30+ Tool Engineer Interview Questions and Answers

The runout allowance of a reamer and drill refers to the acceptable amount of deviation from perfect alignment during operation.

• Runout allowance is a measure of how much the cutting edge of the tool can deviate from the desired path.

• It is important to have a small runout allowance to ensure accurate and precise machining.

• The runout allowance can vary depending on the specific application and the tolerance requirements.

• For example, in high-precision machining, the runout allow...read more

The name of the surface grinding wheel material is abrasive.

• The most common abrasive materials used in surface grinding wheels are aluminum oxide, silicon carbide, and diamond.

• The choice of abrasive material depends on the type of material being ground and the desired finish.

• Aluminum oxide is the most commonly used abrasive material for general purpose grinding, while silicon carbide is used for harder materials like ceramics and titanium.

• Diamond abrasive wheels are used for ...read more

The pre drill for tap should be selected based on the material being drilled and the size of the tap.

• Consider the material being drilled: Different materials require different pre drill sizes. So, it is important to know the material before selecting the pre drill.

• Refer to tap drill charts: Tap drill charts provide recommended pre drill sizes for different tap sizes and materials. These charts can be found in machining handbooks or online.

• Calculate the pre drill size: In some...read more

Controlling roughness in grinding involves adjusting parameters, using proper grinding techniques, and maintaining the grinding machine.

• Adjust grinding parameters such as speed, feed rate, and depth of cut to achieve desired roughness.

• Use the appropriate grinding wheel with the right grit size and hardness for the material being ground.

• Ensure the grinding machine is properly maintained and in good condition.

• Apply coolant or lubricant during grinding to reduce friction and hea...read more

I maintain the inventory by implementing a systematic approach that includes regular audits, accurate record-keeping, and efficient replenishment strategies.

• Conduct regular audits to ensure accuracy and identify any discrepancies or shortages.

• Maintain accurate records of inventory levels, including item descriptions, quantities, and locations.

• Implement efficient replenishment strategies based on demand forecasting and lead times.

• Utilize inventory management software or tools ...read more

A die is a specialized tool used in manufacturing to shape or cut materials into specific shapes or forms.

• Dies are commonly used in metalworking to create parts for machinery and other equipment.

• They can also be used in the production of plastic and rubber components.

• Dies can be made from a variety of materials, including steel, carbide, and ceramic.

• They are often used in conjunction with a press or other machinery to apply force and shape the material.

• Examples of products ma...read more

Mould is a hollow container used to give shape to molten or liquid material as it cools and solidifies.

• Moulds are commonly used in manufacturing processes to create products with specific shapes and sizes.

• They can be made from a variety of materials, including metal, plastic, and silicone.

• Moulds can be simple or complex, depending on the product being made.

• Examples of products made using moulds include plastic toys, metal car parts, and silicone baking pans.

• Moulds can also be...read more

Yes, I am knowledgeable about progressive tooling.

• I have experience designing and implementing progressive tooling systems.

• I am familiar with the various components and processes involved in progressive tooling.

• I have worked on projects where progressive tooling was utilized to increase efficiency and productivity.

GD&T (Geometric Dimensioning and Tolerancing) is a system for defining and communicating engineering tolerances.

• GD&T is used to specify the allowable variations in form, size, and orientation of part features.

• It helps ensure that parts fit together properly and function as intended.

• GD&T uses symbols, such as position, concentricity, and profile, to communicate tolerances.

• It is commonly used in engineering drawings and manufacturing processes.

• Example: Using GD&T, a designer ca...read more

Press tools are used to shape and cut materials. They can be classified as blanking, piercing, bending, and forming tools.

• Blanking tools are used to cut flat shapes from sheet metal.

• Piercing tools are used to create holes in sheet metal.

• Bending tools are used to bend sheet metal into various shapes.

• Forming tools are used to shape sheet metal into complex shapes.

• Common materials used for press tools include high-speed steel, carbide, and ceramic.

Press tools are used in manufacturing to shape and cut materials. There are various types of press tools.

• Blanking tool

• Piercing tool

• Bending tool

• Drawing tool

• Forming tool

• Coining tool

• Embossing tool

• Extrusion tool

MTTR stands for Mean Time To Repair, MTBF stands for Mean Time Between Failures, and PM is done through preventive maintenance.

• MTTR is the average time taken to repair a failed system or component.

• MTBF is the average time between failures of a system or component.

• Preventive maintenance (PM) involves regularly scheduled maintenance tasks to prevent failures and prolong the life of equipment.

• PM can include tasks such as lubrication, inspections, and replacements of worn parts.

First angle image and third angle image are two different methods of representing a 3D object in 2D engineering drawings.

• First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.

• In first angle projection, the object is placed in front of the viewing plane, while in third angle projection, the object is placed behind the viewing plane.

• In first angle projection, the views are obtained by projecting lines from the...read more

Yes, I have 2 years of experience working with family moulds.

• During my time working with family moulds, I gained experience in creating and maintaining moulds for multiple parts.

• I also learned how to troubleshoot and fix issues with the moulds to ensure efficient production.

• One example of a project I worked on was creating a family mould for a set of plastic utensils, which required precise measurements and attention to detail.

• Overall, my experience with family moulds has tau...read more

I have experience working with both hot and cold moulds.

• I have worked with hot moulds in the production of plastic parts that require high temperature and pressure.

• I have also worked with cold moulds in the production of parts that require precision and accuracy.

• I am familiar with the different materials used in both hot and cold moulding processes.

• I have experience troubleshooting issues that may arise during the moulding process, such as warping or cracking.

• I am able to adj...read more

The design and material selection of the die components play a main role in progressive dies.

