| Grinding

Overland utilizes various grinding operations to finish precision CNC machining components, depending on the size, shape, features, and desired production rate of the workpieces. These grinding operations are chosen to achieve high surface quality, low surface roughness, and high accuracy of shape and dimension. The selection of the appropriate grinding operation is crucial to meet the specific requirements of each workpiece.

| Surface grinding

The surface grinding machine at Overland is equipped with advanced features including 3-axis automatic movement with incremental downfeed, electronic auto-crossfeed, and proportional valve hydraulic powered table movement. It is specifically designed to achieve highly flat surfaces and excellent surface roughness.

This machine is suitable for producing smooth and accurate finishes on both metal and non-metal flat surfaces. It utilizes a rotating wheel with bonded abrasives that remove the surface material. As the moving abrasive particles come into contact with the workpiece, they act as miniature cutting tools, each chip cutting a tiny chip from the workpiece.

By utilizing this surface grinding machine, Overland can achieve precise and high-quality finishes on flat surfaces, meeting the requirements for flatness and surface roughness.

| Outside Diameter Grinding

OD (Outside Diameter) grinding is a grinding process that focuses on grinding the external surface of a workpiece between two centers. In this process, the workpiece is held between two centers, and the centers touch both ends of the workpiece while rotating.

Cylindrical OD grinding is particularly suitable for parts that have single or multiple diameters and require concentricity between them or precise alignment between centers. This grinding method ensures that the outer diameter of the workpiece is accurately ground and meets the required specifications.

By utilizing OD grinding, Overland can achieve precise and concentric outer diameters on workpieces, ensuring they meet the desired dimensional and alignment requirements.

| Infeed Grinding

In contrast to OD grinding, infeed grinding does not require the use of collets or centers to hold the workpiece in place. Instead, an adjusting wheel is positioned on the opposite side of the object from the grinding wheel to regulate the axial movement of the workpiece.

Centerless grinding, which is a form of infeed grinding, offers advantages when it comes to combining with automatic loading procedures compared to OD grinding. The absence of collets or centers simplifies the loading process, making it easier to automate and achieve higher production efficiency.

Centerless grinding provides a reliable and efficient method for achieving precise grinding results, particularly for cylindrical workpieces without the need for additional support mechanisms.

| Through Feed Grinding

Through-feed grinding is a grinding process primarily used for applications where only the largest outside diameter of a workpiece needs to be ground. In this process, the regulating wheel is held at a slight angle to the part, creating a force that feeds the workpiece through the grinder.

Centerless grinding, which encompasses through-feed grinding, offers several advantages over centered grinding when it comes to integration with automatic loading equipment. The absence of centers simplifies the loading process, making it easier and more efficient to automate. Centerless grinding provides a reliable and productive method for achieving precise grinding results, particularly for cylindrical workpieces. It is widely used in various industries, including automotive, aerospace, and manufacturing, for efficient and automated grinding operations.