Used universal, cylindrical and surface grinding machines.

Looking for used grinders of universal, internal, external, cylindrical or centre less type? Here at Machine Tools Online we have a good selection of pre-owned grinding machines with various accessories such as magnetic chucks and rotary tables for you to choose from. Our used grinders are available to clients in South Africa, Botswana, Namibia, Zimbabwe, Mozambique and Zambia.

What is a universal, cylindrical or surface grinder?

Cylindrical grinder

The cylindrical grinder is a type of grinding machine used to shape the outside of an object. The cylindrical grinder can work on a variety of shapes, however the object must have a central axis of rotation. This includes but is not limited to such shapes as a cylinder, an ellipse, a cam, or a crankshaft.

Cylindrical grinding has four essential actions:

The work (object) must be constantly rotating
The grinding wheel must be constantly rotating
The grinding wheel is fed towards and away from the work
Either the work or the grinding wheel is traversed with respect to the other.

While the majority of cylindrical grinders employ all four movements, there are grinders that only employ three of the four actions

Surface grinder

Surface grinding is used to produce a smooth finish on flat surfaces. It is a widely used abrasive machining process in which a spinning wheel covered in rough particles (grinding wheel) cuts chips of metallic or nonmetallic substance from a workpiece, making a face of it flat or smooth.

The surface grinder is composed of an abrasive wheel, a workholding device known as a chuck, and a reciprocating or rotary table. The chuck holds the material in place while it is being worked on. It can do this one of two ways: ferromagnetic pieces are held in place by a magnetic chuck, while non-ferromagnetic and nonmetallic pieces are held in place by vacuum or mechanical means. A machine vise (made from ferromagnetic steel or cast iron) placed on the magnetic chuck can be used to hold non-ferromagnetic workpieces if only a magnetic chuck is available.

All of our used machine tools are:

  • Multi-point checked by our fitters and electricians
  • Quality checked and/or refurbished and painted
  • Supplied with a 3 month guarantee (where applicable)
  • Can be supplied at your request with new wear and tear parts such as blades, vee dies and other tooling.