Dies

Dies - a professional tool for cutting external threads

PROFI-INSTRUMENT offers to buy dies from leading European manufacturers Völkel and Profitool. For over 10 years we have been providing locksmiths and mechanics with high-quality dies for cutting threads in Kiev with an official guarantee.

What is a die and what is it for?

A die (die) is a cutting tool for cutting external threads on rods, bolts, studs and pipes. A die for cutting threads is used to create threaded connections on cylindrical parts.

Die applications

• Threading on metal rods and bars
• Restoration of damaged external threads on bolts
• Production of studs and threaded rods
• Threading on pipes for plumbing work
• Thread repair on automotive parts
• Locksmithing and mechanical work
• Production of fasteners
• Equipment modernization

Types of dies by design

Round dies (die heads)

• The most common type of dies
• Round shape with internal cutting thread
• Installed in a die holder (die holder)
• Fixed with screws
• For manual threading

Sliding dies (die heads)

• Sliding design of two halves
• Possibility of precise diameter adjustment
• For adjusting the thread size
• For threading on worn rods
• Professional adjustment precision

Hexagonal dies

• Hexagonal external shape
• Installed in wrenches
• Compact dimensions
• For work in hard-to-reach places

Pipe dies

• Specialized for cutting on pipes
• Tapered thread for tightness
• For water and gas pipes
• Dimensions in inches (1/2", 3/4", 1")

Metric thread - the most common standard

Metric thread - the basic standard in Europe, Ukraine and most countries of the world. Denoted by the letter M and diameter in millimeters.

Popular sizes of metric dies

• M3 - M6 - small parts, instrument making, electronics
• M8 - M12 - the most popular sizes, universal use
• M14 - M20 - mechanical engineering, structural elements
• M24+ - large connections, heavy equipment

Characteristics of metric thread

• Designation: M6, M8, M10, M12, etc.
• Thread pitch standard or fine
• Thread profile angle 60°
• Diameter and pitch in millimeters

Application of dies with metric thread

• Manufacturing of bolts and studs
• Repair of damaged threads
• General mechanical engineering
• Automotive engineering and repair
• Assembly operations

Inch thread for specialized tasks

Inch thread is used in plumbing, pipelines and equipment of British and American manufacture.

Main types of inch thread

Pipe thread

• For water and gas pipes
• Designation in inches (1/4", 3/8", 1/2", 3/4", 1")
• Tapered thread for tightness
• Standards G, R, NPT

UNC/UNF (American thread)

• For American-made equipment
• UNC — coarse thread
• UNF — fine thread
• US automotive industry

BSW/BSF (British thread)

• For equipment from the UK
• BSW — coarse Whitworth thread
• BSF — fine British thread
• Old and vintage equipment

Application of dies with inch thread

• Plumbing work
• Pipe installation
• Repair of imported equipment
• American-made cars

Die brands

Völkel (Germany) — the world standard of quality since 1862

• 160+ years of experience in the production of threading tools
• The highest quality of alloyed tool steel HSS-E
• Thread accuracy class 6g according to DIN/ISO
• Special TiN or TiAlN coating
• Ideal geometry of cutting teeth
• Long service life
• Professional the choice of craftsmen worldwide
• German precision and reliability

Profitool - quality dies at an affordable price

• European manufacturing quality
• Reliability for professional use
• Wide range of sizes
• Optimal price-performance ratio
• For daily work in workshops
• Affordable alternative to premium brand

Die sets - convenience and economy

Advantages of die sets

• Wide range of sizes in one case
• Savings of 15-25% compared to separate purchases
• Convenient storage and transportation
• Always the right size at hand
• Ideal for workshops and car services

Standard sets

• Metric sets - M3-M12 or M6-M20
• Inch sets - popular sizes for plumbing
• Universal sets - metric + inch thread
• In plastic or metal case
• With die holder included

