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The LONGLOOD RACH Series Single Acting Aluminum Hollow Plunger Hydraulic Cylinders are designed for applications requiring both high-force pulling and pushing in a lightweight, portable package. Featuring a center-hole hollow plunger, single-acting spring return, and 700 bar (10,000 PSI) operating pressure, these cylinders are ideal for tensioning, cable pulling, shaft removal, bearing extraction, bolt stretching, and heavy lifting.
Manufactured from high-strength aluminum alloy, the RACH Series is significantly lighter than comparable steel cylinders, making it easy to transport and ideal for field service, construction, mining, bridge maintenance, offshore engineering, and industrial maintenance.
Available in capacities from 20 to 150 tons with 50 to 250 mm strokes, the RACH Series delivers outstanding performance while reducing operator fatigue and improving productivity.
The center-hole plunger allows the cylinder to be used for both pushing and pulling applications. It is ideal for tensioning rods, pulling shafts, removing bearings, extracting sleeves, and prestressing operations.
Manufactured from high-strength aerospace-grade aluminum alloy, the cylinder offers exceptional durability while significantly reducing overall weight compared with steel hydraulic cylinders.
Hydraulic pressure extends the piston while an internal heavy-duty spring automatically retracts it after pressure is released, improving efficiency and reducing operating time.
The precision-machined hollow piston features a hard chrome-plated surface for excellent wear resistance, corrosion protection, and smooth operation.
The hard-coated aluminum body provides excellent protection against corrosion and harsh working environments, making it suitable for indoor, outdoor, and marine applications.
Heavy-duty composite bearings minimize friction, improve side-load resistance, and extend service life.
A built-in stop ring prevents over-extension of the piston and enhances operational safety.
The aluminum construction allows operators to easily transport, position, and install the cylinder in difficult working environments.
The hollow plunger design allows use with threaded rods, puller systems, tensioning equipment, and other hydraulic accessories.
Engineered for reliable operation at 700 bar (10,000 PSI) to deliver powerful hydraulic performance.
The RACH Series is widely used for:
| Specification | Details |
|---|---|
| Product Series | RACH |
| Cylinder Type | Single Acting Aluminum Hollow Plunger Hydraulic Cylinder |
| Return Type | Spring Return |
| Capacity | 20–150 Ton |
| Stroke | 50–250 mm |
| Maximum Operating Pressure | 700 bar (10,000 PSI) |
| Cylinder Material | High-Strength Aluminum Alloy |
| Plunger Material | Hard Chrome-Plated Steel |
| Cylinder Type | Hollow Center Plunger |
| Surface Finish | Hard-Coated Corrosion-Resistant Aluminum |
Allows both pushing and pulling applications using threaded rods and hydraulic pulling systems.
The aluminum body significantly reduces weight, making transportation and installation easier than traditional steel cylinders.
Hard-coated aluminum construction provides long-term durability in outdoor, offshore, and humid environments.
Delivers reliable lifting and pulling force at 700 bar for demanding industrial applications.
Premium seals, composite bearings, and hard chrome-plated pistons ensure dependable performance with minimal maintenance.
Suitable for maintenance, construction, mining, manufacturing, transportation, energy, and heavy industry.
