Cleco 55RNL-7T-4 Pneumatic Stall Collar Reverse Angle Nutrunner | 55 Series | Lever Start | 490 RPM | 41 (ft-lbs) Max Torque

When assembly work calls for controlled fastening in restricted spaces, the Cleco 55RNL-7T-4 pneumatic stall collar reverse angle nutrunner delivers a practical combination of reach, torque, and speed for production environments. This 55 Series angle nutrunner uses a stall drive system (the tool stops as fastener resistance reaches the tool’s torque output) for straightforward torque control on joints where air pressure and application setup are managed consistently. With 490 RPM free speed and 41 ft-lbs / 55.6 Nm max torque, it is suited for medium-torque assembly tasks where controlled rundown matters more than high-impact breakaway force.

The 1/2" square drive accepts standard compatible impact-rated sockets, while the collar reverse function allows the operator to change direction at the tool for removal, backing off fasteners, or rework. Its angle head helps reach around brackets, frames, and fixture obstructions, and the lever start throttle provides direct operator control during fastening cycles.

Type: Pneumatic Stall Collar Reverse Angle Nutrunner | Series: 55 Series | Start Type: Lever Start | Drive Size: 1/2" Square Drive | Max Torque: 41 ft-lbs / 55.6 Nm | Free Speed: 490 RPM | Length: 16.1" | Weight: 6.1 lbs | Head Height: 1.63" | Side to Center: 0.72" | Air Consumption: 55 SCFM | Air Inlet: 1/2" NPT | Hose Size: 5/8"

Features:

• Stall-type fastening provides simple torque control by allowing the tool to stop as joint resistance reaches the tool’s output.
• Collar reverse design lets the operator change direction quickly for fastener removal, repositioning, or rework.
• 490 RPM free speed supports controlled rundown on medium-torque assembly jobs.
• Angle head configuration improves access around fixtures, housings, brackets, and other tight assembly areas.
• Heavy duty Cleco motor, gearing, and angle head construction support regular use in production fastening environments.
• Torque can be adjusted by adjusting air pressure, allowing the tool to be matched to the fastening setup when properly tested and verified.
• Planetary gearing supports tool speed changes with reduced parts service and replacement requirements.

Made in USA:

Applications:

• General manufacturing assembly — tightening bolts and nuts on fixtures, brackets, frames, and machine subassemblies.
• Automotive and heavy equipment production — controlled fastening in locations where a straight nutrunner may not fit cleanly.
• Industrial MRO and plant maintenance — installing and removing medium-torque fasteners during equipment repair or changeover work.
• Appliance, agricultural, and machinery assembly — reaching fasteners around housings, panels, guards, and structural members.
• Tool crib and production line support — standardizing pneumatic angle fastening where repeatable setup and air supply control are available.

FAQs:

• Q: What does a stall nutrunner do?
  A: A stall nutrunner runs the fastener down until resistance in the joint causes the motor to stall. It is a simple pneumatic torque-control method often used where the fastening process is verified through air pressure settings, joint testing, and production controls.
• Q: Is the 41 ft-lbs rating breakaway torque?
  A: No. This is a nutrunner torque rating for controlled fastening, not an impact wrench breakaway rating. Use an impact wrench for loosening seized fasteners or high breakaway removal work.
• Q: What is the benefit of the collar reverse design?
  A: Collar reverse lets the operator change direction at the tool, which is useful for backing out fasteners, correcting alignment, or removing hardware during rework.
• Q: Can this tool be used in tight spaces?
  A: Yes. The angle head is built for access around obstructions where an inline or pistol tool may not fit, but the actual clearance should be checked against the head height and side-to-center dimensions.
• Q: Does torque need to be verified after setup?
  A: Yes. Because torque output depends on air pressure, joint condition, lubrication, and the fastening setup, final torque should be checked with an approved torque audit method before production use.

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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