Materials and coatings dies

HSS (High Speed Steel) — high-speed steel

• Base material for dies
• Hardness 62-65 HRC
• For steel, cast iron, aluminum
• Universal application

HSS-E (HSS with cobalt)

• Increased cobalt content 5-8%
• Higher wear resistance
• For stainless steels
• For severe cutting conditions

TiN (titanium nitride) coating

• Golden color
• Hardness up to 2400 HV
• Reduced friction
• 3-5 times longer service life

TiAlN (titanium-aluminum nitride) coating

• Purple-gray color
• Hardness up to 3000 HV
• For stainless steels
• Maximum wear resistance

How to properly prepare a rod for a die?

Proper rod preparation is critical for quality threading.

Rod diameter

Rod diameter = Thread diameter - 0.1-0.2 mm

Examples for metric threads

• M6: rod 5.8-5.9 mm
• M8: rod 7.8-7.9 mm
• M10: rod 9.8-9.9 mm
• M12: rod 11.8-11.9 mm

Rod preparation

1. Turn or cut to the desired diameter
2. Chamfer the end of the rod at an angle of 45°
3. Clean the surface of rust and dirt
4. Securely secure the part in a vice

Rules for working with a die

Installation in a die holder

1. Insert the die into the die holder (die holder)
2. Orient with the marking facing outwards
3. Tighten the fixing screws evenly
4. Check the reliability of the fastening

Threading process threads

1. Lubricate the rod and die with special grease
2. Install the die strictly perpendicular to the rod axis
3. Press and start rotating clockwise
4. The first 1-2 revolutions are important for proper gripping
5. Rotate with periodic reverse motion to break the chips
6. 2-3 revolutions forward, 1 revolution back
7. Add grease regularly

Lubricants for different materials

• Steel: mineral oil, sulfofresol, special pastes
• Stainless steel: special grease for stainless steel, paste
• Aluminum: kerosene, alcohol, special greases for non-ferrous metals
• Copper and brass: oil or minimal grease
• Cast iron: no grease or minimal amount

Typical errors when working with a die

The most common errors

• Incorrect rod diameter (too large)
• No chamfer at the end rod
• Die skew at the start of cutting
• Working without lubrication
• Insufficient reverse rotation to break the chips
• Using worn dies

How to avoid problems

• Accurately measure and prepare the rod
• Be sure to remove the chamfer
• Control the perpendicularity in the first revolutions
• Use high-quality lubricant
• Periodically reverse the stroke
• Replace blunt dies in a timely manner

Restoring a damaged thread with a die

When it is possible to restore the thread

• Crushed thread threads
• Minor damage to the first threads
• Contaminated thread
• Partial wear

Restore process

1. Clean the thread from dirt and rust
2. Select a die of the exact size
3. Lubricate the thread and die
4. Carefully run the die along the entire length
5. Check the quality of the restoration

When restoration is impossible

• Completely torn thread
• Deep gouges and damage
• Heavily worn thread
• In such cases, reworking to a larger size is required

Why should you buy dies at the PROFI-INSTRUMENT store?

• Official distributor of Völkel and Profitool in Ukraine
• The lowest prices for dies in Kyiv
• Völkel is a German standard with a 160-year history
• Die sets - economy and convenience
• Metric and inch threads - the entire range
• Pipe threads - for plumbing work
• Die holders included or separately
• Official manufacturer warranty
• Rod size tables included
• Expert consultation - we will help you choose the size
• Store in Kyiv - you can inspect the quality
• Fast delivery throughout Ukraine

Dies from PROFI-INSTRUMENT are German precision for your metalworking work. Buying a Völkel or Profitool die in our store means providing yourself with a high-quality threading tool with a long service life.

A die for cutting threads on rods, bolts and pipes is a set of dies for professional workshops and car services. You can order the die individually or in a set at a favorable price.

Choose dies in the catalog by thread type and size or contact us to select the optimal set of dies for your tasks.