| Model | Capacity (Ton) | Stroke (mm) | Oil Capacity (cm³) | Collapsed Height (mm) | Extended Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| RACH-202 | 20 | 50 | 164 | 188 | 238 | 5.2 |
| RACH-204 | 20 | 100 | 327 | 251 | 351 | 6.1 |
| RACH-206 | 20 | 150 | 491 | 315 | 465 | 7.1 |
| RACH-208 | 20 | 200 | 654 | 378 | 578 | 8.0 |
| RACH-2010 | 20 | 250 | 818 | 442 | 692 | 9.0 |
| Model | Capacity (Ton) | Stroke (mm) | Oil Capacity (cm³) | Collapsed Height (mm) | Extended Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| RACH-302 | 30 | 50 | 256 | 208 | 258 | 8.0 |
| RACH-304 | 30 | 100 | 511 | 267 | 367 | 9.5 |
| RACH-306 | 30 | 150 | 766 | 333 | 483 | 11.2 |
| RACH-308 | 30 | 200 | 1022 | 395 | 595 | 12.9 |
| RACH-3010 | 30 | 250 | 1277 | 458 | 708 | 14.5 |
| Model | Capacity (Ton) | Stroke (mm) | Oil Capacity (cm³) | Collapsed Height (mm) | Extended Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| RACH-602 | 60 | 50 | 423 | 251 | 301 | 16.2 |
| RACH-604 | 60 | 100 | 847 | 315 | 415 | 19.5 |
| RACH-606 | 60 | 150 | 1270 | 380 | 530 | 25.6 |
| RACH-608 | 60 | 200 | 1694 | 445 | 645 | 26.0 |
| RACH-6010 | 60 | 250 | 2117 | 510 | 760 | 29.6 |
| Model | Capacity (Ton) | Stroke (mm) | Oil Capacity (cm³) | Collapsed Height (mm) | Extended Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| RACH-1002 | 100 | 50 | 823 | 258 | 308 | 33.8 |
| RACH-1004 | 100 | 100 | 1646 | 325 | 425 | 39.8 |
| RACH-1006 | 100 | 150 | 2487 | 391 | 541 | 46.2 |
| RACH-1008 | 100 | 200 | 3291 | 459 | 659 | 52.2 |
| RACH-10010 | 100 | 250 | 4114 | 527 | 777 | 58.8 |
| Model | Capacity (Ton) | Stroke (mm) | Oil Capacity (cm³) | Collapsed Height (mm) | Extended Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| RACH-1502 | 150 | 50 | 1129 | 280 | 330 | 48.9 |
| RACH-1504 | 150 | 100 | 2258 | 360 | 460 | 55.7 |
| RACH-1506 | 150 | 150 | 3387 | 430 | 580 | 63.0 |
| RACH-1508 | 150 | 200 | 4517 | 500 | 700 | 70.1 |
| RACH-15010 | 150 | 250 | 5646 | 570 | 820 | 77.2 |
A hollow plunger hydraulic cylinder has a center hole through the piston rod, allowing threaded rods, cables, or puller accessories to pass through. This makes it suitable for both pushing and pulling applications.
The aluminum construction reduces weight while maintaining high strength, making the cylinder easier to transport, install, and operate in field applications.
They are commonly used for bearing removal, shaft extraction, bolt tensioning, cable pulling, prestressing, flange maintenance, gear removal, and synchronized lifting systems.
The RACH Series is designed for use with any 700 bar (10,000 PSI) single-acting hydraulic pump.
Hydraulic pressure extends the piston, while the internal spring automatically retracts it when the pressure is released, allowing quick and efficient operation.
Yes. The hollow center design allows the cylinder to be used for both pushing and pulling when combined with suitable accessories such as threaded rods and puller attachments.
Yes. The hard-coated aluminum body offers excellent corrosion resistance, making the cylinder suitable for outdoor, marine, and humid working environments.
Yes. We offer OEM and ODM services, including custom capacities, strokes, center-hole sizes, mounting options, colors, and branding.
Regularly inspect seals, keep the piston rod clean, use clean hydraulic oil, check hydraulic connections for leaks, and store the cylinder in a dry environment when not in use.
The LONGLOOD RACH Series combines lightweight aluminum construction, a versatile hollow plunger design, 700 bar high-pressure performance, and precision engineering to provide a reliable solution for demanding lifting, pulling, tensioning, and maintenance applications. Designed for maximum portability and durability, these cylinders are trusted by professionals in construction, mining, energy, transportation, and heavy industry worldwide.
LONGLOOD is a leading China-based manufacturer and supplier of high-pressure hydraulic tools, delivering top-tier hydraulic solutions for various industrial applications.
Email: sales@longloodtool.com
Phone:+86-13599531763
Address: Unit 502, floor 5, Building B, # 1 workshop, Auto Industry City Parts Supporting Center (phase iv), Guankou Town, Jimei District, Xiamen,Fujian,China
We will contact you within 1 working day.
