In today's competitive industry world, reducing costs and increasing productivity are the two main wings to fly towards success. One of the biggest hidden and obvious costs in machining and turning workshops is the cost of cutting tools. Continuous replacement of inserts (diamonds), drills and burs not only brings the direct cost of buying tools, but also causes stoppage of production, increases the time of setting the machine and reduces the final quality of the work piece. But is there a way to break this costly cycle? The answer is yes. By using smart techniques, you can dramatically increase the life of your turning tool, even up to two times.

In this comprehensive article, we, as specialists of "Azadmehr Store", are going to introduce you to 7 golden and proven techniques that, by implementing them, you will witness a significant increase in the life of turning tools and as a result, reduce costs and increase the profitability of your business. These techniques are the result of years of experience and technical knowledge in the field of supplying and consulting cutting tools.

Why is it so important to extend the life of turning tools?

Before we get into the techniques, let's get a deeper understanding of the importance of this topic. Increasing turning tool life doesn't just mean buying fewer inserts. Its benefits are much wider:

1. Reduction of direct costs: This is the most obvious advantage. If a tool can machine 200 pieces instead of 100 pieces, your tool cost will be halved per piece.
2. Reduction of Production Downtime: Every time a tool change means stopping the CNC machine, it needs to be reset, measured and tested. Increasing turning tool life minimizes these stops.
3. Increasing quality and stability: A sharp and healthy tool removes chips uniformly, creates a better finished surface and maintains dimensional tolerances with higher accuracy. Worn tools cause creases, low surface quality and fluctuation in dimensions.
4. Improved Overall Efficiency (OEE): By reducing stoppages and increasing the speed of sustainable production, the overall efficiency index of your equipment is directly improved.

Now that we understand the vital importance of this topic, let's move on to the main techniques.

7 golden techniques to increase the life of turning tools

These seven methods are a set of practical actions that you can implement in your workshop today.

1. Correct selection of tools and inserts: the first and most important step

Perhaps it can be said that more than 50% of the reasons for the premature failure of the tool come back to the initial incorrect selection. You can't expect great results with the wrong tool. To make the right choice, you should pay attention to four key factors:

• Workpiece Material: The first question you should ask yourself is: "What material will I machine?". A tool designed for turning stainless steel will perform disastrously on cast iron. Each material requires its own grade and coating. The experts of Azadmehr store, relying on their technical knowledge, will help you to choose the best insert for alloy steels, superalloys, aluminum, cast iron and other materials to guarantee the life of your turning tool.
• Operation Type: Are you roughing with a high amount of chipping or final finishing with high precision and smoothness? Roughing inserts have a more robust geometry and stronger edges, while finishing inserts have sharper edges and finer chip breakers for better chip control and surface quality. The wrong use of these two greatly reduces the life of the turning tool. Coating: Modern coatings such as TiN, TiCN, TiAlN and AlCrN are thin ceramic layers that greatly improve the heat resistance, wear resistance and friction coefficient of the tool. These covers act as a thermal shield and prevent high heat from reaching the main body of the tool (substrate). Choosing the right coating for the material of the workpiece is one of the most key factors in increasing the life of the turning tool. Geometry & Chipbreaker: The shape of the chip breaker on the surface of the insert is responsible for controlling the form and direction of the chip movement. An improper chip breaker can cause chips to tangle, damage the surface of the part, and break the tool.

2. Precise adjustment of cutting parameters: speed, advance and load depth

After choosing the right tool, setting the machining parameters is the most important factor affecting the life of the turning tool. These three parameters are like the three sides of a triangle and must be in perfect balance with each other.

• Cutting Speed ​​(Vc): This parameter, which is expressed in meters per minute (m/min), has the greatest impact on the heat produced and, as a result, on the life of the turning tool. A general rule says: "By doubling the cutting speed, the life of the tool is reduced to one-eighth!" Always start at the speed recommended by the tool manufacturer's catalog. If the wear of the tool is fast, reduce the speed by 10 to 15%. Feed Rate (f): This parameter, which is defined in millimeters per revolution (mm/rev) in turning or millimeters per minute (mm/min) in milling, determines the thickness of the chip. Too little advance causes the tool to rub on the surface, increase heat and wear quickly. Too much advance also increases cutting forces and the possibility of tool breakage. Finding the optimal advance point to control the chip and maintain the life of the turning tool is an art.
• Depth of Cut (ap): This parameter determines the degree of engagement of the tool with the workpiece. The depth of cut should always be greater than the nose radius of the insert to avoid rubbing and vibration. In roughing, use the maximum allowed cutting depth to reduce the number of passes.

Golden tip: Always refer to the tool catalog that you get from Azadmehr Store. These catalogs contain detailed tables for starting parameters based on material and type of operation, which is the best starting point for optimizing and increasing the life of your turning tool.

3. Coolant (soapy water): the savior of your tools

The correct use of coolant or soapy water can increase the life of turning tools between 25 and 50%. The main functions of the coolant are:

1. Cooling: absorbing heat from the cutting area and preventing overheating of the tool and workpiece.
2. Lubrication: reducing the friction between the surface of the chip and the top of the tool.
3. Washing: removing the chips from the cutting area and preventing them from sticking.

