2-30Ton Double Ram Jacks: Long-Stroke, Overload Protection for Cars/Trucks/Engineering
Product Specifications
Basic Information & Common Parameters
| Common Parameters |
Specific Description |
| Product Type |
Manual hydraulic double ram bottle jack, mainly used for vehicle lifting and equipment support, suitable for scenarios requiring "long-stroke lifting", covering 2-30Ton load range |
| Core Structure |
Adopts double ram series design (main ram + auxiliary ram); total lifting height equals the sum of the two rams' strokes (e.g., 98+92mm), which is more than 50% larger than that of traditional single-ram jacks; equipped with a height-adjustable notched saddle to adapt to lifting needs of different heights |
| Safety Configuration |
Built-in hydraulic overload protection valve (automatically relieves pressure when load exceeds 10% of rated capacity) to prevent bursting caused by uneven pressure during synchronous lifting of double rams; cylinder body is coated with anti-corrosion coating; base has anti-slip patterns to avoid rollover risk during lifting |
| Operation Configuration |
Standard one-piece solid handle (length: 380-450mm) with operating force ≤65N, easily operable by adult males; handle and jack body are detachably connected for space-saving storage |
| Applicable Scope |
Covers family cars, SUVs, light trucks, medium-sized engineering equipment (e.g., small generators), etc.; applicable for emergency tire replacement, chassis maintenance, equipment installation and commissioning; compatible with lifting needs of materials such as low-carbon steel and aluminum alloy |
Key Parameter Comparison by Model
| Parameter Category |
YD18-001 (2T) |
YD18-002 (4T) |
YD18-003 (6T) |
YD18-004 (8T) |
YD18-005 (10T) |
YD18-006 (12T) |
YD18-007 (16T) |
YD18-008 (20T) |
YD18-009 (30T) |
| Model |
YD18-001 |
YD18-002 |
YD18-003 |
YD18-004 |
YD18-005 |
YD18-006 |
YD18-007 |
YD18-008 |
YD18-009 |
| Rated Capacity |
2Ton |
4Ton |
6Ton |
8Ton |
10Ton |
12Ton |
16Ton |
20Ton |
30Ton |
| Min. Height (Min.H) |
165mm |
150mm |
154mm |
156mm |
225mm |
230mm |
232mm |
235mm |
250mm |
| Lifting Height (Lifting H) |
98+92mm (Total 190mm) |
80+80mm (Total 160mm) |
80+80mm (Total 160mm) |
80+80mm (Total 160mm) |
140+145mm (Total 285mm) |
140+145mm (Total 285mm) |
140+145mm (Total 285mm) |
140+145mm (Total 285mm) |
140+140mm (Total 280mm) |
| Adjustable Height (Adjust.H) |
55mm |
35mm |
40mm |
40mm |
50mm |
50mm |
50mm |
50mm |
None (Fixed Stroke) |
| Net Weight (N.V.) |
2.8kg |
4kg |
5kg |
6kg |
8.5kg |
10kg |
12kg |
15.5kg |
22kg |
| Main Material |
Cylinder: 20# seamless steel pipe; Base: 3mm cold-rolled steel plate; Saddle: Alloy structural steel |
Cylinder: 20# seamless steel pipe; Base: 4mm cold-rolled steel plate; Saddle: Alloy structural steel |
Cylinder: 20# seamless steel pipe; Base: 5mm cold-rolled steel plate; Saddle: Alloy structural steel |
Cylinder: 20# seamless steel pipe; Base: 5mm cold-rolled steel plate; Saddle: Alloy structural steel |
Cylinder: 45# thick-walled steel pipe; Base: 6mm cold-rolled steel plate; Saddle: High-strength alloy steel |
Cylinder: 45# thick-walled steel pipe; Base: 6mm cold-rolled steel plate; Saddle: High-strength alloy steel |
Cylinder: 45# thick-walled steel pipe; Base: 7mm cold-rolled steel plate; Saddle: High-strength alloy steel |
Cylinder: 45# thick-walled steel pipe; Base: 7mm cold-rolled steel plate; Saddle: High-strength alloy steel |
Cylinder: 50# thick-walled steel pipe (high-pressure resistance 45MPa); Base: 8mm cold-rolled steel plate; Saddle: Ultra-high-strength alloy steel |
| Operating Force |
≤35N |
≤40N |
≤45N |
≤48N |
≤50N |
≤55N |
≤60N |
≤62N |
≤65N |
| Overload Protection Threshold |
2.2Ton |
4.4Ton |
6.6Ton |
8.8Ton |
11Ton |
13.2Ton |
17.6Ton |
22Ton |
33Ton |
Product Details
The YD18-001~YD18-009 2-30Ton Double Ram Bottle Jack Series is professional equipment designed to address the pain points of "short lifting stroke of traditional single-ram jacks and poor stability of heavy-load lifting". With "double-ram long stroke + heavy-load stability + user-friendly operation" as the core, the nine-grade models cover light to medium heavy-load needs, solving the problem of "unable to extend at low height and unable to lift at high height". It provides efficient and safe lifting solutions for individual car owners, auto repair shops, and engineering teams, with core advantages as follows:
1. Double Ram Series Design, Effortless Long-Stroke Lifting
Breaking the stroke limit of traditional single-ram jacks, double rams work together to achieve "small size and long lifting":
- Doubled Stroke, Adaptable to High and Low Scenarios
The total lifting height is the sum of the two rams' strokes. For example, YD18-001 (2T) has a total lifting height of 190mm, 90% higher than that of single-ram jacks of the same size (about 100mm), which can easily lift SUVs with high chassis (e.g., Toyota Highlander); YD18-005 (10T) has a total lifting height of 285mm, which can lift the chassis of light trucks to more than 25cm, leaving sufficient maintenance space and avoiding the trouble of "needing to pad wood due to insufficient lifting height".
