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Product Description
3.1 T AND TKH FERRULES TKH ferrule EUROPEAN STANDARD SYSTEM – EN
13411-3
GENERAL DESCRIPTION
The aluminium ferrules, type T and type TKH correspond to the
European standard for turnback ferrules (also known as ferrule
secured eye terminations, FSET). The standard is EN 13411-3. The
ferrule system is specified in Appendix 1. The ferrules are
extruded seamlessly over mandrel and the aluminium alloy is EN
AW-5051A according to EN 573-3. There is a conical ferrule called
TK which is similar to the TKH but without the inspection hole. The
TK ferrule does not comply with the EN standard. If used in any
application the selection table is the same as for TKH. Special
care has to be taken when using the TK ferrule due to lack of
inspection hole.
APPLICATIONS
The aluminium ferrules are the most commonly used ferrules on the
market today. They have a vast variety of applications, especially
in the lifting gear industry. The T ferrules and TKH ferrules are
thoroughly specified and very well defined for many different wire
rope applications. Four different cases are tested and verified
according to the standard, EN 13411-3. The ferrules can be used for
fibre core single layer wire ropes, steel core single layer wire
ropes, rotation resistant wire ropes and spiral strand ropes.
Always use new wire ropes.
THE CORRECT SIZE OF THE SLING EYE
If a thimble is not used, the distance from the swaged ferrule to
the inner bearing point of the soft eye must be at least 15 x the
wire rope diameter (D), as per the figure. The width of the eye
without load shall be approximately half its length. When using a
pin or a hook, the minimum eye size should be verified with the
formulas below.