Cleco 50ESN125KD4 NeoTek Inline Corded Electric Nutrunner | 455 RPM | 18.4 - 90.7 (ft-lbs) Torque Range | 1/2" Square Drive

When the assembly process calls for higher torque in a straight-line fastening setup, the Cleco 50ESN125KD4 NeoTek inline corded electric nutrunner delivers a 25–123 Nm torque range, equivalent to 18.4–90.7 ft-lbs, for controlled tightening of medium-to-high torque joints. It's 455 RPM speed supports deliberate rundown on larger fasteners, while the 1/2" square drive accepts compatible industrial sockets for production bolting tasks. The inline body helps keep the tool axis aligned with the fastener, which is useful in vertical stations, fixture-mounted work, and balanced tool setups.

As part of Cleco’s NeoTek corded electric fastening platform, this 50 Series nutrunner is built for transducer-controlled fastening, meaning torque is electronically measured during the cycle for process control and repeatable shutoff. Configurable LED light rings, tactile and audible feedback, programmable multi-function buttons, and onboard tool memory help operators and process engineers manage fastening results, tool setup, and maintenance planning in production environments.

Type: Inline Corded Electric Nutrunner | Brand: Cleco | Series: NeoTek 50 Series | Model: 50ESN125KD4 | Control Type: Transducer Control | Torque Range: 25–123 Nm / 18.4–90.7 ft-lbs | Free Speed: 455 RPM | Output Drive: 1/2" Square Drive | Weight: 2.40 kg / 5.29 lbs | Length: 460 mm / 18.11" | Side to Center: 28.0 mm / 1.10"

Features:

• Transducer control electronically measures fastening torque for repeatable tightening in controlled assembly work.
• 1 million cycles maintenance free rating supports production environments with frequent fastening cycles.
• Repeatability and accuracy with 2.0 Cm/Cmk at +/- 7% helps support documented fastening processes.
• Configurable LED light rings provide visual status feedback for operators at the workstation.
• Tactile and audible operator feedback helps confirm tool response during production fastening.
• Programmable multi-function buttons allow process-specific tool functions to be assigned at the handle.
• Onboard intelligent memory records setup values and cycle counts for tool tracking and maintenance planning.
• Brushless motor and modular assembly design help reduce wear points and simplify service when maintenance is required.

Made in USA:

Applications:

• Automotive and EV assembly — controlled tightening of larger brackets, chassis components, and structural fasteners within the tool’s torque range.
• Heavy equipment manufacturing — fastening guards, frames, mounts, and bolted assemblies where torque consistency is part of the build process.
• Truck, trailer, and bus production — running down 1/2" drive socket fasteners in stations that require electronic fastening control.
• Industrial machinery assembly — tightening rigid metal-to-metal joints on equipment frames, housings, and subassemblies.
• Balanced workstation fastening — inline use with tool balancers or fixture-assisted setups where straight alignment helps reduce side loading.

FAQs:

• Q: How does the 50ESN125KD4 differ from lower-torque 50 Series NeoTek inline models?
  A: This model reaches 123 Nm / 90.7 ft-lbs, giving it more torque capacity than lower-range 50 Series inline tools. The tradeoff is lower speed at 455 RPM, which is typical when a tool is configured for higher torque output.
• Q: What does the 1/2" square drive mean?
  A: The 1/2" square drive is the output connection for compatible sockets. It is a common drive size for medium-to-high torque fastening where smaller 3/8" drive sockets may not be appropriate.
• Q: Is this tool used like an impact wrench?
  A: No. This is a controlled electric nutrunner, not an impact wrench. It is used for measured fastening in assembly processes, while an impact wrench is typically used for high breakaway torque or less controlled removal work.
• Q: What does side to center mean on an inline nutrunner?
  A: Side to center is the offset distance from the side of the tool head to the centerline of the drive. It helps determine whether the tool can access fasteners near walls, brackets, fixtures, or adjacent components.
• Q: Does the 50ESN125KD4 require compressed air?
  A: No. This is a corded electric NeoTek tool, so it does not use compressed air and does not require a filter-regulator-lubricator. Confirm the correct Cleco controller, cable, and system setup before installation.

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