Hydraulic Center Hole Jack

Hollow hydraulic cylinder jack for anchorage pull-out testing and tensioning applications

Max. Lifting Capacity 200 T
Stroke 200 mm
Max. Working Pressure 63.7 MPa

The hydraulic center-hole jack features a hollow plunger design, with center hole diameters ranging from 18 mm to 120 mm depending on the tonnage. It is used for anchor bolt tension testing, anchor rod installation, and similar applications. When paired with an intelligent digital pressure gauge, high-pressure hose with quick connectors, anchorage tools, and a portable carrying case, it forms a complete high-tonnage anchor pull-out testing system.

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Technical Parameters

Model	Lifting Capacity (T)	Stroke (mm)	Outer Diameter (mm)	Inner Diameter (mm)	Rod Diameter (mm)	Center Hole Diameter (mm)	Height (mm)	Working Pressure (MPa)	Weight (kg)
YDC-50-12	50	120	159	125	105	60	245	63.7	25
YDC-60-20	60	200	203	160	130	90	360	52.5	55
YDC-65-20	65	200	203	160	130	90	360	57.5	55
YDC-100-14	100	140	245	180	150	86	300	62.75	75
YDC-100-20	100	200	273	200	170	120	365	62.45	110
YDC-150-20	150	200	273	220	180	90	365	52.7	120
YDC-200-20	200	200	325	250	200	120	370	51	155

Features

Hollow design: Central through-hole structure allows steel bars, threaded rods, or cables to pass through.
Tensioning function: Designed specifically for tensioning prestressed anchors, steel tendons, or reinforcing bars.
Controlled return: Equipped with a double-acting cylinder for active and safe controlled return.
Optional long stroke: Available in multiple stroke specifications to meet large-displacement lifting requirements.
Easy installation: The jack can be directly fitted over the workpiece without requiring complex supports.
Multi-functional: Widely used in prestressed engineering, equipment installation, lifting, pushing, clamping, and testing applications.

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