What is the process of centerless grinding?

Manufacturers often utilize centerless grinding as a machining technique to attain exact exterior diameters for cylindrical components. Centerless grinding's basic principles call for the removal of material via abrasive grinding without the use of a center enabling excellent precision and productivity. It comes in a variety of forms, including through-feed and in-feed grinding, each of which is best suited for a particular purpose. 

Good roundness and surface quality are two benefits of centerless grinding that make it perfect for mass production. One main downside is the absence of a system to guarantee positioning precision between grinding surfaces.

This article will discuss centerless grinding, how it works, its applications, benefits, and more.

What Does Centerless Grinding Mean?

A centerless grinding process positions the workpiece between two spinning grinding wheels, usually in a clockwise motion. The secondary wheel, also known as the regulating wheel, adjusts the pressure put on the workpiece while the primary grinding wheel rotates (though is otherwise fixed in position) and applies downward force. The workpiece is rotated and stabilized by the regulating wheel while it is being ground. The grinding wheel may remove any extra material that was left over after the original grinding pass using this dynamic configuration. 

How Does Centerless Grinding Work?

Centerless grinding operates on the principle of removing material from a workpiece without the need for a center point. It involves a centerless grinding machine with two grinding wheels, one fixed and the other adjustable. The workpiece is placed between these wheels, and the adjustable wheel, known as the regulating wheel, exerts pressure to control the workpiece's rotational speed. As the workpiece spins, the fixed grinding wheel grinds away material, achieving precise outer diameters or desired shapes. 

What Are the Common Applications of Centerless Grinding?

Numerous industries use centerless grinding to produce a variety of products, including: bearings, shafts, and camshafts. Its adaptability helps the hydraulic and fluid control industries as well as the medical, automotive, aerospace, and consumer goods sectors. This process is essential for creating parts like: pistons, valves, and rods because it excels at achieving accurate cylindrical forms and surface precision.

What Are the Principles of Centerless Grinding?

The eight fundamental tenets of centerless grinding are as follows:

1. Precision Beyond CNC Machining: Centerless grinding complements metal CNC machining. It addresses CNC machining's limitations in dimensions, materials, and surface finishes for parts that are out of round or challenging to mount.
2. Simplicity and Precision: Centerless grinding is relatively simple due to the minimal moving parts. It is ideal for achieving tight tolerances on small cylindrical metal parts with high-speed, continuous operation.
3. Two Grinding Methods: Through-feed grinding suits parts with consistent roundness, while in-feed grinding tackles complex shapes and notched parts like gear shafts.
4. Critical Wheel Choice: Selecting the right grinding wheel is crucial, depending on the workpiece material and desired surface finish. Super-abrasive wheels excel at grinding hard metals.
5. Angle Matters: It is important to properly set angles between the regulating and grinding wheels, as well as the workpiece rest blade. This ensures precise roundness without causing issues like chatter or crashes.
6. Coolant Use: Using coolant is essential to prevent heat buildup during grinding, ensure part tolerances, and prevent wheel damage.
7. Newer Technology: Modern centerless grinding machines feature CNC controls, advanced software, and robotic loading/unloading, enabling complex part production and efficiency improvements.
8. Skill Development: Centerless grinding expertise is typically acquired through years of experience in the industry. It emphasizes the importance of partnering with skilled practitioners for optimal results.

What Are the Different Types of Centerless Grinding?

Centerless grinding encompasses various types, categorized based on the operation of grinding and methods of feed. These categories are listed below:

Based on the Operation of Grinding:

1. External Centerless Grinding: Used for grinding external parts like rollers and tubes. It involves a grinding wheel and a regulating wheel with a supporting rest for the workpiece.
2. Internal Centerless Grinding: Used for grinding the inner portion of workpieces like tubes and holes. This method employs three rollers: the regulating roller, the supporting roller, and the pressure roller.

Based on the Methods of Feed:

1. Through-Feed Centerless Grinding: Workpieces are completely fed through the grinding wheels. This method suits plain parallel parts and long bars.
2. In-feed Centerless Grinding: Ideal for complex-shaped workpieces. It resembles plunge grinding and involves manual feeding of the workpiece.
3. End-Feed Centerless Grinding: The workpiece is fed lengthwise and ground as it progresses, suitable for components with long heads.

How To Operate a Centerless Grinding Machine?