- Synchronous Double Rams, Stable Lifting Without Tilt
Built-in double-ram synchronous hydraulic valve, the pressure difference between the main ram and auxiliary ram is ≤0.5MPa during lifting, and the ram extension speed is consistent. The verticality deviation is ≤0.3mm when lifting 10Ton equipment, 70% more stable than ordinary double-ram jacks (with deviation often reaching 1mm); even in scenarios with unilateral force (e.g., lifting a single tire of a vehicle), the double rams can remain synchronous, with no risk of equipment tilt.
2. Heavy-Load Bearing Capacity, Comprehensive Safety Protection
Structure and materials are optimized for different load needs, balancing safety and durability:
- High-Strength Wear-Resistant Materials, No Deformation Under Heavy Load
Cylinders of medium and high-load models (10-30T) are made of 45#-50# thick-walled steel pipes. For example, the cylinder wall thickness of YD18-009 (30T) is 16mm, with high-pressure resistance of 45MPa. The radial expansion of the cylinder is ≤0.4mm when lifting 30Ton equipment; the base is equipped with reinforcing ribs, and the base load-bearing capacity of the 30T model reaches 60Ton (twice the rated load), with no depression during long-term heavy-load use, and the service life is twice that of ordinary jacks.
- Multiple Safety Designs, Eliminating Risks
In addition to the overload protection valve, the saddle is designed with anti-slip grooves, which increases the horizontal anti-slip force by 80% when lifting equipment with smooth surfaces (e.g., stainless steel shell generators); the anti-slip pattern on the base has a friction coefficient ≥0.7 on wet ground, with no sliding when lifting 20Ton equipment; the anti-corrosion coating on the cylinder can pass the 180-hour salt spray test, with no rust during long-term outdoor use, solving the problem of "easy damage in humid environments".
3. User-Friendly Operation Details, Labor-Saving and Space-Saving
Optimizations are made throughout the storage, operation, and adjustment processes to lower the usage threshold:
- Lightweight Design, Effortless Movement
Light-load models (2-8T) have a net weight of only 2.8-6kg. For example, YD18-001 (2T) can be carried to the bottom of the vehicle with one hand, suitable for outdoor emergencies of individual car owners; medium and heavy-load models (10-30T) control weight through structural optimization. For example, YD18-009 (30T) is only 22kg, which can be carried to engineering equipment by two people, with 27% higher mobility than similar 30Ton jacks on the market (mostly over 30kg).
- One-Piece Handle, Comfortable Operation
The handle length is ergonomically designed, and the 380-450mm length provides a longer force arm during pressing, with an operating force ≤65N (for 30T models), which can be easily applied by adult males; the handle is detachable, and the length is shortened to 150mm during storage, which can be stored in the toolbox together with the jack, avoiding the problem of "long handle occupying space"; some models are equipped with anti-slip sleeves on the handle, with no risk of hand slipping during long-term operation.
Application Scenarios
1. Individual Car Owner's Outdoor Emergency Tire Replacement for SUV (YD18-002)
Scenario Requirement: A Toyota Highlander (weight 2.1Ton, chassis height 190mm) has a flat tire in the suburbs; the vehicle needs to be lifted to 8cm off the ground for tire replacement, and the tool needs to be lightweight with a long stroke.
Operation Process:
- Select YD18-002 (4T): Carry the 4kg tool to the bottom of the vehicle with one hand; the 150mm minimum height can be easily extended under the chassis.
- Align the notched saddle with the chassis support point, press the handle to start double-ram lifting; the total stroke of 80+80mm lifts 160mm, making the tire 8cm off the ground.
- The overload protection system monitors the load (2.1Ton ＜ 4.4Ton threshold) to ensure safety; complete the tire replacement in 12 minutes, and the double rams retract synchronously after pressure relief.
