Welcome to the Specialist Supplier & Manufacturer to the Power Transmission Drives Industry
Copyright remains the property of Lakehurst Limited
Introduction to Precision Roller Chains -
Roller Chains have been around for along time, with little change in the Basic Design format.
Although there has been many production methods and design features being introduced, all claiming improvements in chain life and durability?
Generally regardless of how much you pay for a Chain or how good the Quality is, you always need to apply these golden rules,
1- Correct Chain Selection?
2- Correct Fitting including Lubrication & Tensioning if required?
3- Regular Inspection & Maintenance Program?
4- Replace Drive Sprockets when New Chain Fitted?
(The more of these rules you can apply the bigger the percentage of maximum life you will acheive and therefore the maximum benefit from the Quality to Cost ratio?)
Roller Chains are made up of five component parts:
Pin - Bush - Roller - Roller Link Plates (Inner Link) - Pin Link Plates (Outer
and to identify any given chain you need to establish accurate diamensions of the main characteristics of the chain?
obtain the following, you should be able to identify most chains:-
Pitch: (Pitch is measured from the centre point of one pin to the
centre point of the next pin, see pin link above)
Inner Width: ( Is a measurement of the width between the inner plates on the roller
Roller Diameter: ( Outside Diameter of the Roller)
these dimensions will normally be enough to identify a standard Roller series
drive chain, however we also recommend that you also obtain the following:-
Pin diameter? Roller Plate Thickness? Pin Plate Thickness?
Short Pitch Roller Chains fall into two main types:
British Series designed and developed within the UK and originally produced to the BS228 Standard, these chains were adopted within Europe and are now produced to the European Din 8187 Standard.
The American Series are similar in the respect of pitch sizes but are produced to the Amercian ANSI B 29.1 Standard and used exclusively in North & South America and Asia and then later produced in Europe to the Din 8188 Standard.
Over the years the American Series have been more highly developed than its British counterpart as more and more manufacturers have entered the chain market.
Subsequently the need for a common standard that all manufactuers across the global could produce to increased, hence The International Standards Organisation (ISO) introduced the ISO 606R Standard which covers both the British and American Short Pitch Series of Roller Chains.
Since its introduction it has become the Bench Mark Standard for all Chain Manufacturers to produce to, bringing conformity too the standard dimensions of these chains thereby benefitting the consumer in providing size interchangebility between Brands!
This does not mean that all Roller Chains are of the Same Quality?
As more Manufacturers have entered the market, forcing prices down, as a consequence some manufacturers have increase the value of their Brands with improvements in production technics and design features allowing for increased loading and chain life.
Therefore in todays Competitive and Golbal market, it is Chain Selection that plays the pivotal role, as the industry can no longer afford the one time accepted practice of recomending a chain based on ten times its loading to acheive a prolonged life.
Identifying a Roller Chain?
Getting Value for Money?