To operate a centerless grinding machine, the process is as follows:

1. Load the workpiece between grinding and regulating wheels.
2. Adjust the regulating wheel for the desired rotational speed.
3. Choose through-feed or in-feed method.
4. Initiate grinding, ensuring the workpiece contacts the wheels.
5. Monitor roundness and adjust wheel positions as needed.
6. Maintain lubrication and cooling for heat management.

What Materials Can Be Used for Centerless Grinding?

Centerless grinding can be applied to a wide range of materials, including:

1. Metals: Such as steel, stainless steel, aluminum, brass, titanium, and superalloys like Inconel® and Hastelloy®.
2. Ceramics: Like alumina and silicon carbide.
3. Plastics: Commonly used for polymers like nylon and PEEK.

What Are the Key Components of a Centerless Grinding Machine?

A centerless grinding machine consists of several key components:

1. Grinding Wheel: The abrasive wheel that removes material from the workpiece.
2. Regulating Wheel: Controls workpiece rotation and feed rate.
3. Work Rest Blade: Supports and guides the workpiece during grinding.
4. Workpiece: The part being ground.
5. Grinding Wheel Dresser: Maintains the shape of the grinding wheel.
6. Grinding Wheel Head: The part of the machine that holds and rotates the grinding wheel, responsible for grinding precision.
7. Machine Bed: The rigid base or frame of the centerless grinding machine that provides stability and support for all other components.

How Is the Efficiency of the Centerless Grinder Compared to Other Machines?

For cylindrical workpieces, centerless grinders are typically more effective than conventional lathe machining. Centerless grinding requires less setup time due to the lack of a chuck or spindle. Furthermore, it enables exact outcomes, low operator intervention, and high-volume production. On the other side, lathe machining could need additional setups and tool changes, which makes it less effective for some applications.

What Are the Advantages of Centerless Grinding?

Here is the list of advantages of a centerless grinding machine:

1. Offers a continuous "through-grinding" process with short loading times, eliminating the need for center support.
2. The absence of centering reduces stock requirements. This leads to longer wheel life and higher yields.
3. Rigidly supports the workpiece, preventing deflection. It allows for heavier passes and consistent production. It is essential for maintaining daily volumes without disruptions.
4. Adapts easily to different part sizes, making it suitable for high-volume production.
5. Handles various sizes and shapes without imposing axial thrust on the workpiece, making it suitable for brittle and distorted materials.

What Are the Disadvantages of Centerless Grinding?

Disadvantages of centerless grinding include:

1. Difficulty in managing short but wide workpieces during grinding.
2. Adjusting for different workpiece diameters requires intricate brackets and parameter changes, unsuitable for small or one-off production.
3. Difficulty when working on objects with perpendicular features.

What Are the Reasons To Consider Centerless Grinding?

Here are the reasons to consider centerless grinding:

1. Achieves tight tolerances and excellent surface finish.
2. Fast, continuous grinding with short loading times.
3. Suitable for various materials and part sizes.
4. Reduced wear and higher yield.

Is Centerless Grinding Effective?

Yes, centerless grinding is effective. It offers high precision, efficiency, and versatility. Centerless grinding is a reliable choice for achieving tight tolerances, smooth finishes, and efficient material removal across various applications, from manufacturing to aerospace and automotive industries.

What Factors Affect the Precision and Quality of Centerless Grinding?

Centerless grinding precision and quality are influenced by various factors:

1. Workpiece Material: The type and hardness of the material impact the grinding process.
2. Regulating Wheel: Its material quality, condition, and smoothness affect results.
3. Wheel Alignment: Proper alignment ensures precise grinding.
4. Grinding Speed: Controlled speed prevents overheating and maintains quality.
5. Machine Condition: Well-maintained equipment is crucial.
6. Operator Skill: Skilled operators ensure consistent results.

What Are the Safety Considerations in Centerless Grinding?

Safety is paramount in centerless grinding. Some safety considerations are:

1. Use safety goggles to shield from sparks and debris.
2. Ensure machine guards are in place to prevent contact with moving parts.
3. Properly secure workpieces to prevent ejection.
4. Maintain adequate ventilation to remove dust and fumes.
5. Train operators on safe procedures and emergency protocols.

What Industries Rely Heavily on Centerless Grinding?

