A single-acting, spring-return hollow plunger hydraulic cylinder series with a center-bore body that works over a stud, shaft, or rod — suited to pulling, tensioning, testing, and lifting applications.
| Model Code | Capacity | Stroke (mm) | Closed Height A (mm) | Extended Height B (mm) | Outer Diameter D (mm) | Center Bore Y (mm) | Oil Cap. (cm³) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| HBS-DL-20-49 | 20 t / 215 kN | 49 | 162 | 211 | 98 | 26.9 | 150 | 2.9 |
| HBS-DL-30-64 | 30 t / 326 kN | 64 | 178 | 242 | 114 | 33.3 | 298 | 4.0 |
| HBS-DL-60-76 | 60 t / 576 kN | 76 | 247 | 323 | 159 | 53.8 | 626 | 10.4 |
| HBS-DL-95-76 | 95 t / 931 kN | 76 | 254 | 330 | 212 | 79 | 1011 | 23.4 |
Maximum working pressure is fixed at 700 bar (~10,153 psi) across all models. A: closed height, B: extended height, D: outer diameter, Y: center bore dimension. Dimensions are subject to engineering verification before final production.
Direct working capability over a stud, shaft, or rod.
Ideal force transmission for nut tensioning and pulling applications.
Precise axial force for structural test and calibration setups.
4 models cover mid-to-high capacity requirements.
A 7075-T6 aluminum alloy body delivers high pressure resistance despite the center-bore design — about 60% lighter than an equivalent steel model.
The bore's center axis aligns easily with the stud/shaft axis.
The cylinder is passed over the stud or shaft through the center bore.
The cylinder axis is aligned with the axis the force will be applied along.
Pressure from the pump converts into force through the effective area.
Controlled pressure is applied until the target force is reached.
Pressure is released and the spring mechanism retracts the piston.
Body: 7075-T6 aluminum alloy, hard anodized coating · Center bore: model-specific per Y dimension · System: single-acting, spring return
Thanks to its center-bore body, it can work directly over a stud, shaft, or rod; it is used in pulling, tensioning, test loading, and lifting applications. The HBS-DL series is a single-acting, spring-return hydraulic cylinder/jack series designed for this purpose.
It covers a 20–95 ton capacity range across 4 models; the center bore dimension (Y) ranges from 26.9 mm to 79 mm depending on the model. Full dimensions are listed in the model table.
The stud or shaft is passed through the cylinder's center bore and aligned axially; pressure from the pump is then converted, in a controlled way, into axial force to apply pulling/tensioning.
It works with a 700 bar class hydraulic pump (hand pump or power unit) using the 3/8″ NPT/F connection standard.
What sets the HBS-DL apart from the other series is its center-bore body; it is the preferred choice for applications that require working over a stud or shaft. HBS-GA is the general purpose series, HBS-DP is for confined spaces, and HBS-CT is for work that requires double-acting control.
It is used in applications that require force transmission along the center axis, such as stud tensioning support, shaft/rod pulling, structural test setups, heavy lifting, and bearing removal/installation.
Weight varies by model: the smallest model (HBS-DL-20-49) weighs approximately 2.9 kg, and the largest model (HBS-DL-95-76) weighs approximately 23.4 kg.
It is manufactured with a 7075-T6 aluminum alloy, hard anodized body, which provides high pressure resistance despite the center-bore design.
Determine your stud or shaft diameter and target force, then select the appropriate code from the model table based on the center bore (Y) dimension and capacity; you can also get a recommendation through the technical quote form.
Thanks to standard seal kits and a modular design, it can be serviced quickly through periodic visual inspection and seal replacement.
Yes. It is also referred to as a "hollow plunger hydraulic jack" in field language, while the term "hollow plunger hydraulic cylinder" is used in technical documentation.
Yes. We handle maintenance and repair of HBS-DL series cylinders in-house — send us your faulty unit and we'll inspect it and manage the repair process. We also manufacture original spare parts (seals, pistons, etc.) on request for the models we produce — we don't maintain a separate spare parts catalog, but you can contact us directly for the part you need.
Related: HBS cylinder selection guide Cylinder use and maintenance guide Complete system solutions System selector
Share your stud or shaft diameter and target force, and we'll recommend the right HBS-DL model.
Technical Quote Form →