what is Rod Ends or heim joint?

what is Rod Ends or heim joint?

Rod Ends or heim joint are small size self aligning spherical plain bearings which can take radial loads and two directional thrust loads at the same time.
Rod Ends cater for applications such as control linkages in machine tool, textile industry, farm equipment, packaging machinery, industrial robots and many other applications.

Male Rod Ends
Female Rod Ends

The rod end body is made from low carbon steel, cadmium or zinc plated to resist corrosion, and the ball is made of sintered steel which is oil impregnated during manufacture. They have good static load capacity but as a general guide the actual load should be limited to 1/3 to 1/2 of the load capacity listed in the rod end brochure to provide for long life of the rod end.
An optional extra is the provision of a grease nipple for lubrication and BR2 Plus is the right type of grease to use in these parts. However, if grease lubrication is not used, they can be oil lubricated by hand.

Rod ends are available with either a right hand or left hand thread on the shank. This is so that the rod end will resist unscrewing it's self in certain applications. Male and female threads are available and the female unit has either a wrench flat or formed nut to aid assembly.

Whilst the open style rod end is the norm, an alternative is the stud type shown to the right. The stud type is normally supplied on a female type rod end and may be listed as L type or L-Balls. The open type is sometimes referred to as INSERT type. In left hand thread types, the stud thread remains a standard right hand thread.

Part Numbers - Imperial

We use the FK numbering system for imperial rod ends (see appendix A). This consists of a prefix, the hole size in 16ths of an inch, and a suffix if applicable.

Economy Series (CM, CF)

The economy series rod ends have a case hardened steel ball which has been hard chrome plated. The body is low carbon steel, zinc plated, chromate treated.

Numbering System:
CM Male Type Right Hand Thread rod end
CF Female Type Right Hand Thread rod end
CML Male Type Left Hand Thread rod end
CFL Female Type Left Hand Thread rod end

The above prefix is followed by the size in 16ths of an inch.

For Stud type add the suffix Y, eg. CM6Y. For grease nipple add the suffix Z (not all sizes can be supplied with this option), eg. CF8Z.
A PTFE liner can also be supplied - add the prefix T, eg. CM12T rod end.

Commercial Series (M/F)
The precision series rod ends have a low carbon steel ball which has been hand chrome plated. The race is sintered Phosphor bronze, oil impregnated, and the body is low carbon steel, zinc plated  and chromate plated.

Prefixes:

M      Male - right hand thread rod end
ML     Male - left hand thread rod end
F       Female - right hand thread rod end
FL      Female - left hand thread rod end

Suffixes:
Y Stud type
Z Grease nipple

Example: M4SBZ - male right hand threaded with grease nipple, 1/4 inch hole.

Part Numbers - Metric

Yousen bearing use the THK numbering system for Metric rod ends (see Appendix B). This is similar to the Aurora system in having a suffix indicating type followed by the hole size in millimetres,

and a suffix to indicate variations to the standard.

Prefixes:
PHS   Female Type rod end
POS   Male type rod end
LHS   Studded type (female only) rod end

Suffixes:

Blank  Right hand thread rod end
L       Left hand thread rod end
Example - PHS 8 L - Female left hand thread with 8mm hole rod end.

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