Important points in using cooling:

• Continuous and high-pressure flow: The most important point is to apply a constant and high-pressure flow of coolant exactly to the tip of the tool and the cutting area. Disconnecting and reconnecting the current causes thermal shock to the hot insert and creates small cracks and eventually breaks it. Proper concentration: Check the soap water concentration regularly with a refractometer. A low concentration destroys the lubrication and anti-rust properties, and a high concentration causes foaming, skin problems for the operator and waste of money.
• Using internal cooling (Through Coolant): In drilling or deep milling operations, using tools and holders that have the ability to pass coolant through them is a great advantage. This ensures that the coolant reaches exactly where it is needed and maximizes the life of the turning tool.

4. Intelligent machining strategies: beyond linear motion

Today's CAM software offers very advanced machining strategies whose main goal is to maintain a constant load on the tool and increase the life of the turning tool.

• Climb Milling vs. Conventional Milling: In climb milling, the direction of rotation of the tool is the same as the direction of the table. This method removes the chip from thick to thin, produces less heat, has a better surface quality and increases the life of the turning tool. This method is recommended in most modern CNC machines.
• Trochoidal Milling: To create deep grooves, use circular or trochoidal movement paths instead of direct movement and full engagement of the tool. This method keeps the engagement angle of the tool low, allows the chip to exit better and prevents excessive heat generation.
• Smooth entry and exit (Ramping/Rolling in): Instead of vertical entry (Plunging) into the workpiece, which causes a strong impact to the tool, use ramping or arc entry (Rolling in). This work gradually increases the load and prevents the edge of the tool from filling.

5. Rigidity and stability of the system: from the spindle to the workpiece

Vibration is the number one enemy of turning tool life. Vibration causes micro-chipping on the cutting edge of the tool and destroys it quickly. To deal with vibration, the whole system must be rigid and stable:

• Tool Holder: Use high-quality, balanced and accurate tool holders such as hydraulic holders or precision collets (ER Collets). A poor quality and unbalanced holder acts like a hammer at high speeds and crushes your tool. Azadmehr store offers a complete set of standard and accurate tool holders for all types of machines.
• Tool Overhang: Always keep the length of the tool protruding from the holder as short as possible. A rule of thumb says that by doubling the length of the overhang, the stiffness is reduced to one-eighth!
• Workholding: Make sure that the work piece is firmly and stably clamped on the table or in the three systems. Any laxity or weakness in segmentation will directly lead to vibration and reduction of life of turning tool.
• Machine condition: Ensure the health of the spindle, bearings and movement guides of your machine. A worn machine cannot provide the necessary stability for optimal machining.

6. Smart Tool Wear Monitoring: Act Before Disaster

An experienced operator knows that he should not use a tool until the moment of complete failure. Changing the tool in time, before its wear exceeds the permissible limit, prevents damage to the workpiece and the tool holder and ensures the stability of the process.

• Get to know the signs of wear: Get to know the different signs of wear such as flank wear (Flank Wear), crater wear (Crater Wear) and chipping.
• Listen to the sound of machining: A sudden change in the cutting sound is usually the first sign of tool wear.
• Control the spindle load: Most CNC controls can display the current load They have the spindle. The gradual increase of the spindle load under the same cutting condition indicates the tool slowing down.
• Prediction and planning: Based on experience, define an average life for each tool (for example, a certain number of pieces or minutes of machining) and replace it before reaching the critical point. This work optimizes the life of the turning tool and minimizes the risk.

7. Proper maintenance and management of tools: order in the workshop

The last technique, which is often overlooked, is related to how to store and manage tools outside the car.

• Cleaning: Always clean the seat and the insert itself thoroughly with wind or a clean cloth before attaching the insert to the holder. A small chip or particle of dust can cause the insert to sit incorrectly and break under load.
• Using a Torque Wrench: Tighten the screw of the insert with the torque recommended by the manufacturer. Tightening too much can cause tension and cracks in the insert, and tightening less than the permissible limit will cause it to vibrate and move during cutting.
• Proper storage: Store your tools and inserts in their original boxes and in a dry place away from moisture and impact.

Azad Mehr Store: Your partner in optimizing turning processes

As you can see, extending the life of turning tools is a multifaceted process that requires knowledge, experience, and most importantly, access to the right quality tools. "Azadmehr Store" with more than two decades of experience in the field of specialized supply and distribution of cutting, turning and measuring tools, considers itself not only a seller, but a reliable partner for craftsmen.

We at Azad Mehr Store offer:

• Free technical consultation: By analyzing your machining process, our experts are ready to recommend the best and most cost-effective tools to increase your turning tool life and productivity.
• Complete set of tools: We have gathered a wide range of turning inserts, finger mills, drills, holders and other accessories from the top global brands to meet every need.
• Guarantee quality and authenticity: By buying from Azadmehr store, you will be sure of the authenticity and quality of your tools; This directly affects the life of the turning tool and the safety of your process.

Call us or visit our website so that we can take a step together towards optimizing and increasing your profitability.

Conclusion: Longer tool life, higher profitability

Increasing turning tool life is an achievable goal. This work is more than a cost, it is a smart investment in production stability, product quality and reduction of current costs. By carefully implementing the seven golden techniques mentioned in this article—from the correct selection of tools and parameters to the use of smart strategies and regular maintenance—you can have complete control over your machining process and maximize the life of your expensive tools.

Remember that in this way, "Azadmehr Store" is always by your side to help you achieve this important goal by providing high-quality tools and expert advice. Longer life for your tools means more stable production and a more prosperous business for you.