CMG offers multi stage telescopic hydraulic cylinder use material 27SiMn. As a professional manufacturing expert of Hydraulic Cylinders (with ISO9001&TS16949). Each cylinder before shipping should be tested to ensure that every cylinder meets quality standards

The telescopic hydraulic cylinder is a hydraulic cylinder with a multi-stage sleeve-shaped piston rod that can obtain a long working stroke. The telescopic hydraulic cylinder is also called a multi-stage hydraulic cylinder.

The telescopic hydraulic cylinder is made up of two or more piston hydraulic cylinders. The piston rod of the former piston cylinder is the cylinder of the latter piston cylinder. The extension speed changes from slow to fast, and the corresponding hydraulic thrust changes from large to small; this change rule of thrust and speed is just suitable for the requirements of various automatic loading and unloading machinery for thrust and speed. The order of retraction is generally from small to large, the axial length when retracted is short, the space is small, and the structure is compact. Commonly used in hydraulic systems of construction machinery and other mobile machinery, such as cranes, dump trucks, etc.

27SIMN Tensile strength and Yield strength compare with ST52-3 / E355

27simn (GB/T17396-2009)	Tensile strength (σb/MPa) ≥ 1050	ST52-3	Tensile strength (σb/MPa) ≥ 510	E355	Tensile strength (σb/MPa) ≥ 490
	Yield strength (σs/MPa): ≥ 950		Yield strength (σs/MPa):≥ 355		Yield strength (σs/MPa): ≥ 355

TG (TSG) series of multi-stage telescopic hydraulic cylinders (customized according to user requirements)

1. User according to their own working conditions determine the multi-stage telescopic cylinder use single-acting or double-acting (single-acting hydraulic cylinder: rises by hydraulic pressure, lowers or retracts by its own weight or external force; double-acting hydraulic cylinder: rises or retract back All shrinkage depends on hydraulic pressure).

2. The user should estimate the push and pull force required by the telescopic hydraulic cylinder to determine the size of the smallest stage of the piston rod ((It can be determined with the assistance of our technical engineers).

3. The user should replace what is the stroke of the multi-stage telescopic cylinder and the maximum total length of the telescopic cylinder. Determine the number of stages of the telescopic cylinder when the total length is limited, that is, use two-stage telescopic hydraulic cylinder or three-stage telescopic hydraulic cylinder or multi-stage Telescopic hydraulic cylinder

3. The user should estimate the stroke of the multi-section telescopic cylinder, what is the maximum total length of the cylinder, determine the number of stages of the telescopic cylinder under the total length limit. That is, the use of 2 stage telescopic hydraulic cylinders or 3 stage telescopic hydraulic cylinders or multi-stage telescopic hydraulic cylinders. (It can be determined with the assistance of our technical engineers).

4. The user finally determines the installation method of the telescopic hydraulic cylinder. Common installation methods are: Piston rod front end(top end): external thread, single earring, double earring, ball head, flange, etc.; cylinder barrel: front flange, rear flange, middle flange; cylinder base end single earring, cylinder base end double earring, middle trunnion, front and rear foot mount, etc.

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