Hydraulic Cylinder Jack General Purpose Threaded Ram With Safety Lock Nut Single Acting Spring Return

Product Description

• OST
• OSTS
• OLTS

Capacity (ton)	Capacity (kN)	Stroke (mm)	Model	Effective area (cm2)	Oil cap. (cc)	Closed height (mm)	Wt. (Approx.) (kg)
10	111	150	OST 10-150	15.9	239	245	4.50
15	167	150	OST 15-150	23.8	356	250	6.50
20	218	150	OST 20-150	31.2	468	260	9.00
25	270	150	OST 25-150	38.5	577	270	11.30
30	309	150	OST 30-150	44.2	663	275	14.50
50	550	150	OST 50-150	78.5	1178	290	26.50
75	792	150	OST 75-150	113.1	1696	295	37.00
100	1077	150	OST 100-150	153.9	2309	305	56.00
150	1589	150	OST 150-150	227	3405	325	86.00
200	2199	150	OST 200-150	314.2	4712	340	110.00
250	2661	150	OST 250-150	380.1	5702	350	134.00
300	3167	150	OST 300-150	452.4	6786	370	176.00
400	4008	150	OST 400-150	572.6	8588	405	240.00
500	4948	150	-	706.86	10603	-	0.00

Features of General Purpose Jacks Threaded Ram

Some features and benefits of general purpose jacks threaded ram are:

• They have a high capacity ranging from 10 to 1000 tons and stroke lengths up to 300 mm.
• They have low height and compact design that makes them suitable for confined spaces.
• They have spherical saddles for larger capacities that can accommodate misalignment and angularity of loads.
• They have aluminum bodies for lighter weight and corrosion resistance.
• They have fast and complete ram retraction due to the spring return mechanism.
• They have double acting models that can extend and retract faster than single acting models.

Applications of General Purpose Jacks Threaded Ram

General purpose jacks threaded ram have various applications such as:

• Lifting and supporting heavy structures such as bridges, buildings, piles, beams, and columns
• Pushing and pulling machinery, equipment, vehicles, and tools
• Testing concrete strength, soil compaction, and pile integrity
• Aligning and leveling components during assembly or installation
• Clamping and pressing metal sheets, pipes, or tubes

Advantages of General Purpose Jacks Threaded Ram

General purpose jacks threaded ram have several advantages such as:

• High load capacity ranging from 10 to 1000 tons
• Long stroke length up to 300 mm
• High working pressure of up to 700 bar
• Durable construction with coated pistons to resist corrosion and abrasion
• Spherical saddle for better load distribution (optional for lower capacities)
• Fast and complete ram retraction

However, general purpose jacks threaded ram also have some limitations, such as:

• Limited side load capacity due to the thread design
• Need for regular lubrication of the threads to prevent wear and tear
• Risk of overloading or damaging the jack if not used properly

Safety Precautions

Therefore, it is essential to follow some safety precautions when using general purpose jacks threaded ram, such as:

• Always use a suitable pump with adequate pressure rating and flow rate
• Always use high-quality hydraulic oil with proper viscosity and cleanliness
• Always check the jack for any leaks, cracks, or damages before use
• Always use a flat and stable base to support the jack
• Always align the jack with the load axis to avoid bending or tilting
• Always use a gauge or indicator to monitor the pressure applied on the jack
• Always release the pressure gradually after completing the operation

Working Process of General Purpose Jacks Threaded Ram

General purpose jacks threaded ram are hydraulic devices that lift, push or pull heavy loads with high force. They have a threaded ram with a safety lock nut that can hold the load in place for a long time. They are used for various applications such as concrete pile testing, bridge support work, construction, and heavy industries.

The working process of general purpose jacks threaded ram can be outlined as follows:

1. The jack is connected to a hydraulic pump that supplies pressurized oil to the jack through a hose.

2. The pump is operated by an electric motor or a manual lever to generate the required pressure and flow rate of oil.

3. The oil enters the jack through an inlet port and pushes the piston inside the cylinder upwards.

4. The piston moves the ram upwards along with the load attached, utilizing a saddle or an adapter.

5. The ram has a thread on its outer surface that matches the thread on the lock nut inside the cylinder.

6. As the ram moves up, it rotates slightly and engages with the lock nut, which prevents it from sliding back down under gravity or external force.

7. The load is thus held securely by the jack in any position without any oil leakage or pressure loss.

8. To lower the load, the pump is reversed or stopped, and a release valve on the jack is opened to allow oil to flow back from the cylinder to the reservoir.

9. The piston moves down due to its weight and disengages from the lock nut, which rotates slightly and allows the ram to slide freely.

10. The load is lowered gradually by controlling the oil flow speed through the release valve until it reaches its desired position.

Robust Construction & Safety Features

This hydraulic jack utilizes a high-strength alloy steel cylinder and hard chrome plated ram, ensuring exceptional durability and resistance to industrial wear and corrosion. The integrated safety lock nut prevents accidental descent, delivering secure load holding even during extended operations. Designed with over-travel protection and pressure relief mechanisms, safety is enhanced for critical lifting and maintenance tasks.


Versatile Application & Mounting Options

Adaptable to diverse requirements, the jack supports multiple mounting options, including base and side mounting, and stroke lengths ranging from 250mm to 600mm. With a threaded ram and grooved, stable base plate, users can achieve precise positioning for lifting, pushing, lowering, or holding loads in construction, workshop, and heavy-duty industrial settings. Accessories like thread protectors and couplers further augment connectivity and protection.