Center-Hole (Hollow Plunger) Hydraulic Cylinders
Hollow-ram cylinders for pulling, tensioning and testing: run cable, rod or all-thread straight through the center.
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A Hole Straight Through the Ram
Center-hole (hollow plunger) cylinders have an opening running through the middle of the ram, so you can pass a cable, tendon, rod or threaded bar right through and pull on it. That single feature unlocks a whole category of tensioning, testing and pulling jobs a solid cylinder simply can't do.
Built for Tensioning and Pulling
Post-tensioning cable, tensioning tie-rods, load-testing anchors and bolts, cable pulling, and maintenance pulls are all natural fits for a hollow cylinder. Available in single- and double-acting versions to match how much control you need on the return stroke.
Where Center-Hole Cylinders Shine
- Post-tension and cable tensioning
- Anchor, bolt and material load testing
- Rod and cable pulling
- Any job that needs to pull through the center
Match the Right Hollow Cylinder
Center-hole cylinders come in a range of capacities, strokes and bore sizes. Give us your rod or cable diameter and the force you need and we'll spec the right Power Team hollow cylinder for the job.
Frequently Asked Questions
A cylinder with an opening running through the middle of the ram, also called a hollow plunger. You pass a cable, tendon, rod or threaded bar straight through the centre and pull on it, which is what makes tensioning work possible.
Post-tensioning cable, tensioning tie-rods, load-testing anchors and bolts, cable pulling and maintenance pulls. Anything where the thing you are pulling has to pass through the tool rather than sit in front of it.
Both are available, so you choose based on how much control you need over the return. Double-acting gives controlled retraction, single-acting is simpler.
Two numbers drive it: the diameter of the rod or cable going through the centre, and the force you need. Give us both on 832-671-0978 and we will spec the right Power Team hollow cylinder.
Not for anything that has to pass through the ram. That is the whole reason the hollow plunger exists, and there is no workaround with a solid ram.
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