12 best round threading dies

Round threading dies are cutting tools used in various industrial applications for creating external threads on cylindrical workpieces.These dies are essential tools for machining and manufacturing processes. Here's what you need to know about round threading dies:

Purpose: Round threading dies are designed to cut threads on the outer surface of cylindrical objects, such as bolts, screws, rods, and pipes. They help create precise, uniform threads that allow threaded components to fit and function together correctly.
Materials: These threading dies are typically made from high-speed steel (HSS) or carbon steel. The choice of material depends on the specific application, with HSS being preferred for more demanding tasks due to its durability.
Thread Types: Round threading dies can be used to create various thread types, including metric threads, Unified National Thread (UN or UNEF), and pipe threads (NPT). The choice of die depends on the required thread type and size.
Die Size: Threading dies come in various sizes to accommodate different workpiece diameters and thread pitches. The size is usually specified by the die's diameter and pitch (e.g., 1/4"-20 for a quarter-inch diameter bolt with 20 threads per inch).
Die Shape: Round threading dies are cylindrical in shape and have external cutting threads. They are available in a variety of sizes and shapes to match the desired thread specifications.
Die Sets: Many threading operations use a die and tap set, where the round threading die creates external threads, and the tap creates internal threads that match the external threads. This ensures proper fit and functionality when assembling threaded components.
Die Holders: To facilitate the threading process, round threading dies are often used with die holders or handles. These tools provide a firm grip on the die and allow for precise application of force during the threading operation.
Usage: When using a round threading die, the workpiece is secured, and the die is rotated onto the surface, cutting into the material to create the threads. Lubrication is often used to reduce friction and extend the life of the die.
Maintenance: Regular maintenance, such as cleaning and sharpening, is essential to keep round threading dies in good working condition. Dull or damaged dies can produce low-quality threads and may need replacement.
Safety: Safety precautions, including wearing appropriate personal protective equipment and ensuring the workpiece is securely fixed during threading, should be observed to prevent accidents.

In summary, round threading dies are cutting tools used to create external threads on cylindrical workpieces. They are available in various sizes and materials and are essential for manufacturing and machining processes that require precision threads on components such as bolts, screws, rods, and pipes. Proper selection and maintenance of threading dies are critical to achieving high-quality threads and ensuring the integrity of threaded connections.

Below you can find our editor's choice of the best round threading dies on the market

Round threading dies are cutting tools used in the process of threading, which is the creation of a helical groove on a cylindrical surface. Threading dies are commonly employed in metalworking and machining operations to produce threads on screws, bolts, and other threaded components. The dies are used to cut the external threads on cylindrical workpieces, and they come in various shapes and sizes to accommodate different thread specifications.

Key features and aspects related to round threading dies include:

Material:
- Threading dies are often made of high-speed steel (HSS) or tungsten carbide to withstand the rigors of cutting through metal.
Construction:
- Round threading dies are typically circular in shape, with cutting edges on the outer circumference.
- They are commonly used in die stocks or threading machines, where the die is applied to the workpiece with rotational motion to create the threads.
Types of Threads:
- Round threading dies can be designed for different thread types, such as metric or inch threads, and they may have specific pitches to match the requirements of the threaded component.
Usage:
- Threading dies are employed in a variety of industries, including automotive, aerospace, and general manufacturing, where threaded components are essential.
Die Sizes:
- Round threading dies come in various sizes to accommodate different diameters of workpieces. It is crucial to use the appropriate die size for the specific threading task.
Die Adjustment:
- Some threading dies allow for adjustment to accommodate variations in material hardness or to compensate for wear over time.
Maintenance:
- Proper maintenance, such as regular cleaning and sharpening, is essential to ensure the longevity and efficiency of round threading dies.
Safety Considerations:
- Users should follow safety guidelines when using threading dies, as these tools involve cutting and can pose risks if not handled properly.

In summary, round threading dies play a crucial role in the manufacturing process by enabling the creation of precise threads on cylindrical workpieces. The choice of the appropriate threading die depends on factors such as the type of thread, material of the workpiece, and the required thread specifications.

