HYTORC STEALTH Low-Clearance Hydraulic Torque Wrench

The HYTORC STEALTH is a slim, dual-piston hydraulic torque wrench built for bolted joints where the clearance around the nut is too tight for a conventional wrench. The cut sheet describes it as a low-clearance tool with a continuous slim body, an integrated reaction pad and a Lock-On Release button, and it is reversible: the operator flips the tool over to change from tightening to loosening. It is one of the models Seven Star LLC can quote for flange make-up, heat-exchanger and pressure-vessel bolting, structural steel and rotating-equipment maintenance.

Low-clearance bolting with interchangeable links

The manufacturer states that the STEALTH was the first industrial bolting system with a continuous slim body, so the powerhead and the ratchet link share one profile. Links are interchangeable between hex, 12-point, HYTORC Washer and HYTORC Nut versions, which lets one powerhead cover several fastener sizes and joint styles. The uniswivel allows free movement and positioning of tools and hoses, and the optional Tool Retainer attaches the wrench to each bolt so the operator does not need to hold it in place during the stroke, giving hands-free bolting. Some models are available ATEX certified, and the manufacturer also describes subsea suitability on its product page; confirm the exact certificate and marking for the model offered before using the tool in a classified area.

Technical specifications

Model sizes and torque ranges

The figures below are taken from the manufacturer cut sheet. The torque range is the minimum and maximum output of the powerhead, and the hex range depends on the link fitted. Torque ranges are not interchangeable between models, so choose the size whose range brackets the target torque with margin at both ends.

Overall dimensions from the cut sheet for the standard hex link are given next.

Selecting the right STEALTH size

Start from the bolt diameter, the final torque from the joint calculation, and the hex or washer size. Pick the smallest model whose maximum torque exceeds the requirement, because a tool working near the bottom of its range is less accurate than one working in the middle. Check the radius and standard width against the free space around the nut, and decide whether a washer link, standard link or slim link is needed. A STEALTH is normally operated from a hydraulic pump with a hose set and quick couplers, and the pump pressure is set to the value read from the torque chart for the specific tool, not from the nameplate rating alone. The manufacturer supplies torque charts for each model and the tool must be used with a calibration certificate that matches its serial number.

Documents and quotation

The extended cut sheet is attached to this page, and the manufacturer also publishes a basic operations manual and torque charts. Before ordering, please confirm: the model size, the link type and hex size, whether an ATEX version is required, the pump and hose set, any reaction accessories such as the Tool Retainer, and the calibration certificate needed. Seven Star LLC is an independent supplier and quotes on request. See other lifting and handling equipment in Material Handling and Lifting Equipment, or send your bolt schedule through the quotation form.