FAQ

There are various factors:

Based on above information & belt characteristics, the choice of belt is to be made.. OR just fill in the questionnaire & send to us & leave the spadework to us. We will recommend the belt most suitable for your application.

Crowning is the best method for tracking the belt. Once done there is zero maintenance throughout the life of the system, This works in both directions so Crowning is not a must but that is recommended by all belt manufacturers.

Tha formula below will approximately give crowning value for the roller. However there are other factors like belt length, type of the belt etc.

Preferred

Formulas to determine the values :
Pulley Width	Pw=1,1·*B + 10 (mm)
Taper	h=(Dp+100)/500(mm)

Legenda

Pw	Pulley Width
pcw	Width of the cylindrical section
B	Belt width
Dp	External Diameter
h	Taper

Alternative

Formulas to determine the values :
Pulley Width	Pw=1,1·*B + 10 (mm)
Taper	h=(Dp+100)/500(mm)
Width of the Cylindrical part of pulley	Pcw= Pw/2(mm)

Legenda

Pw	Pulley Width
pcw	Width of the cylindrical section
B	Belt width
Dp	External Diameter
h	Taper

The general tolerances are given below. However we can give belts in much closer tolerances.

The belt should be laterally stiff so that it will not buckle while running. Our Belt 2PURX40/5C, 2PURB40HI/5C, 2PURV45/5C, 1PURB35/LW, 1PURB55/LCW are suitable for Z conveyors.

Our EL Belts which have elongation upto 8% are suitable for short center conveying systems. With this you can even make fixed center conveying systems.

Belts with patterns like GP, FH, LG are suitable for inclined application. However, maximum inclination for each will depend on the product to be handled.

Belts like 2PURI0CW, 1PURB25CW are suitable for Knife edge systems.

Low noise antistatic belts are suitable . For example 23M2 U0-V10 B A FN

A thin non Antistatic belt 1PURXD30/EW is suitable for this application

Rollers supports are suitable for handling product like boxes. However, it is difficult to handle products like powder to handle on the conveyor with the rollers support. So, normally they are used where loads and length of the conveyors are very high.

There is no definite answer because the shelf life depends on environments, the way the belt is stored. Many times shelf life is less than the life of the belt put on the machine. To Avoid this the belt in the stored should be open then its bending place should be shifted. If this is not done then cracks develop at the bending position. To improve the belt life it should be stored in semi-transparent good quality plastic paper kept in a control humidity and temperature room

The belt failures can be due to numerous reasons and the postmortem is difficult as most of the time the belt is replaced by the staff without noting the signs of failure.
If the belt fails after working for 12 hour or more normally it is not due to manufacturing defects.

The overhead cost is increasing and it has started hurting many industries because now customers are asking for traceability in case of failure. Whether a customer is buying one pulley or 100 pulley the cost of sending quotation, processing order and collecting payment is the same for both. So, many european suppliers leavy billing cost from 10$ - 30$ per bill which barely covers the expenditure involved in case of small quantity order.

Yes. POLY CHAIN CARBON is the strongest belt.
The selection of the belt depends on the application, available space & economy. If adequate space is available then we recommend PowerGrip GT4 belts which makes the drive economical.

Product should be kept away from direct sunlight, fumes of chemicals, dust and dirt. It should be stored at around 5 degree centigrade - 20 degree centigrade. Minimum recommended dia for forward and reverse flexing to be maintained. Belt can be hanged on the (hooks, rod etc). However if the belt is long and heavy then we should use two or more rods. Belt should be preferably wrapped in the plastic film.

Most of the V-belt failures are due to improper design, installation and maintenance of the drive. This is left unnoticed because the drive is running though at the lower efficiency. V-belt tends to slip for meeting misalignment and underrated drive. If you compare properly designed and manufactured pulley as per recommended standards you will find the timing belt pulleys are cheaper than equivalent V-belt. In addition to initial cost there is saving due to small pulley diameter, smaller width of the pulley and less tension on the belt resulting in improved belt life. You will be surprised to note, we have replaced the 6 inch wide V-pulley drive with a 20mm wide timing belt, working satisfactory for 4 to 5 years.