Result: Compared with traditional single-ram jacks (with lifting height less than 100mm), no wood padding is needed to meet the tire replacement needs, and the lightweight design is suitable for outdoor single-person operation.
2. Chassis Maintenance of Light Trucks in Auto Repair Shops (YD18-005)
Scenario Requirement: Maintain the chassis drive shaft of a Foton Xiangling (weight 3.5Ton); the chassis needs to be lifted to 25cm height, and the tool needs to be stable with a long stroke.
Operation Process:
- Select YD18-005 (10T): Carry the 8.5kg tool to the bottom of the truck; the 225mm minimum height is compatible with the chassis gap.
- The double rams lift synchronously (total stroke of 140+145mm), lifting the chassis to 285mm height, leaving a 25cm maintenance space.
- During the drive shaft disassembly by maintenance personnel, the jack shows no shaking or tilting, and the whole process takes 40 minutes; open the pressure relief valve after completion, and the double rams retract slowly.
Result: The long-stroke lifting avoids repeated wood padding adjustments, and the double-ram synchronous design ensures stability, with maintenance efficiency 50% higher than that of single-ram jacks.
3. Installation of Small Generators by Engineering Teams (YD18-007)
Scenario Requirement: Install a 15Ton small generator (base height 230mm); it needs to be lifted to 280mm height for fixing anchor bolts, and the tool needs to be stable for heavy loads and anti-slip.
Operation Process:
- Select YD18-007 (16T): Two people carry the 12kg tool to the bottom of the generator; the 232mm minimum height is compatible with the base gap.
- The notched saddle clamps the generator support point, press the handle to start the double rams; the total stroke of 140+145mm lifts 285mm, meeting the installation height.
- During the installation process, the overload protection valve ensures the safety of the load (15Ton ＜ 17.6Ton threshold), and the base anti-slip pattern prevents sliding. The whole process takes 1.5 hours.
Result: The double-ram long stroke eliminates the need for segmented lifting, reducing installation steps compared with traditional jacks, and the anti-slip design avoids the risk of equipment tipping.
4. Medium-Sized Equipment Support in Heavy Machinery Factories (YD18-009)
Scenario Requirement: Support a 28Ton medium-sized machine tool for bottom maintenance; it needs to be lifted to 280mm height, and the tool needs to be high-pressure resistant and stable for heavy loads.
Operation Process:
- Select YD18-009 (30T): Transport the 22kg tool to the bottom of the machine tool with a small trolley; the 250mm minimum height is extended under the machine tool.
- The double rams lift synchronously (total stroke of 140+140mm), lifting the machine tool to 280mm height; the 50# thick-walled cylinder stably bears the 28Ton weight.
- During the maintenance process, the cylinder shows no expansion and the base shows no settlement, with no safety hazards throughout the 3-hour process.
Result: The 30Ton heavy-load capacity is compatible with the machine tool weight, and the double-ram design ensures stable lifting, improving maintenance safety and efficiency compared with ordinary single-ram jacks.
Frequently Asked Questions
Q1: During the lifting of the double-ram jack, the two rams extend at different speeds. What is the reason and how to solve it?
A1: It is mostly caused by insufficient hydraulic oil, blocked synchronous valve, or cylinder impurity jamming. Troubleshoot in the following steps:
- Check hydraulic oil level: Open the oil filling port; if the oil level is below the scale line, add 46# anti-wear hydraulic oil to the standard position, press the handle repeatedly 3-5 times, and test the double-ram synchronization;
- Clean the synchronous valve: If the oil level is normal, disassemble the synchronous valve (located at the connection of the double rams), rinse the valve core impurities with alcohol, apply a small amount of hydraulic oil, and reinstall it, then test the lifting;
- Troubleshoot the cylinder: If synchronization is still not achieved, check whether there are impurities jamming the cylinder inner wall; push the ram to reciprocate 10 times to discharge impurities; if jamming is severe, contact the manufacturer to clean the cylinder to avoid cylinder deformation caused by forced use.
Q2: The operating force of YD18-009 (30T) is relatively large during lifting. Are there any labor-saving tips?
A2: Labor can be saved through adjusting the handle angle, optimizing the lifting posture, and pre-lubrication:
- Adjust the handle angle: Adjust the angle between the handle and the jack body to 120° (the best force angle), which maximizes the force arm and reduces the operating force by 15%;
- Optimize the lifting posture: Stand with feet shoulder-width apart, sink the body center of gravity, and use waist strength to press the handle instead of arm strength alone, which can reduce muscle fatigue;
- Pre-lubrication: Apply lithium-based grease to the handle connection shaft and double-ram synchronous valve every month to reduce friction resistance, which can further reduce the operating force by 10%.
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