits:Ensuring the right carbide grade for the application is an important step. The grade selection has a direct proportion with the part material, machining stability, and application attributes. Grade recommendations can be found in the ISCAR catalog. Remember, picking the right grade can significantly increase the tool life of the insert.ISCAR's wide diversity of inserts covers most of the markets demand for threading standards. With advanced solutions per specific applications, ISCAR can offer tailor-made solutions according to any customer request.ISCARs vast experience with threading applications has brought about tremendous results in the metal working industry.

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