Centerless grinders are one of the most modern kinds of grinders. They are a derivative of the belt grinders that use belts with teeth to grind particles. The main difference is that the inner surface of these machines is flat, smooth and polished, while the belt surfaces are grooved and textured. The term ‘centerless’ refers to the fact that there is no part of the machine above or below the work surface. They are ideal for use in applications where the operation of grinding or polishing delicate materials would be affected by heat damage or moisture.
In addition to being used as grinders, they can also be used for drilling, sawing, routing and boring. There are two types of centerless grinders available in the market – those with front-end and those without. The first type has a fixed front working surface; the other type has a movable work surface attached to a fixed center. Through-feed grinding wheels are used in most of the former machines. They are made up of a cone-shaped housing that has one or more spinning wheels.
Unlike the in-feed grinding machine, the front-end centerless grinder does not spin as the grinding wheel rotates inside the machine. Instead, the operation is done by pushing the riding surface against the stationary wheel and engaging it at a single point. This design makes the device very economical and convenient to use. The device needs little operator training since it is controlled by simply pushing a button or knob.
These types of machines are often used in apparel and fashion design. In addition to having excellent grain finishing capabilities, centerless grinders also have a high tolerance for wear. They are perfect for cutting fabric and other workpieces to the desired degree of wear. Since they have virtually no moving parts, they can be left unattended and worked with for hours on end without any risk of mechanical breakdowns.
Cylindrically shaped, the rearward-facing workers of the centerless grinder has a two-piece seat and a pair of sliding cutting wheels at the far end of the seat. The two curved cutting wheels have a locking feature wherein they can’t turn unless they are pushed into the correct position. The seat of the workers has a handlebar that controls the sliding cutting wheels. The frame of the machine has a non-slip rubberized deck for safety and comfort. The deck can also be imprinted with different patterns and designs through the use of fiberglass, vinyl or acrylic cloth materials.
A major advantage of the non-round components of this type of machine is that their size is very small compared to those of round parts. Because of their tiny sizes, they can fit inside tight corners and can be used in areas that would not be feasible for other types of workpieces. Centerless grinder wheels are also lightweight, and most machines are only about five centimeters in diameter. All the working parts are sealed inside a precision-cut carbon fiber sleeve so that they won’t rust or warp even if they are exposed to extreme conditions such as high temperatures. As the parts are sealed inside, they also contribute to the high level of precision and accuracy of the grinding operation.