Drilling machine NS-12: Specifications
Drilling machine NS-12, the design of which was developed by engineers of the Special Design Bureau №3 in Odessa, produced in the 1950-1970's. several enterprises of the USSR, near craft and technical schools. Along with the NS-12 model, a number of its modified versions were produced (NS-12A, NS-12B, NS-12M), the device and complete set of which slightly differed from the basic equipment.
Appearance of the NS-12 drill
The purpose of the machine model NS-12
The NS-12 drilling machine belongs to the category of desktop equipment. That says it all, that it is suitable for processing small parts. Appropriate dimensions and low productivity of the machine make it possible to use it in repair shops of industrial enterprises and small workshops, specialized classes of technical and secondary schools. You can often find such a device in the equipment of home workshops.
Long service life, ease of use, maintenance and repair of the machine NS-12 are provided by simplicity of its design. When drilling blind holes on such a machine, their depth can be adjusted on a flat scale or a special stop.
Technical parameters of the NS-12 drill of various modifications
The use of a multi-stage belt drive in the drilling machine allows to obtain five different speeds of rotation of the spindle assembly. What is important, the belt is rearranged on a pulley of other diameter simply and quickly thanks to the special mechanism of a tension of belts.
Technical possibilities of the drilling machine of the NS-12 model allow to carry out various types of processing of preparations from pig-iron, steel, non-ferrous metals and non-metallic materials:
- drilling and reaming holes;
- deployment;
- countersinking;
- internal thread cutting.
Overall dimensions and seats (click to enlarge)
Elements of equipment design
The design of the drill NS-12 includes the following elements:
- base plate;
- column;
- the hobby, on which the spindle group of the equipment is mounted;
- electrical equipment.
The location of the components of the machine
Column, which is installed on the base plate, fastens on it by means of a special shoe. Along the perimeter of the base plate is a special gutter for collecting coolant. The liquid drains from the gutter through the lower hole, which is closed by a threaded plug. In that case, if the coolant is supplied from a centralized network, the nipple is screwed into the drain hole, to which a rubber hose is connected.
The inner part of the solid base plate is used to accommodate the step-down transformer and the package switch housing, which is responsible for illuminating the treatment area. A push-button station is mounted on the front of the hob, by means of which the main electric motor of the machine is included.
Desktop and column for the NS-12 machine
Vertical movement of a trunk on a column is carried out at the expense of rail transfer, consisting of a rail, fixed to the column, and gears, mounted in the trunk. Control this movement with the handle, rigidly connected to the gear. There is another handle among the controls of the drilling machine, by means of which the trunk is fixed at the required height.
The spindle assembly is mounted on the trunk, also here there is a plate with the electric motor fixed on it and the mechanism for a tension of drive belts. The spindle itself is installed in the sleeve (quills) the machine, which can move in the vertical direction.
Spindle assembly of the machine
Control of movement of a sleeve, that informs the spindle feed movement, is carried out by means of the handle, located on the side of the trunk. Smooth and precise rotation of the spindle is ensured by installing it in the support with precision deep groove ball bearings. Drill spindle pulley, which is a five-stage structure, also mounted on two bearings with radial bearings.
Scheme of the spindle unit device
The electric motor of the machine is mounted on a special plate and can move on its guides. This design provides rapid loosening of the drive belt at that time, when it needs to be transferred to another pulley, as well as its rapid tension, when it is necessary to start processing.
How the kinematic scheme of the machine works
The electric motor of the drill rotates a five-stage pulley, fixed on its shaft, torque from which by means of a V-belt is transferred to the pulley of the spindle assembly. Vertical movement of the sleeve and, in accordance, spindle assembly is carried out due to the fixed on it rails and gears, which is rigidly connected to the corresponding control handle.
Kinematic scheme of the HC12 drill
The trunk of the NS-12 drill moves in the vertical direction also due to the rail transmission, the action of which was described above. In the shoe, mounted on a plate-base, there is a special clamp, after weakening which it is possible to turn a column together with a trunk around the axis.
Drawing of pulleys for the NS-12 machine (click to enlarge)
To ensure the safety of the operator, a cast or elongated welded cover is mounted on the belt drive of the drill.
Including the electrical circuit of the device
This is the characteristic of the machine of this model, as ease of use and repair, determined including the simplicity of the electrical circuit. Elements of the electrical circuit of the drill NS-12, responsible for equipment management, there is a "Start" button, when pressed, the drive motor is started, and the "Stop" button, by means of which the electric motor is disconnected.
The characteristics of the drill include the presence of local lighting, which is included when turning the knob of the corresponding batch switch. The operation of a local lighting system requires the use of a step-down transformer, which is mounted in the immediate vicinity of the machine.
Scheme electric machine NS-12A (left) and the machine NS-12B (right) (click to enlarge)
Carrying out installation of the NS-12 machine after its acquisition or repair, be sure to take care of grounding, which will make the operation of the device safe and eliminate the risk of breakage due to short circuit.
The place of installation of a drill of this model taking into account its small dimensions are mainly tables or machines. At the same time, they must be quite reliable, to ensure high stability of the machine in the process of technological operations.
