Cleco 55RNAL-3-4 Inline Reaction Bar Pneumatic Nutrunner | 55 Series | Lever Start | 370 RPM | 25 - 51 (ft-lbs) Torque Range

When a fastening station needs controlled torque with reaction support, the Cleco 55RNAL-3-4 inline reaction bar pneumatic nutrunner delivers a 25–51 ft-lbs / 34–69 Nm torque range for production assembly work on medium-to-large fasteners. The inline reaction bar configuration helps absorb torque reaction (the twisting force felt by the operator as torque builds), making it better suited to repetitive fastening than a standard handheld nutrunner in higher-torque applications.

Part of the Cleco 55 Series, this lever-start tool combines a 1/2" square drive with 370 RPM free speed for controlled rundown before final tightening. The Clecomatic clutch system supports repeatable fastening by allowing torque control within the listed range, while the inline body style keeps the tool aligned with the fastener for fixture work, production stations, and assembly layouts where a reaction bar can be properly positioned.

Type: Inline Reaction Bar Pneumatic Nutrunner | Brand: Cleco | Model: 55RNAL-3-4 | Series: 55 Series | Start Type: Lever Start | Drive Size: 1/2" Square Drive | Torque Range: 25–51 ft-lbs / 34–69 Nm | Free Speed: 370 RPM | Overall Length: 16.1" / 410 mm | Weight: 6.5 lbs / 3.0 kg | Air Inlet: 1/2" NPT | Minimum Hose I.D.: 1/2" | Air Consumption: 55 SCFM

Features:

• Inline reaction bar configuration helps manage torque reaction during repetitive fastening work.
• Clecomatic clutch supports repeatable torque control within the 25–51 ft-lbs operating range.
• Lever start gives the operator controlled actuation while aligning the tool with the fastener.
• 1/2" square drive accepts compatible sockets for production fastening and assembly applications.
• 370 RPM free speed provides controlled rundown for medium-to-large threaded fasteners.
• Inline body style works well in fixtures, assembly cells, and applications where the tool is supported or guided by the workstation.
• 55 SCFM air consumption and 1/2" minimum hose I.D. should be matched with a properly sized compressed air supply.

Made in USA:

Applications:

• Industrial assembly stations — tightening nuts and bolts where a reaction bar can be used to control torque reaction.
• Heavy equipment and machinery production — fastening brackets, housings, supports, guards, and mounted components.
• Automotive, truck, and trailer assembly — controlled rundown on medium-to-large fasteners in repeatable production processes.
• Fixture-based fastening cells — inline nutrunner work where the tool is positioned against a known reaction point.
• Plant maintenance and tool crib replacement — standardizing Cleco 55 Series pneumatic nutrunners for established assembly procedures.

FAQs:

• Q: What does the reaction bar do on this Cleco nutrunner?
  A: The reaction bar helps absorb the twisting force created as the tool reaches torque. This reduces the amount of reaction the operator has to hold by hand and is especially useful in repetitive fastening stations.
• Q: What torque range does the 55RNAL-3-4 cover?
  A: This model covers 25–51 ft-lbs, or 34–69 Nm. That range should be matched to the fastener size, joint type, and torque specification required by the assembly process.
• Q: What does Clecomatic clutch mean?
  A: Clecomatic refers to Cleco’s torque-control clutch system used on production assembly nutrunners. It helps the tool deliver controlled fastening within the specified torque range.
• Q: What socket drive does this model use?
  A: The 55RNAL-3-4 uses a 1/2" square drive. Use compatible sockets and follow the torque procedure specified for the joint being assembled.
• Q: Is this tool intended for general garage use?
  A: No. This is a production pneumatic nutrunner intended for controlled assembly work, especially where a reaction bar can be positioned against a proper reaction point. For general automotive repair, a conventional impact wrench or ratchet wrench is usually a better fit.

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Need help selecting the correct Cleco Pneumatic Nutrunners for your application? Please call (800) 608-5210 or email info@intlairtool.com