Several industries heavily rely on centerless grinding for precision "grinding work." These include: automotive, aerospace, medical, and energy. In automotive, centerless grinding is used for parts like: shafts, bushings, and bearings. For aerospace, in critical components such as turbine blades. Centerless grinding is used in manufacturing surgical instruments and implants in medical. In energy, it is used for producing parts for turbines and pumps.

Is the Centerless Grinding Method the Most Common?

Yes, among various grinding methods, centerless grinding is one of the most common. It's widely employed due to its efficiency in processing cylindrical workpieces without the need for a center hole. It is suitable for various applications, unlike specific tasks like surface or internal grinding.

What Are the Differences Between Centerless Grinding and Blanchard Grinding?

Blanchard grinding and centerless grinding are two different machining techniques. Blanchard grinding removes material from the top surface of a workpiece, whereas centerless grinding removes material from the outside diameter. Blanchard, with its vertical spindle and rotating table, is more suited for flat surfaces than centerless grinding, which is best for cylindrical parts.

Summary

This article presented centerless grinding, explained it, and discussed its principles and how it works. To learn more about centerless grinding, contact a Xometry representative.

Xometry provides a wide range of manufacturing capabilities, including machining and other value-added services for all of your prototyping and production needs. Visit our website to learn more or to request a free, no-obligation quote.

Copyright and Trademark Notices

1. Inconel® is a registered trademark of Special Metals Corporation
2. Hastelloy® is a registered trademark of Haynes International, Inc.

Disclaimer

The content appearing on this webpage is for informational purposes only. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometry's network. Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Please refer to our terms and conditions for more information.

Machining process

Centerless grinding is a machining process that uses abrasive cutting to remove material from a workpiece.[1] Centerless grinding differs from centered grinding operations in that no spindle or fixture is used to locate and secure the workpiece;[2] the workpiece is secured between two rotary grinding wheels, and the speed of their rotation relative to each other determines the rate at which material is removed from the workpiece.[1]

Centerless grinding is typically used in preference to other grinding processes for operations where many parts must be processed in a short time.[1]

Working principle

[

edit

]

In centerless grinding, the workpiece is held between two wheels, rotating in the same direction at different speeds, and a work-holding platform. One wheel, known as the grinding wheel (stationary wheel in the diagram), is on a fixed axis and rotates such that the force applied to the workpiece is directed downward, against the work-holding platform. This wheel usually performs the grinding action by having a higher tangential speed than the workpiece at the point of contact. The other wheel, known as the regulating wheel (moving wheel in the diagram), is movable. This wheel is positioned to apply lateral pressure to the workpiece, and usually has either a very rough or rubber-bonded abrasive to trap the workpiece.[1]

The speed of the two wheels relative to each other provides the grinding action and determines the rate at which material is removed from the workpiece. During operation the workpiece turns with the regulating wheel, with the same linear velocity at the point of contact and (ideally) no slipping. The grinding wheel turns faster, slipping past the surface of the workpiece at the point of contact and removing chips of material as it passes.[1]

Types

[

edit

]

There are three forms of centerless grinding, differentiated primarily by the method used to feed the workpiece through the machine.

In through-feed centerless grinding, the workpiece is fed through the grinding wheels completely, entering on one side and exiting on the opposite. The regulating wheel in through-feed grinding is canted away from the plane of the grinding wheel in such a way as to provide an axial force component, feeding the workpiece through between the two wheels. Through-feed grinding can be very efficient because it does not require a separate feed mechanism; however, it can only be used for parts with a simple cylindrical shape.[2]

In end-feed centerless grinding, the workpiece is fed axially into the machine on one side and comes to rest against an end stop; the grinding operation is performed, and then the workpiece is fed in the opposite direction to exit the machine.[2] End-feed grinding is best for tapered workpieces.[1][2]

In-feed centerless grinding is used to grind workpieces with relatively complex shapes, such as an hourglass shape. Before the process begins, the workpiece is loaded manually into the grinding machine and the regulating wheel is moved into place. The complexity of the part shapes and grinding wheel shapes required to grind them accurately prevent the workpiece from being fed axially through the machine.[2]

Equipment

[

edit

]

Centerless grinding uses purpose-built centerless grinding machines. Such a machine will always include the grinding wheel, regulating wheel, and some means of supporting a workpiece. Modern machines may involve computer numerical control to allow automation and improve precision. Grinding wheels are interchangeable, to allow for different grits and shapes. Machines designed to accommodate through-feed grinding operations will allow the angle of the regulating wheel to be adjusted, to accommodate parts of different sizes.

