Guide Bushing

Guide bushing in the machine tool sector may refer to the spindle guide bushing units that are often packaged with the spindle set. In the mechanical design, a bushing is usually a plain bearing inserted into a housing unit in order to offer bearing surface for rotary usages applications. The design of guide bushing is not delimited to the machine tool spindle usages, but also applied to other industries as well.

Regarding the design of bushing, there are mainly three of them. Those three types of bearing designs can be suitable for different situations and applications. There is no a superior or common application but only appropriate matches.


Solid Design of Guide Bushing

Solid design is also called sleeve and flanged bushings. A sleeve bushing is a sleeve of materials with a certain value of inner diameters, outer diameters, and length values. The distinctive features of the solid bushing design are that a solid sleeved bushing is totally solid all the way down. This is the reason why it is called solid by the industrial insiders. 


Split Design of Guide Bushing

Secondly on the list is the split design of the guide bushing. This design contains a cut along its length and a clenched bearing, which is similar to a split bushing, yet it contains a clinch across the cut connecting to the part units. The split design is split as it contains a cut and a clenched bearing that resemble the split bushing appearance. This design is also commonly used. 


Flange Design of Guide Bushing

Thirdly on the list, the flange design is a sleeve bushing unit that is designed with a flange at one end, which extends in a radial direction towards the outward from the outer diameter. Under usual circumstances, flange designs are utilized to locate the bushing positively as it is mounted, offering a thrust bearing surface functionality. These three designs of the guide bushing are the commonly seen and adopted models in the mechanical world. 


Guide Bushing Designs for Swiss Type Lathes

The adoption of guide bushing in machine tool spindles is very common and one of the cases is the Swiss type lathe machines. A Swiss type lathe can offer extreme accuracy and the accuracy value could be within a few micrometers. Regarding the work piece clamping, Swiss style lathe machines do the clamp of the work pieces with collets guide bushing units. The collet unit is arranged behind the guide bushing unit, still the tools is arranged in front of the guide bushing. Guide bushing holds the stationary on the Axis Z as designed.

During the cutting process, the tooling units move-in in order to cut lengthwise along with the part, while the material moves back and forth along the Axis Z as well. The action allows all the works achieved on the materials near the guide bushing units in which it is more rigid than others. This arrangement makes it possible to work on thin work pieces as the part firmly held with little opportunity of deflection or vibration from happening. 


Multiple Spindles & Guide Bushing

Inside the Swiss lathe machines, there are usually many spindles such as one or two primary spindles plus one or two secondary spindles, which are also called back spindles. Primary spindle is utilized with guide bushing as the operation. Aside from primary spindle, it is the secondary spindle, which is located behind and arranged on the Z axis. A Swiss type lathe is a specific design of lathe providing extreme accuracy and precision standard. A Swiss-style lathe holds the work piece with both a collet and a guide bushing. The collet locates behind the guide bushing, and the tools sit in front of the guide bushing, normally holding stationary on the Z axis.

To cut lengthwise along the part, the tools would move in and the material itself will move back and forth along the Z axis. This design of action allows all the work to be done on the material near the guide bushing where it is more rigid, making them ideal for working on slender work pieces. The use of guide bushing is efficient in the Swiss type lathe machines and the further applications in other machine tool models are also very productive to the onsite workers as well as business owners, making guide bushing equipment one of the most widely accepted equipment.

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