The machine building industry manufactures equipment that allows threading on fasteners, making all kinds of threaded tools (taps, rolling rollers, calibers, thread cutters, long lead screws, precise micrometric screws, etc.).

To obtain a thread of high accuracy, our company has developed a semi-automatic thread grinding machine with numerical control model VZ-681F4. The thread grinding machine is used for round external grinding of threads (grinding external screw surfaces). Grinding is performed by a single-grinding grinding wheel with coolant, the correction of which is carried out by a diamond roller installed on the back of the headstock.

A grinding wheel with a built-in electric motor is mounted on the rotary plate of the reducer. For the installation of mandrels with grinding wheels, the motor has a spindle with an outer cone. The orientation device is placed on the grinding head shell.

The CNC machine VZ-681F4 makes grinding in a semi-automatic cycle, where the installation and removal of the workpiece is done manually. All semiautomatic assembly units are separate units, facilitating delivery, assembly and disassembly during repair.

The SINUMERIK 840DSL CNC machine is mounted on the machine allowing:

  • process a large number of calculations;
  • control any motion of the drives using interpolation;
  • ensure reliable and trouble-free operation.

The system memory stores a lot of parameters of the processed products and processing modes. The visualization of the system and diagnostics makes it possible to display messages and parameters on the display in full-screen mode, thanks to which the operator controls the grinding process and the condition of the drives.

Video semiautomatic CNC thread-grinding machine VZ-681F4


Download the technical offer (specimen, PDF)
The parameters marked with (*) are specified at the stage of the technical task coordination.
Product Indicators, machined:
Dimensions of the installed grinding wheel: max. length, mm 400
max. diameter, mm 350
min. diameter, mm 3
max. weight of processed details, kg 50
Size of the blank to be installed length, mm 500
diameter, mm 350
Parameters of working and adjustment travels:
Max. working travels along controlled coordinate axes: longitudinal, mm: 600
transverse, mm: 320
the headstock, deg. : not limited
wheelhead, deg : ±30
Number of controlled axes 4
Performance tool that is installed on the machine:
Dimensions of the installed grinding wheel: max. diameter, mm 400

min. diameter, mm 300

the frequency of rotation of the grinding wheel, min-1 1500...2800
Dimensions of the installed ruling circle, mm max. diameter, mm 125
frequency of rotating diamond roller min-1 1500...3000
Indicators of primary and secondary movements:
Discreteness of travel assignments along coordinate axes linear, mm: 0,0001
circular, deg.: 0,0001
Max. speed of working unit travels longitudinal m/min 10
transverse , m/min 10
headstock, rpm 0…120
wheelhead, rpm 2
Indicators Power of machine:
Power of the main motion motor, kW 10,0
Parameters of accuracy and roughness:
Аccuracy and roughness of samples machining Roughness of the spline machined surface Ra 0,80
Electrical equipment specifications
AC current frequency, Hz 50
Nature of supply AC. 3-phase
Voltage, V 380
Dimensional characteristics:
Dimensions (LxWxH) mm 2450х4500х2650*
Weight, kg 6000*

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Semiautomatic CNC thread-grinding machine VZ-681F4

  • Product Code: VZ-681F4
  • Availability: Pre-Order