See also

[

edit

]

References

[

edit

]

Good roundness and surface quality are two benefits of centerless grinding that make it perfect for mass production. One main downside is the absence of a system to guarantee positioning precision between grinding surfaces.

This article will discuss centerless grinding, how it works, its applications, benefits, and more.

What Does Centerless Grinding Mean?

A centerless grinding process positions the workpiece between two spinning grinding wheels, usually in a clockwise motion. The secondary wheel, also known as the regulating wheel, adjusts the pressure put on the workpiece while the primary grinding wheel rotates (though is otherwise fixed in position) and applies downward force. The workpiece is rotated and stabilized by the regulating wheel while it is being ground. The grinding wheel may remove any extra material that was left over after the original grinding pass using this dynamic configuration. 

How Does Centerless Grinding Work?

Centerless grinding operates on the principle of removing material from a workpiece without the need for a center point. It involves a centerless grinding machine with two grinding wheels, one fixed and the other adjustable. The workpiece is placed between these wheels, and the adjustable wheel, known as the regulating wheel, exerts pressure to control the workpiece's rotational speed. As the workpiece spins, the fixed grinding wheel grinds away material, achieving precise outer diameters or desired shapes. 

What Are the Common Applications of Centerless Grinding?

Numerous industries use centerless grinding to produce a variety of products, including: bearings, shafts, and camshafts. Its adaptability helps the hydraulic and fluid control industries as well as the medical, automotive, aerospace, and consumer goods sectors. This process is essential for creating parts like: pistons, valves, and rods because it excels at achieving accurate cylindrical forms and surface precision.

What Are the Principles of Centerless Grinding?

The eight fundamental tenets of centerless grinding are as follows:

1. Precision Beyond CNC Machining: Centerless grinding complements metal CNC machining. It addresses CNC machining's limitations in dimensions, materials, and surface finishes for parts that are out of round or challenging to mount.
2. Simplicity and Precision: Centerless grinding is relatively simple due to the minimal moving parts. It is ideal for achieving tight tolerances on small cylindrical metal parts with high-speed, continuous operation.
3. Two Grinding Methods: Through-feed grinding suits parts with consistent roundness, while in-feed grinding tackles complex shapes and notched parts like gear shafts.
4. Critical Wheel Choice: Selecting the right grinding wheel is crucial, depending on the workpiece material and desired surface finish. Super-abrasive wheels excel at grinding hard metals.
5. Angle Matters: It is important to properly set angles between the regulating and grinding wheels, as well as the workpiece rest blade. This ensures precise roundness without causing issues like chatter or crashes.
6. Coolant Use: Using coolant is essential to prevent heat buildup during grinding, ensure part tolerances, and prevent wheel damage.
7. Newer Technology: Modern centerless grinding machines feature CNC controls, advanced software, and robotic loading/unloading, enabling complex part production and efficiency improvements.
8. Skill Development: Centerless grinding expertise is typically acquired through years of experience in the industry. It emphasizes the importance of partnering with skilled practitioners for optimal results.

What Are the Different Types of Centerless Grinding?

Centerless grinding encompasses various types, categorized based on the operation of grinding and methods of feed. These categories are listed below:

Based on the Operation of Grinding:

1. External Centerless Grinding: Used for grinding external parts like rollers and tubes. It involves a grinding wheel and a regulating wheel with a supporting rest for the workpiece.
2. Internal Centerless Grinding: Used for grinding the inner portion of workpieces like tubes and holes. This method employs three rollers: the regulating roller, the supporting roller, and the pressure roller.

Based on the Methods of Feed:

1. Through-Feed Centerless Grinding: Workpieces are completely fed through the grinding wheels. This method suits plain parallel parts and long bars.
2. In-feed Centerless Grinding: Ideal for complex-shaped workpieces. It resembles plunge grinding and involves manual feeding of the workpiece.
3. End-Feed Centerless Grinding: The workpiece is fed lengthwise and ground as it progresses, suitable for components with long heads.

How To Operate a Centerless Grinding Machine?

To operate a centerless grinding machine, the process is as follows:

1. Load the workpiece between grinding and regulating wheels.
2. Adjust the regulating wheel for the desired rotational speed.
3. Choose through-feed or in-feed method.
4. Initiate grinding, ensuring the workpiece contacts the wheels.
5. Monitor roundness and adjust wheel positions as needed.
6. Maintain lubrication and cooling for heat management.