Below you can find our editor's choice of the best round threading dies on the market

Groz Professional Die Stock Holder | Suitable for 1-1/2 inch Round Dies | All Steel Construction (09113)

Groz

Based on 18 reviews Check latest price

Product description

GROZ 09113 Professional Die Stock Holder. Suitable for 1-1/2 inch round dies. All Steel construction. Black powder coated body. Handle has knurled ends

All steel construction
Handle has knurled ends with black powder coated finish
Suitable for round die size: 1-1/2 inch
12-3/8 inch Length

Product features

Groz 9113 Die Stock Holder 1-1/2"

Die holders are used for holding round dies, that are suited for efficient and clean cutting of external threads.

Die holders have a rugged construction with heavy duty set screws that hold the die firmly in place.

Manufactured in Two Types:

Type A - Acc DIN 225

These have steel bodies with chrome plated handles.

Type B - Professional

All steel construction with black powder coated body. Handles have knurled ends with ends in black powder coated finish.

uxcell 5/8"-24 UNEF Round Die, Machine Thread Right Hand Threading Die, Alloy Tool Steel

Based on 23 reviews Check latest price

Round Die: Thread size: 5/8"-24 UNEF; outside diameter (OD): 38mm / 1.5"; Thickness: 10mm / 0.4"; accuracy class: 6g. Made of alloy tool steel, hardness and wear-resistance.
Application: Round dies are suitable for general purpose threading. Can process, correct or clean the external threads. Great for maintenance and repair work.
Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic.
Easy To Use: The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened.
Tips: It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping the thread.

User questions & answers

Question:	Is this right hand or left hand thread
Answer:	Between 1 and 2 inches

Product features

Products Information

Dies for processing external threads consist of a cutting part, a positioning part and a chip hole.
Dies can be divided into round dies, square dies, hex dies according to the shape. They are also called as ordinary thread dies, pipe thread dies and tapered pipe thread dies according to the purpose.
Use chip fluid (oil) to obtain quality threads, and it is also suitable for thread maintenance. Suitable lubricating oil is conducive to cutting or cooling, making cutting more brisk, improving smoothness and dimensional accuracy.

Lubricating oil

Lubricant should be applied to the cutting edge. It can help to extend the service life of tools in tapping operations.
Recommended Lubricants: Steel---cutting oil and engine oil, cast iron---dry oil, aluminum---kerosene, stainless steel---a little kerosene mixed with lard oil, bakelite hard rubber----drying oil.

Notice

Check the specification and outer diameter of the die and the clamping range of the die wrench to ensure that the two match. Choose a suitable screwdriver to unscrew the fixing screws on the main body of the die wrench.
Put the die into the clamping body of the die wrench, and turn the die slightly to make the side hole of the die consistent with the position of the wrench fixing screw.
Tighten the screws with a suitable screwdriver, so that the die and the wrench can be closely combined. When operating the tapping tool into a semicircle, it must be retracted to ensure that the chips are discharged in time.

uxcell 7/16"-20 UNF Round Die, Machine Thread Right Hand Threading Die, Alloy Tool Steel, 2pcs

Based on 2 reviews Check latest price

Round Die: Thread size: 7/16"-20 UNF; outside diameter (OD): 30mm / 1.2"; Thickness: 11mm / 0.43"; accuracy class: 6g. Made of alloy tool steel, hardness and wear-resistance.
Application: Round dies are suitable for general purpose threading. Can process, correct or clean the external threads. Great for maintenance and repair work.
Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic.
Easy To Use: The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened.
Tips: It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping the thread.

Product features

Products Information

Dies for processing external threads consist of a cutting part, a positioning part and a chip hole.
Dies can be divided into round dies, square dies, hex dies according to the shape. They are also called as ordinary thread dies, pipe thread dies and tapered pipe thread dies according to the purpose.
Use chip fluid (oil) to obtain quality threads, and it is also suitable for thread maintenance. Suitable lubricating oil is conducive to cutting or cooling, making cutting more brisk, improving smoothness and dimensional accuracy.

Lubricating oil

Lubricant should be applied to the cutting edge. It can help to extend the service life of tools in tapping operations.
Recommended Lubricants: Steel---cutting oil and engine oil, cast iron---dry oil, aluminum---kerosene, stainless steel---a little kerosene mixed with lard oil, bakelite hard rubber----drying oil.

Notice

Check the specification and outer diameter of the die and the clamping range of the die wrench to ensure that the two match. Choose a suitable screwdriver to unscrew the fixing screws on the main body of the die wrench.
Put the die into the clamping body of the die wrench, and turn the die slightly to make the side hole of the die consistent with the position of the wrench fixing screw.
Tighten the screws with a suitable screwdriver, so that the die and the wrench can be closely combined. When operating the tapping tool into a semicircle, it must be retracted to ensure that the chips are discharged in time.

