FAQs

Home / FAQs

What is an ATEX certificate?

The objective of ATEX is to ensure the free movement of Ex products within the European Union, by offering one harmonized compliance procedure accepted by all EU countries, eradicating the need for differing national standards.

The Directive removes barriers to trade by defining Essential Health and Safety Requirements (EHSRs) for Ex equipment. The EHSRs form the basis of an EU-accepted product conformity approval process that examines the potential ignition sources of equipment intended for use in explosive atmospheres.

What is a FRAS Belt?

FRAS (Fire Resistant Antistatic Belts) is the acronym for Fire Resistant Antistatic Belts.Belts are engineered so that the Belt meets local fire retardancy standards. This means these Belts are difficult to ignite and should never be the cause of a fire. Additionally, if ignited by an external fire source, they should minimize the propagation of the fire. These Belts are also Anti Static, meaning they provide electrical resistance to avoid the build-up of static electricity.

What is the concept of the FREE-SET?

Free Set Concept is applicable for power transmission V-Belts, any batch code material can be used in a mixed form on a multi-groove pulley drive without any fitment and performance issue. Free set tolerances are more stringent as compared to the international standard requirement.

Is it true that the Belt shrinks as it is stored?

Yes, the Belt may shrink after being stored for a long period, but it will regain its original length after being run on the drive for a few minutes.

Does the belt require re-tensioning?

Yes,to obtain the best life out of conventional construction belts, they must be re-tensioned within 24 hours of operation. Proper belt tension is essential for maximum belt life and efficiency. Improper belt tension is the leading cause of premature belt failure and increased costs. Under-tensioned belts lead to slippage, overheating, excessive pulley wear, rollover, and noise, resulting in higher maintenance costs and inefficient power transmission.

Does the belt require any lubrication to maintain the rubber hardness?

No, Belt does not need to be lubricated in any way.

What is the best practice to ensure optimum Belt life?

To get the best possible life out of the Belt, check the groove quality of the drive pulley, the Belt tension, the pulley alignment, and don’t force the Belt on the drive during installation.

What is the method of calculating Belt tension?

The drive design software from MyGEC is accessible on the website for calculating tension values according to drive and Belt sections.

Is it true that the GREDON Belt has antistatic properties?

Yes, all GREDON V and poly Belts, as well as timing Belts, meet the antistatic requirements of ISO-1813 and ISO 9563.

What is the recommended minimum pulley diameter?

It is the minimum pulley diameter at which the Belt can run and transmit power properly without causing the Belt to create excess bending stress.

Which sections of the wedge and narrow Belts are interchangeable?

Narrow	Wedge
3V	SPZ
5V	SPB

What is the shelf life of GREDON Belts?

6 years, if stored properly in a proper Belt storage environment.

What is the difference between standard and non-standard pulleys?

The standard pulley groove and pitch dimensions are as per international standards such as ISO 4182, IS 3142, etc.. whereas non-standard pulley groove dimensions do not comply with standard norms, normally groove depth and pitch value are different so banded belts cannot be used on the non-standard pulley.

What is a Dual duty pulley?

A dual-duty pulley is a common pulley where we can use classical and wedge section Belts on the same pulley such as A – SPA / B – SPB / C- SPC.

What is the standard length designation for classical, wedge, and narrow Belts?

Classical Sections: Inside Length Li (Inches)

Wedge Sections: Pitch Length Lp (mm)

Narrow Sections: Outside Length La (Inches)

What is the difference between polyester and aramid corded Belts?

The tensile strength of aramid corded Belts are normally 3-times higher than polyester corded Belts, Normally aramid corded Belts are used in application subjected to shock loads such as crusher, harvesters, etc.

Why EPDM Belts are suitable for high-speed applications?

The high-speed drive required high thermal resistance Belts, EPDM construction Belts are designed to offer a wide range of temperatures from -35 to 130°C to meet the application requirements, normally such applications are automotive engines, Generators, Compressor, etc.

What are dual power Belts?

Dual power Belts are double-sided V-Belts, Poly Rib V-Belts, Timing Belts, which can transmit the power from both sides and are normally used on serpentine drives where application demands to rotate the pulley in opposite directions, an application such as lawn and garden cutting drives, textile carding machine, printing machine, flour-mills, etc.