Cleco 7STHFC55Q Shut-Off Model Hydraulic Pulse Nutrunner | Inline Lever | 5500 RPM | 4.9 (ft-lbs) Max Torque

Built for low-torque production fastening, the Cleco 7STHFC55Q shut-off model hydraulic pulse nutrunner gives assembly teams fast rundown, repeatable torque control, and reduced reaction force in a compact inline lever configuration. Its 1/4" quick change drive accepts common insert bits for light fastening work, while the 5,500 RPM free speed helps operators run screws and small bolts down quickly before final torque shut-off. The 1.9–4.9 ft-lbs torque range supports controlled fastening on small assemblies where over-tightening can damage threads, housings, brackets, or plated components.

As part of Cleco’s C Series pulse tools, the 7STHFC55Q uses a hydraulic pulse shut-off system, which delivers torque through brief hydraulic pulses and automatically stops at the preset torque value. This makes it well suited for production stations where speed, repeatability, and lower reaction torque matter more than high breakaway power. The inline lever format keeps the tool aligned with the fastener for straight-on access in bench assembly, fixture work, and repetitive manufacturing tasks.

Type: Hydraulic Pulse Nutrunner | Series: C Series | Model: 7STHFC55Q | Configuration: Inline Lever | Drive Size: 1/4" | Drive Type: Quick Change | Free Speed: 5,500 RPM | Torque Range: 1.9–4.9 ft-lbs | Torque Range: 2.6–6.6 Nm | Air Inlet: 1/8" NPT | Air Consumption: 7 SCFM | Weight: 2.1 lbs

Features:

• Hydraulic pulse shut-off system supports repeatable torque control while reducing the reaction force felt by the operator.
• Inline lever start gives operators controlled activation while keeping the tool aligned with the fastener during repetitive assembly work.
• 1/4" quick change drive allows fast bit changes for light fastening and nutsetting applications.
• Motor governor equipped to help stabilize tool speed during production use.
• External torque adjustment allows the tool to be set for the required fastening range without disassembling the tool.
• External speed control helps match rundown speed to the joint, fastener, and production process.
• Reversible operation supports both tightening and removal tasks at the workstation.
• Oilless blades reduce routine lubrication demands inside the air motor assembly.

Made in USA:

Applications:

• Automotive assembly — installing small bolts, screws, clips, brackets, and light-duty threaded fasteners on production lines.
• Electronics and appliance manufacturing — fastening housings, panels, covers, and subassemblies where controlled torque helps prevent damage.
• General industrial assembly — repetitive bench fastening where low reaction torque and consistent shut-off improve process control.
• Fixture and workstation fastening — inline tool access for straight, controlled engagement in jigs, nests, and assembly fixtures.
• MRO and production support — removing and reinstalling small fasteners during repair, adjustment, and line maintenance work.

FAQs:

• Q: What does “hydraulic pulse shut-off” mean?
  A: Hydraulic pulse tools apply torque in short pulses instead of continuous twisting force. The shut-off mechanism stops the tool when the preset torque is reached, helping improve repeatability and reducing reaction torque compared with many conventional fastening tools.
• Q: Is the Cleco 7STHFC55Q used for high-torque bolting?
  A: No. This model is a low-torque production nutrunner with a 1.9–4.9 ft-lbs range. It is intended for small fasteners, light assembly, and controlled rundown work rather than lug nuts, structural bolts, or heavy maintenance fasteners.
• Q: What bits fit the 1/4" quick change drive?
  A: The 1/4" quick change output is commonly used with compatible 1/4" hex insert bits and adapters. Match the bit style, length, and fastener type to the application before use.
• Q: What air supply does this Cleco pulse tool require?
  A: Manufacturer data lists 7 SCFM air consumption and a 1/8" NPT air inlet. Use clean, regulated air and confirm the plant air system can maintain the required pressure during continuous production use.
• Q: When should I choose an inline lever pulse tool instead of a pistol grip tool?
  A: Inline lever tools are useful when the fastener is directly in front of the operator and straight tool alignment is preferred. Pistol grip tools are often chosen when the workstation layout or hand position requires a perpendicular grip.

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