Enerpac ERT-Series, Extended Raction Tube for RSL Torque Wrenches

How to Choose an Enerpac ERT Extended Reaction Tube

• Matching RSL wrench size — The reaction tube is sized to one RSL wrench frame; confirm your wrench model first, since the tube must seat correctly on the drive housing.
• Torque range (ft-lb) — The reaction tube has to handle the same reaction load the wrench generates at full output, so match it to your wrench's rated torque range rather than the bolt size alone.
• Drive size — RSL wrenches use a hex cassette or square drive head; the tube and reaction point should correspond to the same head configuration.
• Pressure — Enerpac high-pressure tools run to 10,000 PSI (700 bar). The reaction accessory must be rated for the full pressure your pump delivers.
• Reaction arm geometry — Confirm the reaction point reaches a flat, fixed surface or a neighboring nut; the extended tube exists for joints where a standard reaction foot can't reach.

Which Reaction Accessory Is Right for the Job?

Reaction tubes and reaction arms solve the same problem in different ways. Reach for an ERT extended reaction tube when the closest fixed surface is set back from the bolt and a standard reaction point can't span the gap. Choose the Enerpac RRA-Series reaction arm when you need to react against an adjacent nut or a surface at a different angle. Both attach to the same Enerpac RSL-Series hydraulic torque wrench, so the right choice comes down to where the reaction load needs to land on your joint. If you're unsure, describe the joint and we'll confirm which accessory clears it.

Complete the System

A reaction tube only works as part of a full bolting setup. The RSL wrench is driven by a hydraulic torque pump from our hydraulic pumps range, connected with rated hydraulic hoses and the correct twin-line couplers. For the full lineup of wrenches, cassettes, and reaction accessories, see our high pressure bolting tools category.

Cross-Referencing an Obsolete Reaction Tube

Reaction tubes wear and bend under repeated loading, and older RSL accessories are sometimes superseded by a new part number. If you have a tube stamped with a number that no longer appears in the current catalog, the equivalent current-production part is often a direct fit. Northern Hydraulics has supported Enerpac high-pressure bolting since 1963, so send the wrench model and the markings on the old tube and we'll identify the replacement. Request a cross-reference.