What Materials Can Be Used for Centerless Grinding?

Centerless grinding can be applied to a wide range of materials, including:

1. Metals: Such as steel, stainless steel, aluminum, brass, titanium, and superalloys like Inconel® and Hastelloy®.
2. Ceramics: Like alumina and silicon carbide.
3. Plastics: Commonly used for polymers like nylon and PEEK.

What Are the Key Components of a Centerless Grinding Machine?

A centerless grinding machine consists of several key components:

1. Grinding Wheel: The abrasive wheel that removes material from the workpiece.
2. Regulating Wheel: Controls workpiece rotation and feed rate.
3. Work Rest Blade: Supports and guides the workpiece during grinding.
4. Workpiece: The part being ground.
5. Grinding Wheel Dresser: Maintains the shape of the grinding wheel.
6. Grinding Wheel Head: The part of the machine that holds and rotates the grinding wheel, responsible for grinding precision.
7. Machine Bed: The rigid base or frame of the centerless grinding machine that provides stability and support for all other components.

How Is the Efficiency of the Centerless Grinder Compared to Other Machines?

For cylindrical workpieces, centerless grinders are typically more effective than conventional lathe machining. Centerless grinding requires less setup time due to the lack of a chuck or spindle. Furthermore, it enables exact outcomes, low operator intervention, and high-volume production. On the other side, lathe machining could need additional setups and tool changes, which makes it less effective for some applications.

What Are the Advantages of Centerless Grinding?

Here is the list of advantages of a centerless grinding machine:

1. Offers a continuous "through-grinding" process with short loading times, eliminating the need for center support.
2. The absence of centering reduces stock requirements. This leads to longer wheel life and higher yields.
3. Rigidly supports the workpiece, preventing deflection. It allows for heavier passes and consistent production. It is essential for maintaining daily volumes without disruptions.
4. Adapts easily to different part sizes, making it suitable for high-volume production.
5. Handles various sizes and shapes without imposing axial thrust on the workpiece, making it suitable for brittle and distorted materials.

What Are the Disadvantages of Centerless Grinding?

Disadvantages of centerless grinding include:

1. Difficulty in managing short but wide workpieces during grinding.
2. Adjusting for different workpiece diameters requires intricate brackets and parameter changes, unsuitable for small or one-off production.
3. Difficulty when working on objects with perpendicular features.

What Are the Reasons To Consider Centerless Grinding?

Here are the reasons to consider centerless grinding:

1. Achieves tight tolerances and excellent surface finish.
2. Fast, continuous grinding with short loading times.
3. Suitable for various materials and part sizes.
4. Reduced wear and higher yield.

Is Centerless Grinding Effective?

Yes, centerless grinding is effective. It offers high precision, efficiency, and versatility. Centerless grinding is a reliable choice for achieving tight tolerances, smooth finishes, and efficient material removal across various applications, from manufacturing to aerospace and automotive industries.

What Factors Affect the Precision and Quality of Centerless Grinding?

Centerless grinding precision and quality are influenced by various factors:

1. Workpiece Material: The type and hardness of the material impact the grinding process.
2. Regulating Wheel: Its material quality, condition, and smoothness affect results.
3. Wheel Alignment: Proper alignment ensures precise grinding.
4. Grinding Speed: Controlled speed prevents overheating and maintains quality.
5. Machine Condition: Well-maintained equipment is crucial.
6. Operator Skill: Skilled operators ensure consistent results.

What Are the Safety Considerations in Centerless Grinding?

Safety is paramount in centerless grinding. Some safety considerations are:

1. Use safety goggles to shield from sparks and debris.
2. Ensure machine guards are in place to prevent contact with moving parts.
3. Properly secure workpieces to prevent ejection.
4. Maintain adequate ventilation to remove dust and fumes.
5. Train operators on safe procedures and emergency protocols.

What Industries Rely Heavily on Centerless Grinding?

Several industries heavily rely on centerless grinding for precision "grinding work." These include: automotive, aerospace, medical, and energy. In automotive, centerless grinding is used for parts like: shafts, bushings, and bearings. For aerospace, in critical components such as turbine blades. Centerless grinding is used in manufacturing surgical instruments and implants in medical. In energy, it is used for producing parts for turbines and pumps.

Is the Centerless Grinding Method the Most Common?

