Rod ends and cylinder mountings
PR20-PR110 threaded rod ends, S series weld-on rod ends with round (C) and rectangular (N) bodies, and HT brand self-aligning rod ends.
A cylinder is never bolted directly to the load: the machine flexes, the load axis shifts, and in a connection without a rod end this misalignment loads the rod as a side force. We offer self-aligning rod ends under our own HT brand, and in our own cylinders we select the rod end by pin diameter and cylinder force. We ship rod ends from stock anywhere in Türkiye and abroad, and also sell them through our online store hidroticaret.com (Turkish).
Types
Threaded rod ends (PR series)
Screwed onto the rod end thread and locked with a clamping bolt; the spherical bearing in the eye takes up misalignment. The size is the eye (pin) bore diameter: 20 mm on a PR20.
Weld-on rod ends, round body (S…C)
Welded to the machine frame or to the cylinder base; round body.
Weld-on rod ends, rectangular body (S…N)
Weld-on type with a rectangular body; for welding to a flat surface and for tight layouts.
HT self-aligning rod ends
Rod ends with a spherical bearing that compensate for misalignment; forged steel (1040) and ductile iron (GGG40) body options.
Product images: hidroticaret.com.
How to select
A rod end lets the cylinder pivot with the load and so prevents side load on the rod. In a connection with no rod end or the wrong one, the seal first starts leaking on one side, the rod bends over time and the plating gets scratched; the replaced seal leaks again a few months later, because the seal is not the cause.
The size of a rod end is the eye (pin) bore diameter, and it is selected by the pin that carries the load, not by the cylinder rod diameter; confusing the two is a common mistake. On the threaded type the rod end thread must also match. In layouts with misalignment, a self-aligning rod end with a spherical bearing is used.
For the weld-on type, the choice depends on the shape of the surface to be welded and how tight the space is: type C on a round surface, type N on a flat surface and in tight spaces. After the rod end is fitted the pin must be greased; a rod end that runs dry wears oval and the cylinder starts knocking at every change of direction.
Comparison of rod end types
| Type | Connection | Size | When to use |
|---|---|---|---|
| Threaded (PR) | Screwed onto the rod end thread, locked with a clamping bolt | Eye (pin) diameter and rod end thread | On the rod side, removable connection |
| Weld-on, round (S…C) | Welded | Pin diameter | On a round surface, on the cylinder base |
| Weld-on, rectangular (S…N) | Welded | Pin diameter | On a flat surface, in tight layouts |
| Self-aligning (spherical) | Threaded or weld-on | Pin diameter | Layouts with misalignment |
Frequently asked questions
Is a rod end really necessary on a hydraulic cylinder?
Yes. In a connection without a rod end, misalignment loads the rod as a side force; the seal and guide ring wear early and the rod can bend.
Is rod end size selected by rod diameter?
No. The rod end is selected by the diameter of the pin that carries the load. On the threaded type the rod end thread must also match.
What is the difference between a threaded and a weld-on rod end?
The threaded type screws onto the rod end, is locked with a clamping bolt and can be removed; the weld-on type is permanently welded to the frame or to the cylinder base.
What do C and N mean in the S series?
C is the weld-on rod end with a round body, N the one with a rectangular body.
Why does my cylinder knock at every change of direction?
The rod end or pin may have developed play; a rod end that runs dry wears oval. The rod end and pin should be replaced and the pin greased regularly.
What material are HT rod ends made of?
The size and material are printed on the packaging: forged steel (1040) and ductile iron (GGG40) body options are available.
Stock, sizes and part numbers
Sizes in stock, manufacturer part numbers and brands are kept up to date in our catalog. Send us your requirement on WhatsApp or by e-mail and we will quote and ship worldwide.
Rod ends and cylinder mountings in the catalog Online store (Turkish) →