There are various joining methods, finger joints are one of them. Depending on application, type of joint is decided. These belt joints are popular for conveyor application.

As we start drive, one side becomes tight whereas the other side becomes slack to accommodate belt elongation. Higher the pull higher the elongation resulting into higher sag. To reduce this sag the belt is pre-tensioned.

The strength of the belt depends on the type and diameter of the fibre. As the fibre diameter increases the Minimum diameter of the pulley will increase. We offer a special belt in which instead of a single bigger diameter of the fibre, a small diameter of the fibres are bunched together. This results in a reduced minimum diameter of the pulley..

Normal recommended speed for timing belt is 35 m/s. Our this restriction is due to lower grade pulley material.By using graded casting of En24 material we can increase the speed up to 45 m/s

We have several base belts and several coatings on them. It is very difficult to judge all characteristics between two surfaces plus it is also difficult to procaste the behaviour. There are many variable factors like friction value, temperature, speed, precision required and cost etc. So normally belt manufacturers offer 2 or 3 best possible combinations and the final decision is to be taken after a successful trial.

Belting Enterprises keep a variety of coating material in stock. There are various manufacturing methods for special coated belts depending on the requirements we recommend belts and coating on them. We also offer a combination of 2 or more coatings enabled in a belt.

In the last decade, many engineering materials are added resulting into solutions which were earlier not thought of. Vacuum belt, Timing belt with pin joint, boom conveyor for truck loading, cleated conveyor belts. These belts are so common that one do not realise that these are fabricated belts

Yes every made to order belt is especially made for a new application. Like rubber coated Timing belts are used for Form fill and Seal machines. Rubber coated Poly V belts are used for cable drawing machines. Here are: two different materials timing belt (no slip) and Poly v belt(has slip) are used for same drawing application
Some fabricated belts with application are given below:

Poorly manufactured V pulley will result in an inefficient drive which has more slippage, more losses and low life. However, it will work for maybe a few days or a few weeks. For a timing pulley, matching pulley and belt profile is must otherwise the belt will break within a short time. So, Quality pulley manufacturing is important for both V Pulleys and Timing Pulleys.

Metals when an exposed air gets oxidized and a dirty layer is formed on the surface of the pulley. To avoid rusting normally N.F. Pulleys are blackened or phosphatized. If you need better life and more accuracy the pulley should be electroless nickel coated. In this process the surface of the pulleys becomes hard and also rustproof. Aluminium material can be anodized and depending on the requirement of the user the hardness of the pulley can be different.

Pulley width will be always greater than belt width. This is to avoid belt running out of pulley teeth or belt riding over the side flanges. Due to spiral binding of the tensile member, misalignment in the pulleys. Errors in the pulley and belt manufacturing there will be always some tracking to overcome this problem, pulley width is always more than belt width. For certain profiles pulley width is equal to belt tooth. E.g. BATK profile

The timing belt is a positive drive and a pulley exerts pressure on the belt teeth and there is some friction when the belt enters or leaves the pulley this causes wear and tear of the pulley and belt. More the load more pressure will be exerted on the pulley teeth. So, higher loads need stronger material. Normally, pulleys for classical pitch and T series belts are aluminium material and higher pitches the pulleys are MS/EN8 or grades casting. The life can be further improved by hard anodizing aluminium pulley or electroless nickel plating and other material.

For Accurately manufactured timing pulleys 8MGT & 14MGT belts can be used on HTD Pulleys. However, 5MGT & 3MGT belts can not be used on 5MHTD or 3MHTD Pulleys. Please ask us for the chart showing compatibility of different types of belts used on the pulley with different profiles.

The belt which has high strength, lower thickness and high flexibility are supposed to be the best belt. However thickness and flexibility are opposite characteristics. So, if we reduce thickness the strength reduces but flexibility reduces. . A compromise has to be made between flexibility, strength and economy depending on the application.

The main reason is improvement in tensile member strength and flexibility. This improvement has resulted in smaller pulley dia or smaller belt width for the same transmission capacity.

Please download the questionnaire and fill maximum possible details with a few lines on your application and send it to us. We will try to recommend optimum belt pulley combinations for the same.