Yes, among various grinding methods, centerless grinding is one of the most common. It's widely employed due to its efficiency in processing cylindrical workpieces without the need for a center hole. It is suitable for various applications, unlike specific tasks like surface or internal grinding.

What Are the Differences Between Centerless Grinding and Blanchard Grinding?

Blanchard grinding and centerless grinding are two different machining techniques. Blanchard grinding removes material from the top surface of a workpiece, whereas centerless grinding removes material from the outside diameter. Blanchard, with its vertical spindle and rotating table, is more suited for flat surfaces than centerless grinding, which is best for cylindrical parts.

Summary

This article presented centerless grinding, explained it, and discussed its principles and how it works. To learn more about centerless grinding, contact a Xometry representative.

Xometry provides a wide range of manufacturing capabilities, including machining and other value-added services for all of your prototyping and production needs. Visit our website to learn more or to request a free, no-obligation quote.

Copyright and Trademark Notices

1. Inconel® is a registered trademark of Special Metals Corporation
2. Hastelloy® is a registered trademark of Haynes International, Inc.

Disclaimer

The content appearing on this webpage is for informational purposes only. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometry's network. Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Please refer to our terms and conditions for more information.

Machining process

Centerless grinding is a machining process that uses abrasive cutting to remove material from a workpiece.[1] Centerless grinding differs from centered grinding operations in that no spindle or fixture is used to locate and secure the workpiece;[2] the workpiece is secured between two rotary grinding wheels, and the speed of their rotation relative to each other determines the rate at which material is removed from the workpiece.[1]

Centerless grinding is typically used in preference to other grinding processes for operations where many parts must be processed in a short time.[1]

If you want to learn more, please visit our website china turning shaft companies.

Working principle

[

edit

]

In centerless grinding, the workpiece is held between two wheels, rotating in the same direction at different speeds, and a work-holding platform. One wheel, known as the grinding wheel (stationary wheel in the diagram), is on a fixed axis and rotates such that the force applied to the workpiece is directed downward, against the work-holding platform. This wheel usually performs the grinding action by having a higher tangential speed than the workpiece at the point of contact. The other wheel, known as the regulating wheel (moving wheel in the diagram), is movable. This wheel is positioned to apply lateral pressure to the workpiece, and usually has either a very rough or rubber-bonded abrasive to trap the workpiece.[1]

The speed of the two wheels relative to each other provides the grinding action and determines the rate at which material is removed from the workpiece. During operation the workpiece turns with the regulating wheel, with the same linear velocity at the point of contact and (ideally) no slipping. The grinding wheel turns faster, slipping past the surface of the workpiece at the point of contact and removing chips of material as it passes.[1]

Types

[

edit

]

There are three forms of centerless grinding, differentiated primarily by the method used to feed the workpiece through the machine.

In through-feed centerless grinding, the workpiece is fed through the grinding wheels completely, entering on one side and exiting on the opposite. The regulating wheel in through-feed grinding is canted away from the plane of the grinding wheel in such a way as to provide an axial force component, feeding the workpiece through between the two wheels. Through-feed grinding can be very efficient because it does not require a separate feed mechanism; however, it can only be used for parts with a simple cylindrical shape.[2]

In end-feed centerless grinding, the workpiece is fed axially into the machine on one side and comes to rest against an end stop; the grinding operation is performed, and then the workpiece is fed in the opposite direction to exit the machine.[2] End-feed grinding is best for tapered workpieces.[1][2]

In-feed centerless grinding is used to grind workpieces with relatively complex shapes, such as an hourglass shape. Before the process begins, the workpiece is loaded manually into the grinding machine and the regulating wheel is moved into place. The complexity of the part shapes and grinding wheel shapes required to grind them accurately prevent the workpiece from being fed axially through the machine.[2]

Equipment

[

edit

]

Centerless grinding uses purpose-built centerless grinding machines. Such a machine will always include the grinding wheel, regulating wheel, and some means of supporting a workpiece. Modern machines may involve computer numerical control to allow automation and improve precision. Grinding wheels are interchangeable, to allow for different grits and shapes. Machines designed to accommodate through-feed grinding operations will allow the angle of the regulating wheel to be adjusted, to accommodate parts of different sizes.

See also

[

edit

]

References

[

edit

]

Are you interested in learning more about principle of lathe machine? Contact us today to secure an expert consultation!