A double-sided grinder is an efficient grinding machine consisting of two rotating faces that rotate each clockwise. Typically the first rotating face is also known as a stationary face. The other rotating face consists of an additional auger accessory for milling or chiselling attachments, and a grip extending abovehand to enable gripping the work piece. In addition to the rotational movement, a two sided grinding machine will generally include a radial motor or a pneumatic power drive system. Grinding wheels are usually made from alloy steel and have a wide bearing area.
With the use of a pneumatic power driven system a two sided grinder can move at much faster speeds than a similar sized machine without this additional feature. It is possible to use a pneumatic driven system in a double-sided grinder if desired. There is typically only one drive unit in this type of grinder, although multiple drive units can be fitted if needed. In addition, the size and torque ratings of these types of grinders are very different than those of the chuck and the lathe. The grinding head on such a grinder can provide a certain level of precision and accuracy that is difficult to achieve with other types of machines.
Some single-sided grinders are also available with a two-sided blade option. This is commonly found on table models which may not feature a dedicated grinding surface. Commonly the two blades are aligned along the same plane but with a slightly tilted rotation about the axis of the unit. This type of configuration produces a grinding result that is somewhat less precise than that obtained with a double-sided grinder, however the accuracy of this type of grinding is still typically more than adequate for most individual applications.
When purchasing a two-sided or two-blade grinders, it is important to consider exactly what the job will require from the grinder. A two-sided grinder generally provides faster and more accurate results than single blade grinding. Grinding of any sort should always be performed with a bit of give, both when using a burr and when making use of a standard orbital grinder. Any surface that is to give will contribute to poor results and produce a rounded or “wavy” result during the grinding process. Any physical limitation such as height or wire length will also have an affect on the type of grinding machine that is best suited to the project. There are also some limitations related to wire diameter that will need to be considered when making a decision.
Picking the right model may also come down to the type of material being worked with. Two-sided grinders are able to grind heavier and larger materials than single blade units can. Many two-sided grinders come equipped with optional attachments that allow for even greater workpieces tolerance and size. Grinding wheels are also available which allow the user to quickly change grind areas while not in use. Although larger workpieces do not generally lend themselves well to standard blade models, two-sided grinders are often able to make a complete work of larger alloy wheels.
If there are only a small number of workpieces to be grinded, a single-sided grinding machine may be the best choice. These units are able to grind to precision within a very short time, but they are typically not designed for use with a wide variety of material. They are also not designed to grind in a consistent fashion. Regardless of which type of grinder will best suit your particular project needs, there is likely a two-sided or single-sided grinder that will be suitable for the job.