The bolt stretcher (hydraulic stretcher), made of alloy steel, can withstand a pressure of 150MPA and delivers greater force than its volume allows, making it an efficient tool for quick bolt removal and tightening. It offers a simple, safe, and cost-effective method for bolt fastening, commonly used in industries such as petrochemicals, electricity, metallurgy, and heavy machinery.

The standard hydraulic tensioner is designed for bolts of a single specification and primarily consists of a hydraulic cylinder with a tensioning head and a support bridge. It features a smaller outer diameter and volume compared to the interchangeable type hydraulic tensioner, making it suitable for applications with limited space.

Interchangeable hydraulic tensioners can be equipped with various tension heads for bolts of similar specifications, primarily consisting of three main parts: the tension head, the hydraulic cylinder, and the support bridge.

　　AloThe innovative dual-end interface design of the NSO (Alonso) bolt stretcher ensures that multiple stretchers can work simultaneously in series or parallel, reducing the number of oil lines and saving costs.

A single specification accommodates multiple bolt sizes.

Applicable sizes range from M24 to M100 (or 3/4")'-4Our oversized galvanized bolts, with customizable piston stroke.

The product boasts simplicity, wide applicability, high efficiency, ease of use, and agility. It achieves an accuracy of 0.5% on calibration pumps.