We supply a range of heavy duty, high performance hinges. A lot of them are maintenance free and low vertical and lateral friction which means increased durability. Heavy duty hinges do not have to compromise an aesthetics either, with many offering a clean knuckle without an obtrusive bearing.
Heavy duty hinges use a thicker gauge of steel for internal doors and Grade 316 stainless steel for external entry doors. Hinges should comply with BS EN 1935 and there are two important digits to consider regarding the category of use and durability of a hinge, which are within the classification code for a hinge.
The first digit relates to category of use and this is graded 1 – 4 with 1 being a door with minimal use and 4 being a door subjected to frequent (sometimes violent) use.
The second digit relates to durability and this is measures in the number of test cycles it has undertaken. This is scored from 1-9 with 1 being 2,500 test cycles and 9 being 1 million test cycles.
This is not to be confused with the eighth digit in the classification code with is between 1-14 and is the Hinge Grade.