Centerless Grinding Machine

In the grinding sector, centerless grinding machine is a machining procedure that uses abrasive cutting to remove material from a work piece. Centerless grinding is different from centered grinding operations in that no spindle or fixture is used to locate and secure the work piece, and the work piece is secured between two rotary grinding wheels only, while the speed of their rotation relative to each other determines the rate where material is removed from the work piece. 

Simply put, Centerless grinding is usually used in the preference to other grinding processes for operations in which many parts must be processed in a short period of time. The development of grinding goes with the development of lathe and milling machines as grinding is integrated as one of the machining process in the modern metalworking procedure, achieving the finishing part. It is important for a production line to have a well-developed grinding station to deal with all their milled and turned work pieces so that the following assembly, boring, or other processes can be well done afterward.

JPC-AI

Manufacturers

Recommendation

Supertec

Recommendation

CNC 3-Axes Complex Grinder / GM-35CNC I/O Type

Booths: North Building, Level 3 - 236922

More
E-Tech

Recommendation

Precision Hybird ID & OD Grinder / EGM-350 CNC

Booths: N/A

More
Shine

Recommendation

Rotary Surface Grinders / RG-400NC

Booths: N/A

More
Proma

Recommendation

Cylindrical Grinding Machine / H-Type, H130/H160/H200

Booths: N/A

More
Chang Chun Hsiung

Recommendation

Double Column Grinding Machine / CG-100NC

Booths: N/A

More
Chia Lern

Recommendation

CNC Multi-Purpose Punch Grinder / CH-CM0303

Booths: N/A

More

Centerless Grinding Machine

Supertec

Centerless Grinding Machine

CNC Centerless Grinder / STC-20CNC

Booths: North Building, Level 3 - 236922

More
E-Tech

Centerless Grinding Machine

CNC Centerless Grinding Machine / ECG CNC Series

Booths: N/A

More

Cylindrical Grinding Machine

Supertec

Cylindrical Grinding Machine

CNC Cylindrical Grinder Angular Type / G32A-80CNC

Booths: North Building, Level 3 - 236922

More
Proma

Cylindrical Grinding Machine

Cylindrical Grinding Machine / H-Type, H130/H160/H200

Booths: N/A

More

Internal Grinding Machine

Supertec

Internal Grinding Machine

CNC 3-Axes Complex Grinder / GM-35CNC I/O Type

Booths: North Building, Level 3 - 236922

More

Surface Grinding Machine

Supertec

Surface Grinding Machine

CNC Double Column Surface Grinder / SPG-2040CNC

Booths: North Building, Level 3 - 236922

More
Shine

Surface Grinding Machine

Rotary Surface Grinders / RG-400NC

Booths: N/A

More
Chang Chun Hsiung

Surface Grinding Machine

Double Column Grinding Machine / CG-100NC

Booths: N/A

More
E-Tech

Surface Grinding Machine

CNC Surface and Profile Grinder / EASY Series

Booths: N/A

More

Surface Rotary Grinding Machine

Shine

Surface Rotary Grinding Machine

Rotary Surface Grinders / RG-400NC

Booths: N/A

More

Tool and Cutter Grinding Machine

Universal Grinding Machine

Supertec

Universal Grinding Machine

CNC Universal Cylindrical Grinder / PMG-60CNC

Booths: North Building, Level 3 - 236922

More
Chia Lern

Universal Grinding Machine

CNC Multi-Purpose Punch Grinder / CH-CM0303

Booths: N/A

More

Types of Centerless Grinding Machine

In the grinding sector, centerless grinding machine is a machining procedure that uses abrasive cutting to remove material from a work piece. Centerless grinding is different from centered grinding operations in that no spindle or fixture is used to locate and secure the work piece, and the work piece is secured between two rotary grinding wheels only, while the speed of their rotation relative to each other determines the rate where material is removed from the work piece. Simply put, Centerless grinding is usually used in the preference to other grinding processes for operations in which many parts must be processed in a short period of time.

Grinding wheels and operation

In the grinding machine, each grain of abrasive on the wheel's surface cuts a small chip from the work pieces through shear deformation method. The machine inventory in the grinding machinery is huge and the classification is complicated due to the purpose and application differences. Regarding the grinder inventory, there are roughly some of them that are the mostly recognizable: belt grinder, bench grinder, cylindrical grinder, surface grinder, tool & cutter grinder, jig grinder, gear grinder, die grinder, angle grinder, and roll grinder. On the centerless grinding, the work piece is clamped between two wheels, rotating in the same direction at different speeds, and a work holding platform such as a magnetic chuck.

Wheels and grinding

One wheel is on a fixed axis and rotates such that the force applied to the work piece is directed downward, against the work holding platform. This wheel, as is designed to, usually performs the grinding actions by having a higher tangential speed than the work piece at the point of contacting timing and sides. The other wheel, which is known as the regulating wheel is movable. This wheel is positioned to apply lateral pressure to the work piece, and usually has either a very rough or rubber-bonded abrasive to trap the work piece.

Speed of the wheel

The speed of the two wheels relative to each other provides the grinding actions and determines the rate at which material is removed from the work piece. During operation, the work piece turns with the regulating wheel, with the same linear velocity at the point of contact and no slipping. Therefore, the grinding wheel turns faster, slipping past the surface of the work piece at the point of contact, and eventually, removing chips of material as it passes by.

Carefully made

Centerless grinding utilizes purpose-built centerless grinding machines. Such a machine will always include some of the critical components, such as the grinding wheel, regulating wheel, and some means of supporting a work piece. Modern machines may involve computer numerical control (CNC) to allow automation and improve precision. The grinding wheels are interchangeable for operators, and this is designed so in order to allow for different grits and shapes based on the tasks. 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 and materials.

Regarding the end-feed centerless grinding, the work piece component is fed axially into the machine on one direction and comes to rest against an end stop. The grinding operation is performed this way and then the work piece is fed in the other side, the opposite direction in order to exit the machine. To sum up, the end-feed grinding is best for tapered work pieces. On the contrary, the in-feed centerless grinding is applied to grind work pieces that are with relatively complex profiles and shapes, such as hourglass shape, curved cylinders, bent-like tubes, etc. Before the process begins, the work piece is loaded by workers manually onto the grinding machine and the regulating wheel is moved into the right position. The complexity of the part shapes and grinding wheel shapes demanded to grind them accurately will prevent the work piece from being fed axially through the machine which is not proper.

Cylindrical and centerless

In comparing the centerless grinder and the cylindrical grinders, it is important that centerless grinding is distinguished from centered grinding operations such as cylindrical and internal grinding procedures in that no spindle or fixture is used to locate and secure the work piece, so that the work piece is simply secured between two rotary grinding wheels only, and the speed of their rotation relative to each other will determine the rate where the material (work piece) is removed from the process axial.

The development of grinding goes with the development of lathe and milling machines as grinding is integrated as one of the machining process in the modern metalworking procedure, achieving the finishing part. It is important for a production line to have a well developed grinding station to deal with all their milled and turned work pieces so that the following assembly, boring, or other processes can be well done afterwards.

Need help searching for your next Centerless Grinding Machine?

MTS Online Exhibition includes manufacturers from around the world. Send us a message with your requirements and we will help by giving you manufacturer suggestions. Or, you can choose to search through the manufacturer database, and send inquiries to them directly.

Contact MTS