A-1180/ST STOMIL 13x8x1180 - Classical V-Belt

A-1180/ST STOMIL 13x8x1180 mm - Classical V-Belt for Industrial Power Transmission

A-1180/ST STOMIL is a classical V-belt with an A profile (13x8 mm) and a pitch length of 1180 mm, designed to transmit power and torque in belt drive systems used in industrial machinery, agricultural equipment and mechanical devices. The belt has a nominal top width of 13 mm, a height of 8 mm, an inside length of 1150 mm and an outside length of approximately 1200 mm.

The STOMIL V-belt operates with pulleys featuring the appropriate groove profile. Power is transmitted through friction between the belt's side surfaces and the pulley grooves. When correctly selected and tensioned, the belt provides reliable power transmission between rotating shafts while limiting excessive slippage and supporting stable drive operation.

Technical Specifications - A-1180/ST STOMIL

The dimensions correspond to a classical STOMIL A 1180 V-belt. The exact material composition, operating temperature range and special properties should be confirmed for the supplied A-1180/ST version.

What Does A-1180/ST STOMIL Mean?

A - Classical V-Belt Profile

The letter A identifies a classical V-belt profile with a nominal cross-section of 13x8 mm.

This is a commonly used belt profile in industrial power transmission systems.

1180 - Pitch Length

The number 1180 identifies the belt pitch length of 1180 mm.

It does not represent the inside or outside length.

ST - Product Version Designation

The ST suffix appears in the commercial designation A-1180/ST.

This suffix alone should not be used to assume a particular reinforcement type, tensile cord material or special rubber compound without manufacturer confirmation.

STOMIL - Brand

STOMIL is a brand associated with rubber products, including V-belts used in mechanical power transmission.

Dimensions of the A 1180 V-Belt

Why Does a V-Belt Have Three Different Lengths?

V-belts are commonly described using three different length measurements.

Li - Inside Length

The length measured along the inner circumference of the belt.

For A-1180/ST, the inside length is 1150 mm.

Lp - Pitch Length

The reference length used for belt identification and selection.

For this product, the pitch length is 1180 mm.

La - Outside Length

The length measured around the outer circumference of the belt.

For a classical A-profile belt with a pitch length of 1180 mm, the outside length is approximately 1200 mm.

When selecting a replacement, always compare lengths measured using the same reference system.

How Does a Classical V-Belt Work?

A V-belt transmits torque between pulleys through friction generated along the sides of its trapezoidal cross-section.

During operation, the belt runs in specially shaped pulley grooves.

The wedge geometry improves contact between the belt and the pulley, allowing efficient transmission of mechanical power.

Key characteristics include:

• Power transmission between separated shafts.

• Flexible connection between drive components.

• Compatibility with single-belt and multiple-belt drive arrangements.

• Partial isolation of mechanical vibration.

• Relatively straightforward replacement during maintenance.

• Adjustable transmission ratio through pulley diameter selection.

A V-belt is not a synchronous transmission element. Some slip may occur during operation, depending on load, belt tension and pulley condition.

Construction of the STOMIL V-Belt

Classical V-belts are generally manufactured from several functional layers.

Tensile Reinforcement

The tensile element carries the circumferential forces generated during power transmission.

Classical V-belts commonly use textile reinforcement, including polyester cords.

Elastomeric Body

The elastomeric body provides the required belt profile, flexibility and ability to operate within pulley grooves.

Outer Surface

Wrapped belt designs incorporate a protective fabric layer that helps reduce surface wear.

The exact rubber compound, cord material and surface construction must be confirmed for the specific production version.

Which Pulleys Are Compatible with A-1180/ST?

The belt is intended for pulleys designed for the classical A profile.

Before installation, verify:

• Pulley groove profile.

• Pulley diameter.

• Shaft center distance.

• Required belt length.

• Number of belts in the drive.

• Transmitted power.

• Rotational speed.

• Operating load conditions.

A belt fitting into a pulley groove does not automatically mean that the drive has been correctly designed or matched.

A-1180 Compared with Other A-Profile Belt Lengths

All listed belts have the same nominal cross-section but different lengths.

An A-1180 belt should not be replaced with a longer or shorter belt simply because the width is identical.

Changing the length may place the tensioning system outside its correct adjustment range.

Applications of A-1180/ST STOMIL

The belt may be used in appropriately designed V-belt drives for:

• Industrial machinery.

• Workshop equipment.

• Air compressors.

• Ventilation fans.

• Pump drives.

• Agricultural machinery.

• Conveyor systems.

• Manufacturing equipment.

• Auxiliary drive systems.

• Machinery using classical A-profile pulleys.

These are general application examples. Compatibility with a specific machine must be verified using the required belt designation and drive configuration.

How to Select the Correct A-1180/ST V-Belt

Before purchasing, check:

1. Complete designation A-1180/ST.

2. STOMIL brand.

3. Classical A profile.

4. Top width of 13 mm.

5. Height of 8 mm.

6. Pitch length of 1180 mm.

7. Inside length of 1150 mm.

8. Outside length of approximately 1200 mm.

9. Pulley groove profile.

10. Available tension adjustment range.

11. Required transmitted power.

12. Rotational speed.

13. Environmental operating conditions.

14. Number of belts operating in parallel.

One of the most common selection mistakes is confusing inside length Li with pitch length Lp.