38mm 1.5" Heavy Duty Die Handle Round Die Stock Handle Wrench Holder 1 1/2 OD Non Slip（New Style）

MOTOKU

Based on 107 reviews Check latest price

Product description

Name: Die Handle

Model: 38mm 1.5"

Material: steel

Heavy duty 5-screw design

Ideal for gunsmithing and industrial use.

Heavy duty construction, good surface finish

Anti-Slip and Anti-Fatigue Handle Grips

Compatible with: 1.5" or 38mm round die

High Quality and Fast Ships from USA
This is an Aftermarket Part.
Package Included: 1.5" or 38mm round die

User questions & answers

Question:	Is this really stainless steel
Answer:	No, this die stock is made specifically for round dies. To hold your die properly you need a die stock that is made for a hex die that is 1 1/2 inches across the flats. In fact, the hex die would have a dimension of about 1.73 inches from corner to opposite corner so it wouldn't even fit in this die stock.
Question:	Is this also appropriate for a hex die that is 1 1/2 inches across the flats
Answer:	the total length for this part is 315mm
Question:	How long is it handle tip to handle tip
Answer:	I haven't measured it since my calipers won't read in 10ths of one thousandth of an inch but I can tell you that it is a close enough fit on a 1.500" die that if the handle is substantially colder than the die (contraction differential ) it will not fit, the tolerances are that close. Ask me how I know. : )
Question:	What is the actual max inside diameter that this tool accommodates? I have 1 5/8" die that I need handle for
Answer:	If your mini lathe can use a boring bar with a shank diameter of 13mm and then you can buy it!

Drill America 1/4"-20 1"OD High Speed Steel Round Adjustable Die, DWT Series

Drill America

Based on 10 reviews Check latest price

Product description

Drill America DWT Series Qualtech High-Speed Steel round adjustable die is desired for improved wear life. Round Dies are chamfered on both faces. One side has a 2 to 3 thread chamfer for threading, the other side has a 1 to 1-1/2 thread chamfer for threading close to a shoulder. Adjustment is obtained by a fine pitch screw which forces the sides of the die apart, or allows them to spring together. The slot is beveled so that when the die is use in a machine holder the adjusting screw can be removed and adjustment made by the adjusting screws in the holder.

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
Right-hand cut tools have a cutting action that engages when they are run in a clockwise direction
Round die is chamfered on both faces
Adjustment is obtained by a fine pitch screw which forces the sides of the die apart, or allows them to spring together
The slot is beveled

Product features

Versatile and Tough

Drill America High Speed Steel Round Adjustable Dies are perfect for use in making new threads or re-threading existing threads. These high-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.

Wide Range of Sizes

Drill America High Speed Steel Round Adjustable Dies are available in fractional (#0-80 - 2-1/2") and metric (m1 - m52) sizes, standard (right) and reverse (left) threads with OD's ranging 5/8" - 5".

uxcell 1/2"-13 UNC Round Die, Machine Thread Right Hand Threading Die, Alloy Tool Steel

Based on 16 reviews Check latest price

Round Die: Thread size: 1/2"-13 UNC; outside diameter (OD): 38mm / 1.5"; Thickness: 14mm / 0.55"; accuracy class: 6g. Made of alloy tool steel, hardness and wear-resistance.
Application: Round dies are suitable for general purpose threading. Can process, correct or clean the external threads. Great for maintenance and repair work.
Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic.
Easy To Use: The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened.
Tips: It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping the thread.

Product features

Products Information

Dies for processing external threads consist of a cutting part, a positioning part and a chip hole.
Dies can be divided into round dies, square dies, hex dies according to the shape. They are also called as ordinary thread dies, pipe thread dies and tapered pipe thread dies according to the purpose.
Use chip fluid (oil) to obtain quality threads, and it is also suitable for thread maintenance. Suitable lubricating oil is conducive to cutting or cooling, making cutting more brisk, improving smoothness and dimensional accuracy.

Lubricating oil

Lubricant should be applied to the cutting edge. It can help to extend the service life of tools in tapping operations.
Recommended Lubricants: Steel---cutting oil and engine oil, cast iron---dry oil, aluminum---kerosene, stainless steel---a little kerosene mixed with lard oil, bakelite hard rubber----drying oil.

