The Heart of Machine Tools: Machine Tool Spindles.

Posted on Dec 27, 2018

Machine Tool Spindles.

The machine tool spindle is one of the most important components in machinery, and its status is as crucial as the five cast bases and shells. Among all the machining spindles, the belt driven spindle is the most widely used and developed.

Heart Of A Machine Tools: Machine Tool Spindles.

The machine tool spindle is one of the most important components in machinery, and its existence is as important as the five cast bases and shells. Among all the machining spindles, the belt driven spindle is the most widely used and developed. The spindle is one of the most important rotational mechanical parts, used to hold and drive the work piece on the lathe machine. The driving force of the machine spindle varies with different structural designs. Most turning spindles are belt driven, while others are motorized, and various structures can be customized according to processing requirements.

Read More: How Spindles Determines Your Machining Quality


Spindle driving

The machine tool spindle is driven in various ways. Due to different processing requirements, the effects of various driving methods are also different. The machine tool spindle can be installed in a solid housing, or it can be fixed on the machine with a flange. Most machine tool spindles used for cutting are designed with tapers. Sometimes, a machine tool uses multiple spindles to speed up the processing and perform repeated precision machining, such as precision center hole machining. In response to the trend of intelligent production, the built-in spindle is becoming more and more popular in the market.


Practical usages

In addition to the motorized spindle (built-in spindle), the spindle driven method also includes belt driven, direct driven and gear driven. Although there are different types of spindle drive mechanisms, the performance differences between the different types are not obvious. Early lathes mainly used belt driven spindles, because the spindle design was simple and there were not many options on the market. Belt driven spindles have many excellent characteristics and are easy to maintain.


Spindles for mill-turn machines

Turn milling machine tool manufacturers have more spindle types to choose from, and belt driven spindles are still one of the most popular. Motorized spindles are also popular to be used in lathe machine with high precision, such as turning centers with power turrets and some turning and milling centers with multiple spindles on the front and back. Motorized spindles have many convenient advantages, such as high torque, no tooth loss issues, and better stability. There is no distinction between the types of spindles, but the most appropriate solution must be selected according to the application and the machining process.


Machine tool housing of the spindles

In order to correctly install the spindle on the machine tool, the housing used to fix the spindle is very important. Whether it is belt driven, direct driven, gear driven or motorized spindle, spindle housing may be required. The design of the spindle housing not only needs to consider its functionality, but also cost factors. Buyers need to consider the overall budget of the spindle unit to make a choice. The arrangement of the spindles of vertical lathes and horizontal lathes is basically the same, but there are subtle differences.


Machine tool arrangement of processing direction

There are many types of lathes extending from horizontal lathes, but they can be divided into two basic types. Vertical lathes, also known as vertical turning machines, are machine tools that rotate the work piece on a rotating axis to perform various machining operations, such as cutting, knurling, grinding, drilling, deforming, end surface machining, and turning. This type of machining is through turning work pieces, and made to create objects symmetrical to the axis driven by the spindle.

Under normal circumstances, lathes are divided into two types according to the way of clamping work pieces or tools, namely vertical lathes and horizontal lathes. These two have included 99% of the total number of lathe machines. In a vertical lathe, the work piece is clamped vertically, and the cutting tool is installed in the same direction. In such a structure, the processing is performed vertically. Compared with horizontal lathes, vertical clamping can be more robust due to the gravity effect. Vertical lathes can usually be extended to a variety of high performance processing equipment for users in various industrial fields pursuing high precision, such as automobiles, aerospace, sports facilities, and other industries requiring large-sized work pieces machining.


Corresponding mechanism for machine tool spindle

The mechanical design of the vertical clamping and the spindle are also located behind the chuck, some may be belt driven, some may be direct driven or gear driven. Like milling machines and machining centers, lathes can also be equipped with power tools and two tool magazines to improve their functionality and machining performance.


Heart of a machine tool

The lathe spindle is the heart of the lathe. However, a body not only has a heart, but also other parts. The power turret is like a hand that can complete many complex tasks. This is a modern standard accessory for many CNC lathe machines, and it can also be said to be one of the most powerful accessories. Taiwan has many well-known manufacturers of power turrets and power tools that support the high-end needs of lathe users on the global market. These manufacturers are aware of the intelligent trends in manufacturing, thereby providing users with a more convenient production model.


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