Features
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Temperature
Features
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Temperature
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Fenitsa meets the needs and requirements of the machinery manufacturing sector, especially in pneumatics, to the maximum extent possible.
Some of the images and videos used on the site were created with the help of artificial intelligence.
When Should a Cylinder Head or Cap Be Replaced?
Heads and caps are the pressure-bearing ends of the cylinder: the front head carries the rod bearing and rod seals, the rear cap carries the mounting and port. Replace them if you find cracks, thread damage, a worn seal groove or a damaged port thread, and renew the bearing and seal kit at the same time.
- State the cylinder type (tie-rod, welded), bore, rod diameter and port thread.
- Send photos and dimensions of the old part if possible.
- Heads and caps are produced to the pressure class of the matching cylinder.
Front Head vs Rear Cap
| Part | Carries | Typical damage |
|---|---|---|
| Front head | Rod bearing, rod seal, wiper, front port | Bearing wear, damaged seal groove, leakage at the rod |
| Rear cap | Rear mounting (clevis, flange, trunnion), rear port | Oval mounting bore, damaged port thread |
Leaks at the front head usually come from rod seal or bearing wear; rear-cap problems usually come from side load or a loose mounting pin.
Frequently Asked Questions
Can I buy cylinder heads and caps separately?
Yes — for service, repair and custom cylinder builds.
What do you need to quote a head or cap?
Cylinder type, bore, rod diameter, port thread and mounting; photos and dimensions help.
Should seals be replaced with the head?
Yes, renew the seal and bearing kit whenever the cylinder is opened.
What pressure do heads and caps withstand?
They are made to the pressure class of the cylinder they belong to.