Cleco 55RNL-2T-4 Pneumatic Stall Collar Reverse Angle Nutrunner | 55 Series | Lever Start | 145 RPM | 130 (ft-lbs) Max Torque

When a fastening station needs the highest torque configuration in this 55 Series collar reverse group, the Cleco 55RNL-2T-4 pneumatic stall collar reverse angle nutrunner provides controlled right-angle rundown for socket-driven production assembly. This 55 Series lever-start model runs at 145 RPM, giving operators a slower, more deliberate fastening speed for higher-resistance joints. With 130 ft-lbs / 176 Nm max torque, it is suited for assembly work where repeatable pneumatic fastening matters more than impact-style breakaway force.

The stall drive system (a pneumatic torque-control method where the motor stops as joint resistance reaches the tool’s output) helps keep setup straightforward when air pressure, joint condition, and verification procedures are properly controlled. A 1/2" square drive accepts compatible sockets for bolts and nuts, while the collar reverse function lets the operator change direction for backing out fasteners, alignment correction, or rework. The right-angle head improves access around frames, housings, brackets, fixtures, and other obstructions where inline nutrunners may not reach cleanly.

Type: Pneumatic Stall Collar Reverse Angle Nutrunner | Series: 55 Series | Start Type: Lever Start | Drive Size: 1/2" Square Drive | Max Torque: 130 ft-lbs / 176 Nm | Free Speed: 145 RPM | Length: 16.8" / 425 mm | Weight: 6.5 lbs / 2.95 kg | Head Height: 1.63" / 41.28 mm | Side to Center: 0.72" / 18 mm | Air Consumption: 55 SCFM / 26 L/sec | Air Inlet: 1/2" NPT | Min. Hose I.D.: 1/2"

Features:

• Stall-type fastening provides simple pneumatic torque control for production assembly jobs requiring verified setup.
• 130 ft-lbs maximum torque supports higher-resistance joints within the 55 Series angle nutrunner range.
• 145 RPM free speed gives operators a controlled rundown rate for larger fasteners and higher-torque assembly points.
• Collar reverse operation allows the tool to be reversed for fastener removal, repositioning, and rework.
• Angle head configuration improves fastener access around frames, brackets, machine housings, and production fixtures.
• Heavy duty Cleco motor, gearing, and angle head construction support regular use in assembly environments.
• Torque can be adjusted by adjusting air pressure, allowing the fastening setup to be matched to the joint when properly tested.
• Planetary gears support tool speed changes with minimal parts service and replacement.

Made in USA:

Applications:

• Heavy equipment manufacturing — fastening brackets, mounts, guards, frames, and structural subassemblies with socket-driven hardware.
• Truck, trailer, and off-road equipment assembly — tightening higher-torque joints where right-angle access improves tool positioning.
• Industrial machinery production — controlled rundown on bolted assemblies, machine bases, housings, and fixture-mounted components.
• