Sahand Isfahan helical gearbox

Sahand Gearbox Isfahan (Sahand Dor) is a company that produces all kinds of industrial gearboxes. The flagship product of this company is Sahand helical gearboxes, which are used in elevators, mixers, conveyors and many other devices and industries. This company started its activity in 1362 in Isfahan.

In this industrial unit, different gearboxes with different power and dimensions are produced, and for this purpose, expert groups are working in this company in the fields of design and production, management, implementation of various projects, etc. In this factory, all types of straight shaft helical gearboxes , helical bevel, spheroidal, hypoid and helical gearboxes are produced; Stay with us in this article to get to know the types of Sahand gearboxes and their specifications.

Helical, NMRV or cubic gearbox

First, it is necessary to get acquainted with this device briefly; The helical gearbox has two gears that are made of phosphor bronze or brass, and usually their inner hub is made of cast iron. It should be noted that there is a 90 degree angle between the input and output axis in this type of gearbox.

One of the important features of this device is that the teeth do not lock together when the temperature rises; Another feature of these gearboxes is the production of the greatest reduction in speed in the smallest possible dimensions. You should know that the price of this device is cheaper than similar items with the same applications.

Specifications of Sahand Isfahan helical gearbox

In the Sahand helical gearbox, two main Mardon gears made of steel are used along with a plate gear made of brass, although these brass gears need to be replaced after a while. One of the special features of this device is that it is not reversible, that is, by rotating the output part, the input gear will remain fixed. You should also know that in this type of gearbox, there is a low input power and conversion ratio.

Types of Sahand spiral gearbox

This equipment is produced in different dimensions and types, which we will try to introduce you to below:

Sahand spiral gears W series

Sahand’s W series helical gearbox is one of the most widely used types of helical gearbox, which has increased in use and need for this type of helical gearbox due to its compatibility with space limitations and also the ability to transmit high power. These types of gearboxes are similar to spiral book gearboxes with a cube-shaped appearance, with the difference that the body of these gearboxes is made of aluminum, and this issue causes better heat transfer and higher power efficiency than the U series. These gearboxes are produced in 7 different sizes and ratios.

The application of this series of Sahand helical gearboxes is in various industries such as food industries, wood and paper industries, agricultural industries and packaging machines, elevators, mixers and many other cases.

Advantages and disadvantages of the technical specifications of the torque range

Advantages :

• Affordable
• low noise
• Very high capacity
• Minimum installation space
• High reliability
• Long life
• Various fraud cases
• Wide range of output speed selection
• Wide range of output torque selection

Disadvantages :

• Unable to use at 1500rpm
• High working temperature (due to gear engagement mechanism)
• Relatively low efficiency (up to 65%)

• Number of sizes (types): 7 sizes
• Output torque range: 24…1500 Nm
• Conversion ratio: 7…100
• Power range: 0.12…15 kw

Installation / assembly (entry) :

• Input with solid shaft
• Input with e-motor coupling

Output :

• HOLLOW SHAFT

Specially (customized) :

• OUTPUT SHAFT
• OUTPUT SHAFT ON BOTH SIDE

Maximum torque	Gearbox size
24 N.M	W 30
50 N.M	W 40
90 N.M	W 50
190 N.M	W 63
440 N.M	W 90
830 N.M	W 110
1500 N.M	W 130

VF Sahand Dur helical gearbox

This type of helical gearbox is one of the most widely used types, which has high sales, and the most important reason for that is its ability to be installed in various conditions and situations. This model is produced with various conversion ratios from 7 to 100. This series has a body made of cast iron and brass ribs, which are made using the best alloy and modern equipment.

The distinctive feature of this series of gearboxes is the lack of reversibility in ratios above 40 and ease of maintenance and repairs. Another feature of them is the ability to be used in limited spaces and also where the two input and output axes cannot be aligned for any reason.

Helical gearboxes can be installed in 6 different modes and combined with each other.

You should know that Sahand Isfahan’s VF series helical gearbox is a flanged and haloshaft model that will be directly coupled to the electric motor. The advantages of this model include easy maintenance and service, possibility of installation in different modes, replaceability of all parts, quietness, smooth operation and cost-effectiveness.

MVF Sahand Dur Helical Gearbox

This series of Sahand helical gearboxes has helical gears and by using the input flange, it couples the electric motor directly on the gearbox. You should know that this model is not different from the VF series in terms of conversion ratio and conversion specifications.

Application of VF and MVF series gearboxes in various industries such as construction machinery and elevators, blowers and ventilators, diesel generators, material transfer systems, mines and well drilling, conveyors, conveyors, compressors, lathes, bakeries, mills, mixers, stone, tile and ceramic industries, packaging industries, food industries and many other cases.

SN series helical gearbox

The shell of this model is made of aluminum and is produced in a conversion ratio of 1 to 7; This is a very special series that is used in special industries and will be made of steel and cast iron upon request.

Features of Sahand Isfahan helical gearbox

In the construction of this device, the highest quality alloys are used, and it also has a wide variety of models and services; These devices work very smoothly and in addition to the high quality of construction, they can be installed in all kinds of situations and have great flexibility. The ability to be used in different situations is one of the important features of Sahand helical gearboxes, which are usually used in mixers, elevators, conveyors, shredders, furnaces, ventilators, concrete mixers, bakery machines, etc.

The shell of this device is made of steel or cast iron, its axis is steel, and the gears are usually brass or phosphor bronze. The torque power of this gearbox is 7100 Nm and its conversion ratio is between 1:5 and 1:288.

Application of Sahand helical gearbox

As mentioned earlier, the helical gearbox is one of the most widely used types of industrial gearbox, which is used in many small and large industrial and agricultural machines and devices. Among these applications, the following can be mentioned:

• Helical gearbox for lift and elevator
• gearbox Conveyor and conveyor spiral
• Helical gearbox of crusher and mill
• Concrete mixer spiral gearbox
• Helical gearbox of filling machine
• Spiral gearbox for packaging industries
• Bakery machine gearbox

The method of installing a helical gearbox

Note that if the gearbox was in the b3 position during installation, it will be easily lubricated, and otherwise, it must be placed in the correct position for proper lubrication. It is necessary to know that some gearboxes do not have oil drain screws, air vents and oil level caps and must be greased constantly.

Those gearboxes that need oil for smooth operation have an oil cap, drain screw, and air vent that are placed on them according to the installation position, and they must be filled with the necessary amount of oil before installation.

Important points when installing Sahand helical gearbox

There are some important points that must be observed when installing the Sahand helical gearbox, you will learn about these items below:

1. Before starting the gearbox, you must make sure the correct amount of oil, this amount must be compatible with the type of load used.
2. For start-up, after 500 or 1000 working hours, the oil must be drained and flushed inside the gearbox; Note that it is better to check the oil level every few days and change it after every 4000 hours.
3. To prevent the Sahand worm gearbox from vibrating, it must be securely bolted to a suitable base.
4. Pay attention that the machining tolerance of gears, pulleys or rangiri that are placed on the input axis must be in h6 or h7 mode.
5. Another important tip is that if you want to paint the transmission, make sure you cover the bowls with felt so they don’t get damaged.
6. When starting the Sahand helical gearbox, increase the power gradually and use 50 to 70% power in the first hours of operation.