Universal dividing head (UDG): setting and price. Do-it-yourself dividing head for a milling machine
Universal dividing head (UDG): setting and price. Do-it-yourself dividing head for a milling machine

Dividing head of universal type (UDG) is used for processing metal blanks on a milling machine. This element allows you to carry out several types of operations for finishing products, taking into account the peculiarities of their configuration, and is used for the production of complex parts. As a rule, the equipment is equipped with this device as standard. Otherwise, you will need to select the correct model according to the characteristics of the existing turning fixture.

dividing head


The dividing head allows you to transform the workpiece into the desired configuration by shifting the part relative to the axis of the machine equipment.

UDG is fixed on the frame of the unit by various types of fasteners, depending on the type of nozzle. The working position is adjusted with the help of movable handles and a disk, which is equipped with holes for fixing the dividing unit.

Features of the instrument in question:

  • Milling surface grooves. This process does not require perfect precision,taking into account the correct control of the depth and width of the workpiece.
  • The ability to create faces on parts. This operation is expedient in the manufacture of nuts with non-standard parameters, as well as working tools and workpiece shanks. Such manipulations require high precision.
  • Carrying out milling work on the processing of grooves and slots. In this case, significant movement of the workpiece may be required.
do-it-yourself dividing head


Universal dividing head is used to increase the speed of work. However, it should not be subject to constant reinstallation. Changing the position in relation to the cutter is performed by placing the device in the desired position. Particular attention should be paid to this process when forming screw-type grooves. Their manufacture is possible only with the use of high-precision modification of the assembly.

Before buying a dividing head, be sure to check its compatibility with your existing machine. Any do-it-yourself modifications to the design and unprofessional alterations may adversely affect the final quality of the product.

Specific properties

Taking into account the specifics of the tool in question, you should choose a dividing head for a particular milling machine. Elements are divided into several types and types, differing in the method of installation, size, principle of operation and technical parameters.

universal dividing head

Specialattention is paid to the accuracy of the implementation of the work carried out. In addition, the complexity and accuracy of setting the parameters of equipment for operation are taken into account. This approach allows you to choose a modification with high accuracy and permissible errors. With certain skills and the right tools, UDG can be done on your own.


Dividing heads for milling machines are classified as follows:

  • Simple model. It is lightweight and easy to handle. The main part is the spindle, which fixes the workpiece and is connected to the disk limb. This element has several holes that allow you to shift the workpiece relative to the milling axis.
  • Combined options. The devices are adjustable with a handle. With a larger number of clicks, the distance of the center axis of the workpiece from the cutter increases.
  • Universal samples are complex equipment that requires adjustment through the participation of a disk element and a handle. The process is carried out with the participation of differential gears.


Deciphering the marking of the dividing head will determine the model and the possibilities of its use. Using the example of modification UDG-40-D250, consider the designations:

  • UDG - universal dividing head.
  • 40 - gear ratio indicating the number of revolutions of the spindle handle when turning 360 degrees.
  • D250 - the maximum allowable dimensions of the workpiece.

Samples of the UDG category more oftenmost commonly used to form edges and surfaces of increased complexity.

setting of dividing heads

Setting dividing heads

Possible tool transitions depend on the type of device and its technical parameters. The processing accuracy is determined by the divisions of the available scale, the indicators of which correspond to the 7th (GOST-1.758) or 9th (GOST-1.643) calibration level.

The main tuning process is to determine the dimensions of the sector of the dividing circle. In addition, the diameter of the circle and the number of compartments into which it is divided are taken into account.

The element setup process consists of the following steps:

  • Transform 360 degrees full diameter into required number of sector divisions.
  • Determine the sine of the resulting calculated angle.
  • The device disk is set according to this indicator.
  • The body of the block is fixed with a handle or a clamping mechanism, after which the working part of the tool is mounted.

The formula for calculating the required angle can be found in the user manual for the UDG. The workpiece to be processed is fixed on the mandrel of the machine, the longitudinal displacement of the table is performed, and the finishing is carried out. The feed step is affected by the type of processing. To increase productivity, after the completion of the next work cycle, use the accelerated return of the table to its original position. The elements are fixed in the measuring holes of the disk by means of springs.

DIY dividing head

high cost. In this regard, the dividing head for simple operations can be made independently. You will need a set of the following components:

  • A worm-type gearbox that can be picked up from the equipment of old machines or machined with your own hands.
  • Diameter lathe chuck (suitable size is 65mm in diameter).
  • Restriction screw.
dividing heads for milling machines

Before the production process, the dividing part must be adjusted. Any standard part or a turned figure of a certain format will help with this. After a comparative test with an analogue, an additional calibration of the instrumentation is carried out. The cost of a do-it-yourself dividing head will be an order of magnitude lower than the factory counterpart, the price of which starts at 40-50 thousand rubles.

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