Installation of the STOMIL V-Belt

Step 1. Inspect the Pulleys

Before installation, check pulley groove condition, wear and cleanliness.

Damaged or unevenly worn pulleys may significantly reduce the service life of a new belt.

Step 2. Check Pulley Alignment

Pulleys must be correctly aligned.

Misalignment can cause accelerated wear of the belt sides, increased vibration and reduced drive efficiency.

Step 3. Install the Belt

Install the belt after reducing the shaft center distance or releasing the tensioning mechanism.

Do not force the belt over a pulley using sharp tools.

Step 4. Adjust Belt Tension

Belt tension must comply with the drive manufacturer's requirements.

Insufficient tension may cause slipping.

Excessive tension can increase the load on bearings and shafts.

Step 5. Inspect Operation

After startup, check belt tracking, vibration, noise and the operating temperature of the drive components.

If necessary, readjust belt tension according to the machine manufacturer's instructions.

Common V-Belt Problems and Their Causes

Why Does a V-Belt Squeal?

Possible causes include:

• Insufficient belt tension.

• Belt slipping on the pulley.

• Worn pulley grooves.

• Contaminated contact surfaces.

• Incorrect pulley alignment.

Why Does a V-Belt Wear Out Quickly?

Possible causes include:

• Incorrect belt profile.

• Excessive belt tension.

• Pulley misalignment.

• Pulley diameter that is too small.

• Drive overload.

• Unsuitable environmental conditions.

Why Does the Belt Come Off the Pulley?

Check pulley alignment, pulley condition, drive geometry, belt selection and tension.

Why Does the Belt Overheat?

Overheating may result from excessive slipping, overloading, incorrect tension or improper contact with the pulley grooves.

Can Only One Belt Be Replaced in a Multiple-Belt Drive?

In drive systems using several belts in parallel, the belts should be correctly matched in length and operating characteristics.

Replacing only one worn belt may lead to uneven load distribution between the belts.

For this reason, replacing the complete belt set is often recommended, subject to the equipment manufacturer's instructions.

Alternative Designations and Search Terms

The product may also be identified using the following terms:

• A-1180/ST STOMIL

• A 1180 STOMIL

• STOMIL A1180

• A 1180 V-belt

• Classical V-belt 13x8x1180

• A 1150 Li V-belt

• A-1150 Li / 1180 Lp belt

• STOMIL 13x1150 Li V-belt

• Classical V-belt A 1180

• STOMIL A1180 V-belt

• A-profile V-belt 13x8

• 1180 mm industrial drive belt

Frequently Asked Questions

What is A-1180/ST STOMIL?

A-1180/ST STOMIL is a classical A-profile power transmission V-belt with a width of 13 mm, a height of 8 mm and a pitch length of 1180 mm.

What are the dimensions of the A 1180 V-belt?

It has a nominal cross-section of 13x8 mm, an inside length of 1150 mm, a pitch length of 1180 mm and an outside length of approximately 1200 mm.

Does 1180 mm indicate the inside length?

No. In this designation, 1180 mm refers to the pitch length.

What is the inside length of the belt?

The inside length Li is 1150 mm.

What is the outside length of the belt?

The outside length is approximately 1200 mm.

What does profile A mean?

Profile A identifies a classical V-belt with a nominal cross-section of 13x8 mm.

Does A-1180 fit every V-belt pulley?

No. The pulley must have the correct groove profile, and the drive must be designed for the belt's length and operating characteristics.

Is the belt suitable for agricultural machinery?

It may be used in agricultural machinery equipped with a suitable classical A-profile belt drive. The required belt designation must be verified.

Can A-1180 be replaced with A-1210?

Not without checking the drive design. An A-1210 belt is 30 mm longer in pitch length.

Does a V-belt require lubrication?

No. Classical V-belts transmit power through friction and do not require lubrication of the surfaces contacting the pulleys.

Why might a new V-belt slip?

Possible causes include incorrect tension, worn pulleys, contamination or selection of the wrong belt profile.

Can the belt be used in a multiple-belt drive?

Yes, provided that the drive is designed for this arrangement and the belts are correctly matched as a set.

A-1180/ST STOMIL - Quick Technical Answer

A-1180/ST STOMIL is a classical A-profile power transmission V-belt with a nominal cross-section of 13x8 mm. Its pitch length is 1180 mm, inside length is 1150 mm and outside length is approximately 1200 mm. The belt is designed to transmit mechanical power in industrial and general-purpose V-belt drives using compatible pulleys.

STOMIL V-Belts at simmering.pl

simmering.pl supplies STOMIL V-belts, rolling bearings, sealing components and spare parts for industrial power transmission systems.

For accurate product identification, specify the complete designation A-1180/ST STOMIL, the A profile (13x8 mm) and the 1180 mm pitch length.

Our warehouse is located in Lublin, Poland. We ship orders throughout Poland, the European Union and worldwide.