belting site top vis

Home Up Site Map Search Feedback Terms of Use

 

 

 

Home
Products
Services
News
About Us

 

 

 

 

 
     Your choices within the 'Services/Fabrication' section are:

   

nylon core
adhesive
 
methods

nylon core
splicing table

inch / mm

conveyor belt
joining data

inch
/ mm

belt
tolerances

inch / mm

order
  processing

terminology

 

Belt Fabrication Tolerances

VIS USA strives to hold tight tolerances for fabricated belts, particularly for small belts where accuracy is many times a decisive factor for the proper performance of a belt.  The following tables provide you with the guidelines we have in place in our workshop when fabricating belts for you.  

Please contact us if you need even closer tolerances. 

 
   


VIS STANDARD WIDTH TOLERANCES   
(metric)

convert to U.S. customary units

WIDTH [mm]

Tolerance [mm]

50

0.4

>50 and 300

0.8

>300 and 610

1.6

>610 and 1220

3.2

>1220

  0.25%


VIS STANDARD LENGTH TOLERANCES    (metric)  

 belts

LENGTHS [mm]

Tolerance [mm]

300

1.6

>300 and 1,222

3.2

>1,220 and 2,540

5

>2,540 and 6,100

8

>6,100 and 15,250

13

>15,250 and 30,500

19

>30,500 and 61,000

38

>61,000

0.07% 

b
Note: Due to the humidity factor, an additional correction factor of 0.5% of the measured dimension is required for belts  constructed of polyamide materials.

For belts made with cleats and guides, an additional 0.15% of the belt length must be allowed on the negative side of the overall tolerance.


A Word about Thickness Tolerances

Although the thickness tolerance for different products varies depending on the overall thickness, material composition and surface structure of a belt, tolerances for rubber covered nylon core belts can be held considerably tighter than leather covered products.  Since leather is a natural product, it is more difficult to control the outcome of the end product's nominal thickness.  Usually, leather covered flat power transmission belts vary in thickness no more than 0.01in. for single sided leather belts, and 0.015in. for double sided leather products.  However, it does happen on rare occasion, that a leather covered product falls just outside this range and is not considered to be faulty.

 

Go to the Top of this Page

Contact  rene@visusa.com with questions/ comments about this web site
Copyright 2001-2009  VIS USA, LLC