Notice

Check the specification and outer diameter of the die and the clamping range of the die wrench to ensure that the two match. Choose a suitable screwdriver to unscrew the fixing screws on the main body of the die wrench.
Put the die into the clamping body of the die wrench, and turn the die slightly to make the side hole of the die consistent with the position of the wrench fixing screw.
Tighten the screws with a suitable screwdriver, so that the die and the wrench can be closely combined. When operating the tapping tool into a semicircle, it must be retracted to ensure that the chips are discharged in time.

1/2" - 28 UNEF Right Hand Tap and Die Set with Round Die 22LR 223 5.56 9mm

Based on 215 reviews Check latest price

Product description

Package includes 1x 1/2x28 TAP & 1x 1/2x28 DIE.

Fits for 9mm, 223, 5.56, 22lr and more others.
Perfect for making or repairing male and female threads on muzzle or muzzle devices.
Package includes 1x 1/2x28 TAP & 1x 1/2x28 DIE.
Full grinding thread, sharp and durable, tap automatic fine grinding process, clear thread, sharp blade, to meet the processing requirements.
High quality with Competitive price, Good Customer Service

uxcell 1/2"-28 UNEF Round Die, Machine Thread Right Hand Threading Die, Alloy Tool Steel

Based on 25 reviews Check latest price

Round Die: Thread size: 1/2"-28 UNEF; outside diameter (OD): 38mm / 1.5"; Thickness: 10mm / 0.4"; accuracy class: 6g. Made of alloy tool steel, hardness and wear-resistance.
Application: Round dies are suitable for general purpose threading. Can process, correct or clean the external threads. Great for maintenance and repair work.
Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic.
Easy To Use: The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened.
Tips: It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping the thread.

Product features

Products Information

Dies for processing external threads consist of a cutting part, a positioning part and a chip hole.
Dies can be divided into round dies, square dies, hex dies according to the shape. They are also called as ordinary thread dies, pipe thread dies and tapered pipe thread dies according to the purpose.
Use chip fluid (oil) to obtain quality threads, and it is also suitable for thread maintenance. Suitable lubricating oil is conducive to cutting or cooling, making cutting more brisk, improving smoothness and dimensional accuracy.

Lubricating oil

Lubricant should be applied to the cutting edge. It can help to extend the service life of tools in tapping operations.
Recommended Lubricants: Steel---cutting oil and engine oil, cast iron---dry oil, aluminum---kerosene, stainless steel---a little kerosene mixed with lard oil, bakelite hard rubber----drying oil.

Notice

Check the specification and outer diameter of the die and the clamping range of the die wrench to ensure that the two match. Choose a suitable screwdriver to unscrew the fixing screws on the main body of the die wrench.
Put the die into the clamping body of the die wrench, and turn the die slightly to make the side hole of the die consistent with the position of the wrench fixing screw.
Tighten the screws with a suitable screwdriver, so that the die and the wrench can be closely combined. When operating the tapping tool into a semicircle, it must be retracted to ensure that the chips are discharged in time.

TOUHIA M22x1.5 Metric Right Hand Thread Die(1Pc)

Based on 36 reviews Check latest price

Product description

Features:

High hardness and durable, suitable for mold machining.

Ideal for automotive repair and machinery where metric threads are specified.

The round shape is designed for use in die stock and adjustable wrenches.

Their powerful construction helps ensure that bolts fit tightly and anchor securely.

Die can be installed in DIE wrench using manual processing threads can also be mounted on the die holder on the machine to use.

Specifications:

Material: alloy tool steel

Size: M22 x 1.5

Package Included: 1 x M22 Metric Thread Die

After-sale service: Feel free to contact us with any product issues.

Metric Alloy Steel material Die
Ideal for repair or maintenance work
Use with any type of wrench
Available in many sizes
With right hand thread

User questions & answers

Question:	Does this come with the holder/handle
Answer:	If the door is solid wood, I"d say you'd be fine. If it's hollow, don't even try. You will need to buy slightly shorter wood screws.

Utoolmart M5 X 0.8 Metric Round Die Machine Thread Die, Machine Thread Hand Threading Die, High Speed Steel 1 pcs

Check latest price

Product description

Products Information

Dies for processing external threads consist of a cutting part,a positioning part and a chip hole.