• Design of the die components should ensure proper clearance and alignment

• Material selection should consider factors such as wear resistance and toughness

• Proper maintenance and lubrication is also important for optimal performance

• Examples of die components include punches, dies, strippers, and guide pins

Our company culture values innovation, collaboration, and continuous improvement.

• We encourage open communication and feedback among team members.

• We prioritize safety and quality in all aspects of our work.

• We promote a growth mindset and support ongoing learning and development.

• We respect diversity and inclusivity in our workplace.

• We adhere to ethical and legal standards in all our operations.

Preventive maintenance is a proactive approach to maintenance that involves regularly scheduled inspections and repairs to prevent equipment failure.

• Create a maintenance schedule based on manufacturer recommendations and equipment usage

• Perform regular inspections to identify potential issues before they become major problems

• Replace worn or damaged parts before they fail

• Keep accurate records of maintenance activities

• Train employees on proper equipment use and maintenance proce...read more

Springs are used in various applications. Different types of springs are used based on their properties and applications.

• Compression springs are used in shock absorbers, mattresses, and car suspensions.

• Torsion springs are used in clothespins, mousetraps, and door hinges.

• Extension springs are used in garage doors, trampolines, and toys.

• Constant force springs are used in retractable pens, tape measures, and window shades.

• Wave springs are used in seals, valves, and bearings.

• Spir...read more

Cutting clearance for fine tool is crucial for precision and accuracy.

• Cutting clearance should be minimal for fine tools to prevent deflection and ensure accuracy.

• The clearance should be determined based on the material being cut and the tool being used.

• For example, a carbide end mill may require a smaller clearance than a high-speed steel tool.

• The cutting speed and feed rate should also be considered when determining the clearance.

• Regular maintenance and inspection of the to...read more

Hole basis system is a type of fit system used in engineering to determine the tolerance between two mating parts.

• In this system, the size of the hole is kept constant and the size of the shaft is varied to achieve the desired fit.

• It is commonly used in applications where the hole is the more critical component, such as bearings or bushings.

• The fit is determined by the difference between the maximum shaft size and the minimum hole size.

• Examples of hole basis fits include H7/p...read more

The drill size for an 8 mm tapping depends on the thread pitch and material being tapped.

• The drill size should be slightly smaller than the minor diameter of the thread being tapped.

• For example, for an M8x1.25 thread in steel, the recommended drill size is 6.8 mm.

• Consult a tap drill chart or use a tap drill calculator to determine the appropriate drill size.

• Consider the material being tapped and adjust the drill size accordingly to avoid breaking the tap.

The hole size for 16 mm tapping depends on the type of thread and material being tapped.

• The recommended hole size for a 16 mm tapping with a coarse thread in steel is 14.5 mm.

• For a fine thread in aluminum, the recommended hole size is 15.5 mm.

• It is important to consult a tap drill chart to determine the appropriate hole size for the specific tapping operation.

• Factors such as material type, thread type, and tap geometry can all affect the recommended hole size.

To calculate press force, multiply the area of the part being pressed by the pressure applied.

• Determine the area of the part being pressed

• Determine the pressure being applied

• Multiply the area by the pressure to get the press force

• Press Force = Area x Pressure

TPM stands for Total Productive Maintenance. Its purpose is to maximize equipment effectiveness and minimize downtime.

• TPM involves regular maintenance and inspection of equipment

• It aims to prevent breakdowns and improve overall equipment efficiency

• TPM also involves training and involving all employees in maintenance activities

• Examples of TPM tools include visual management, 5S, and autonomous maintenance

The basic tool structure consists of a handle, shank, and working end.

• The handle is the part held by the user and provides grip and control.

• The shank connects the handle to the working end and may be straight or angled.

• The working end is the part that performs the intended task, such as cutting or drilling.

• Examples include a hammer with a wooden handle, a screwdriver with a metal shank, and a saw with a toothed working end.

Theory of machine and material science are two important fields in engineering.

• Theory of machine deals with the study of machines and their mechanisms.

• It involves the analysis of forces, motion, and energy in machines.

• Material science is the study of materials and their properties.

• It involves the analysis of the structure, properties, and behavior of materials.

• Both fields are important in the design and development of machines and materials.

• For example, in the design of a car...read more

The recommended hole size for M8 tapping is 6.8mm.

• The hole size should be 1.25 times the major diameter of the tap.

• For M8 tapping, the major diameter is 8mm, so the hole size should be 6.8mm.

• The hole should be drilled to a depth of at least 1.5 times the diameter of the tap.

• Use a tap drill chart to determine the correct hole size for other tapping sizes.

I have experience with spray painting in various settings.

• I have used spray paint for DIY projects at home.

• I have also used spray paint in a professional setting for painting machinery parts.

• I am familiar with different types of spray paint and their applications.

• I understand the importance of proper ventilation and safety precautions when using spray paint.

5S is a workplace organization method focusing on efficiency and safety, while Kaizen is a continuous improvement philosophy.

• 5S stands for Sort, Set in order, Shine, Standardize, Sustain

• Kaizen is a Japanese term meaning 'continuous improvement'

• Combining 5S and Kaizen helps in creating a culture of continuous improvement in the workplace

• Example: Implementing 5S by organizing tools in a designated area and continuously improving the layout based on feedback

The angle of a drill bit refers to the angle between the cutting edge of the bit and the surface being drilled.

• The angle of the drill bit affects the type of material it can effectively drill through.

• Common drill bit angles include 118 degrees for general purpose drilling and 135 degrees for drilling harder materials.

• The angle can also impact the efficiency and precision of the drilling process.