CNC internal grinders, also known as flex grinders, are a class of precision grinding machine which utilizes an abrasive ball-bearing wheel for ensuring high-quality, low-cost, precision finishes. The most popular kinds of CNC internal grinders available in the market are the cylindrical, table, and handheld varieties. CNC internal grinder functions by automatically positioning and re-centering the grinding tool at the exact location. They eliminate the user’s effort in setting up and maintaining the machine.
The basic model of a CNC internal grinder includes a table top with five or six wheels positioned parallel to each other. The top of the table is typically covered with a heat-resistant fabric to protect the machine components from overheating. The working surface of the CNC internal grinder consists of a large machining table with a workhead spindle at one end. The workhead spindle is used to position and spin the abrasive material at the high velocity of the grinding wheel. Spindle extensions are also available to extend the operating depth of the machine.
Although CNC internal grinders have many similarities with their counterparts, they function differently. A CNC grinder generally has its own workhead spindle and is enclosed in a metal case. It has a smaller range of movements compared to a bench top grinding machine. A CNC internal grinder can be set to a variable precision or in some cases can be manually set.
The main difference between an internal grinder and a bench-top CNC machine is that the internal model has its own grinding wheel and the material is fed into the machine in a similar manner to a traditional lathe. The main difference between the two types of CNC machines is that the CNC internal model does not use a cam mechanism to operate on the x or y axis. Another important difference is that an internal CNC machine can program the cutting distances much larger than those of a stand alone machine. It is also capable of fine tuning the center alignment and program the milling steps to bring out the best possible result.
There are two major types of CNC machines: the ones that are CNC with a moveable worked and the ones that are CNC with a stationary workload. The CNC internal grinding machines are powered by hand power or may even run off of a small electrical motor. They are typically much more expensive than the stand alone versions and are much faster. The main advantage of CNC internal grinding machines is that the user is able to fine tune the machine to get the exact result they are looking for. This also eliminates some of the human error associated with CNC bench top machinery.
The CNC bench top machine can perform both grinding and polishing operations. The CNC bench top CNC machine has a grinding wheel which rotates at a predetermined speed. A CNC bench top internal Grinder machine is programmed with a program to either grind or polish. When the work piece is inserted into the CNC machine’s grinding spindle, the grinding spindle raises and grips the work piece, gripping it in place and then the grinding wheel revolves. This creates a surface that is perfectly machined to the particular specifications of the user.