When buying a hydraulic ram, you need to consider several factors that affect its performance and suitability for your application. Some of the important factors are:

Load capacity: This is the maximum force that the hydraulic ram can exert on the load. It is measured in tons or kilonewtons (kN). You need to choose a hydraulic ram that has enough load capacity to handle your task safely and efficiently. You also need to consider the safety factor, which is the ratio of the load capacity to the actual load. A higher safety factor means more margin of error and less risk of failure.

Stroke length: This is the distance that the piston rod travels when the hydraulic ram is fully extended or retracted. It is measured in millimeters (mm) or inches (in). You need to choose a hydraulic ram that has enough stroke length to complete your task without overextending or bottoming out. You also need to consider the clearance space available for the hydraulic ram and its accessories.

Bore size: This is the diameter of the cylinder that houses the piston rod. It is measured in millimeters (mm) or inches (in). The bore size affects the fluid pressure and flow rate required to operate the hydraulic ram. A larger bore size means more fluid volume and lower pressure, while a smaller bore size means less fluid volume and higher pressure. You need to choose a bore size that matches your hydraulic pump and hose specifications.

Pressure rating: This is the maximum fluid pressure that the hydraulic ram can withstand without damage. It is measured in pounds per square inch (psi) or megapascals (MPa). You need to choose a hydraulic ram that has a pressure rating that exceeds your hydraulic pump output and working pressure. You also need to consider the pressure spikes and fluctuations that may occur during operation.

Mounting style: This is how the hydraulic ram is attached to the load or the structure. There are different mounting styles available for different applications and orientations.

Some of the common mounting styles are:

• Flange mount: The hydraulic ram has flanges on both ends that can be bolted to flat surfaces.
• Clevis mount: The hydraulic ram has clevises on both ends that can be connected to pins or rods.
• Trunnion mount: The hydraulic ram has trunnions on one or both ends that can be supported by brackets or bearings.
• Eye mount: The hydraulic ram has eyes on both ends that can be hooked to chains or cables.
• Tang mount: The hydraulic ram has tangs on both ends that can be inserted into slots or holes.