Dies can be divided into round dies, square dies, hex dies according to the shape.They are also called as ordinary thread dies,pipe thread dies and tapered pipe thread dies according to the purpose.

Use chip fluid (oil) to obtain quality threads,and it is also suitable for thread maintenance.Suitable lubricating oil is conducive to cutting or cooling,making cutting more brisk, improving smoothness and dimensional accuracy.

Applications

Round threading dies are suitable for general purpose threading.Can process,correct or clean the external threads.Ideal for maintenance and repair work.

Lubricating oil

Lubricant should be applied to the cutting edge.It can help to extend the service life of tools in tapping operations.

Recommended Lubricants:Steel---cutting oil and engine oil,cast iron---dry oil,aluminum---kerosene,stainless steel---a little kerosene mixed with lard oil,bakelite hard rubber----drying oil.

Notice

Check the specification and outer diameter of the die and the clamping range of the die wrench to ensure that the two match. Choose a suitable screwdriver to unscrew the fixing screws on the main body of the die wrench.

Put the die into the clamping body of the die wrench,and turn the die slightly to make the side hole of the die consistent with the position of the wrench fixing screw.

Tighten the screws with a suitable screwdriver, so that the die and the wrench can be closely combined.When operating the tapping tool into a semicircle,it must be retracted to ensure that the chips are discharged in time.

Specifications:

Thread Size: M5 X 0.8

Outside Diameter:20mm / 0.8"

Surface Treatment: Ground Finish

Material:High Speed Steel

Package:

1pcs x Round Die

【Round Die】- Thread size: M5 X 0.8; outside diameter (OD): 20mm / 0.8"; fine grinding. Made of high speed steel, hardness and wear-resistance for long service life.
【Application】- Round dies are suitable for general purpose threading. Can process, correct or clean the external threads. Great for maintenance and repair work.
【Features】- Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic.
【Easy To Use】- The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened.
【Tips】- It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping the thread.

uxcell 4-40 UNC Tap and Die Set, HSS Machine Thread Tap with Round Threading Die, Right Hand

Check latest price

Product description

Tap Size:

Thread Size: 4-40 UNC; Thread Length: 17mm / 0.67"; Overall Length: 52mm / 2.05"; Square Shank Size: 2.5mm / 0.1"; Tolerance Grade: 2B; Material: High Speed Steel (HSS); Type: Machine Tap

Die Size:

Thread Size: 4-40 UNC; Outside Diameter (OD) : 20mm / 0.79"; Thickness: 5mm / 0.2", Material: Alloy Tool Steel; Type: Round Die

Package Included:

1 x Tap and Die Set (1 x Machine Tap, 1 x Round Die)

Descriptions:

1. Compatibility: Suitable for making or repairing male and female threads. Good for general purpose applications. Tap and die are both right hand thread.

2. Application: Used for through hole processing, such as alloy steel , die steel, cast iron, ferrous and non-ferrous materials etc.. Great for maintenance and repair work.

3. Features: High speed steel (HSS) tool provides high hardness and good wear-resistance. With fine grinding process, tap and die set is sharp and durable, and with clear thread to meet the processing requirements.

4. Easy to Use: The fastening screw in the middle of the die wrench should be inserted into the slot of the die and tightened. The machine tap is suitable for drill presses, tapping machines, CNC and milling machines.

5. Tips: Used with tapping oil to get high quality threads and more durable taps. Suitable lubricating oil should be added to the cutting edge of dies and taps when tapping.

Specifications: 4-40 UNC tap and die set, right hand, 2B tolerance grade. Suitable for making or repairing male and female threads. Good for general purpose applications.
Application: Used for through hole processing, such as alloy steel, die steel, cast iron, ferrous and non-ferrous materials etc.. Great for maintenance and repair work.
Features: High speed steel (HSS) tool provides high hardness and good wear-resistance. With fine grinding process, tap and die set is sharp and durable, and with clear thread to meet the processing requirements.
Easy to Use: The fastening screw in the middle of the die wrench should be inserted into the slot of the die and tightened. The machine tap is suitable for drill presses, tapping machines, CNC and milling machines.
Tips: Used with tapping oil to get high quality threads and more durable taps. Suitable lubricating oil should be added to the cutting edge of dies and taps when tapping.