STD-120M wood lathe

STD-120M is a wood lathe designed for processing small-sized elements from different types of wood. The unit has the advantageous features that distinguish it from its predecessor, namely that critical work areas are protected by a fence, equipped with local lighting. In addition, the basic electrical circuit was modernized, a system for reducing vibration and noise levels was provided, and an installation was developed to remove dust and chips by a mechanized method.

Appointment

The school school lathe STD-120M is used for easy processing of wood by central interaction, using the faceplate and chuck, as well as for performing elementary drilling. Its functionality includes the following:

• Sharpening of cylindrical and profile rotating elements.
• The ability to cut, round and cut blanks at different angles.
• Turning on a marked profile.
• Drilling
• Processing of flat diameter surfaces in a decorative and profile plan using a faceplate.

The STD-120M is brought into operation by starting up an electric power plant. The motor is located on the left side of the unit. Torque is transmitted through belt interaction. This process is facilitated by a pair of pulleys: the first is mounted on the motor shaft, the second is mounted on the headstock spindle.

Arrangement

The STD-120M machine has some features of the device, namely:

• The high-speed mode of rotation is converted by throwing the belt to certain grooves of the shafts.
• The control unit with buttons is located on the front headstock, which provides the most convenient access to control in the process.
• Spindle nozzles are subject to change, they are included in the standard equipment.
• The working area is protected by additional curtains with transparent windows.
• Chips and other weeds can be removed using an optionally connected cleaning unit.

To increase the accuracy of operations allows special lighting, the operation of which is controlled by a step-down transformer. The electrical interlock of the belt drive design with switch increases operational safety.

Front headstock

This unit of the turning unit STD-120M is used for mounting and fixing the workpiece with the subsequent transfer of torque to it. This element consists of an open cast cast iron body. It bores along the axes of a pair of holes that serve to accommodate radial, spherical bearings.

The working spindle is a steel shaped shaft with a thread on the right for mounting the cartridge, washer and other special nozzles that fix and process the workpiece. On the left at the end there is a two-stage pulley-type drive activated by a V-belt drive from an electric motor. On both sides of the headstock, hatches with felt padding are equipped. The start and stop of the spindle is carried out using the control unit located on the housing.

Rear element

This part of the STD-120M machine provides support when servicing long products, as well as fixing the cartridge, directly drills and other tools. The rear element of the device consists of a skeleton and pintles sliding along the guide grooves of the housing.

A hole is provided on one side of the movable sleeve, which is adjusted to the cone, where the back stop, chuck or drill with the corresponding limit switch is placed. A sleeve having an internal thread is inserted from the opposite side by pressing. The set screw provides easy movement of the pintles and prevents it from rotating around its own axis.

The torque redistribution element is combined with a threaded sleeve, on one edge of which a flywheel fixed by a nut is installed. Mounting the pins in the required position is carried out by the clamping handle. The tailstock is fixed using a nut, a cracker (washer) and a bolt. To lubricate the working elements in the housing, special holes are provided.

Basic and removable accessories

The woodworking machine STD-120M is equipped with several basic elements, namely:

1. A trident used to secure the workpiece. It has a conical shape at one end that is identical to a spindle. The second edge of the element is made in the form of a fork with three teeth. The workpiece is fixed by placing the intended groove directly in the trident, after which the second end is clamped in the tailstock pins.
2. A cup cartridge, which is a part that has a cylindrical interior on one side and a tapered shank on the other hand, which serves to be installed in the spindle part of the front headstock. The round side of the workpiece is tightly placed in the cartridge cavity or clamped with bolts.
3. If the workpiece has a multifaceted shape, an embossed cartridge is used.
4. In addition, the STD-120M lathe can be equipped with chucks with three or four cams. They serve to secure parts to the outside. Self-centering elements have independent cam movement, which allows to speed up processing and increase its efficiency.
   

Electrical equipment and technical parameters

Regarding the electrical equipment of the turning unit, it can be noted that there is a connection to an AC network with three phases (380 V) with a neutral that is grounded tightly. The distribution cabinet also has a lighting transformer.

Machine specifications are given in the table:

Operational features

The STD-120M wood lathe does not belong to the category of professional equipment, its main purpose is to familiarize students with the basics of the turner. It has increased security measures.

To ensure the stability of the processing tool, it is better to make the base steel or concrete. Its height should be at least 60 centimeters.

In addition, some operational features should be considered:

• The wood blank must be free of cracks and knots.
• The humidity of the part is allowed no higher than 20 percent.
• Large items must be processed at minimum speed.
• At least once a year or after five hundred hours of operation, lubricate moving elements, check the equipment for deformation and malfunctions.

Before performing repair work and servicing the machine, its device should be studied, as well as a detailed familiarization with the operation manual.

Conclusion

The considered turning unit is designed for processing wooden workpieces and drilling holes. Its main purpose is home use, training for beginning specialists and schoolchildren. When operating the equipment, safety precautions must be followed and the recommendations indicated in the instructions should be followed.