Milling Spindles, as the primary spindle of all tool machines, play an important role in machine cutting. Various machine interfaces are used in conjunction with the grinding tool, including, for example, the aforementioned SK or HSK.
Milling tools are normally made from steel, cast iron, or titanium. The spindle or housing is attached to a base or bearing. In a lathe machine, it is mounted on the bottom surface of a drum or a table, which is then screwed into the top surface of the drum. The top surface is usually made of iron or other heavy-duty metal. This metal is then spun by a motor to move the grinding tool to and fro in a circular motion.
While some milled tools have been manually turned manually, most are now automatic, using a rotary milling spindle. The rotating action moves the grindstone over the surface and causes the tool to grind against it. There is also the option of a counter clockwise rotation that produces a finer finish.
When a machine is designed, the design of its mechanical interface must be taken into consideration. Most lathes have three basic models: the single-step milling lathe, the multi-step lathe, and the rotating drill lathe. The single-step lathe uses a single rotating wheel to rotate the grinding tool over the surface. Multi-step lathes have multiple rotating wheels that each rotate a different part of the grinding tool. A rotating drill lathe consists of a rotating drum and a fixed gear mechanism.
Milling spindles also may be designed to meet specific industrial needs. If a milling machine is to be used in an aircraft manufacturing plant, there will be a need for a drill spindle that is able to withstand high pressure air compressors. This type of gear drive is referred to as “hot gear”. In a fabricating industry, there will be a need for a spindle with very low torque that can handle rapid speeds and higher torque levels.
There are many different types of milling spindles on the market, with various types of gears and ball bearings that can be used in their construction. Some of the popular types are: HSK (which are the most popular because of its fine tooth profile), SK (which has a slightly larger profile, and is ideal for grinding delicate work surfaces), and SKX (which are for high-end machines that have high torque. Also, the spindle that will be used in a lathe machine will have to be capable of bearing with different sizes and thicknesses of metal. In general, the more complex a spindle is, the higher the torque.