Enerpac HMT-Series Hydraulic Torque Wrenches

How to Choose an Enerpac HMT-Series Hydraulic Torque Wrench

• Torque range (ft-lb) — Match the tool's rated output to the target bolt load. Pick a model whose target torque falls in the middle of its range, not at the maximum, so you keep accuracy and headroom.
• Drive / square size — Square-drive HMT tools use a fixed cassette sized to the socket series (typically 3/4", 1", or 1-1/2"). Confirm the square size matches your impact-grade sockets.
• Operating pressure — HMT tools are rated to the Enerpac standard of 10,000 PSI (700 bar). Torque output is set by pump pressure, so a calibrated pump and gauge are required to hit a specified value.
• Reaction arm — The reaction arm braces against an adjacent nut, flange, or fixed object to absorb the turning force. Confirm the arm geometry clears your joint and has a solid reaction point before the first pull.
• Calibration — For documented bolting, use a tool with a current calibration certificate and a matched pump so the pressure-to-torque conversion holds.

Which Enerpac Torque Wrench Is Right for the Job?

The HMT cassette design is for tight, low-clearance flanges where a hex-link tool cannot seat. For open joints and general structural bolting, the Enerpac SX-Series square drive hydraulic torque wrenches offer a wider torque range with interchangeable square drives. The Enerpac RSQ-Series torque wrenches and square drive heads swap between a low-profile head and a square drive on one body. For very large studs where torque reaction is impractical, the Enerpac EAJ-Series Aquajack subsea bolt tensioners stretch the bolt directly instead of turning the nut. Browse the full high pressure bolting tools range to compare across families.

Complete the System

An HMT wrench is one part of a bolting setup. You need an Enerpac torque-wrench pumps with a calibrated gauge to set pressure-to-torque, plus Enerpac twin torque-wrench hoses to feed advance and retract on a single coupler set. Add impact sockets, reaction-arm options, and swivels from torque wrench accessories. For disassembling seized joints, keep hydraulic nut cutters and Equalizer SWI-Series flange spreader sets on hand.

Cross-Referencing an Obsolete Enerpac HMT-Series Hydraulic Torque Wrench

If your HMT model number is discontinued or the cassette is worn beyond service, the replacement is usually a current tool with the same drive size and a torque range that covers your existing target value. Give us the legacy model, the square size, and the torque you need to hit, and we will match a current equivalent and the pump, hoses, and accessories to run it. request a cross-reference.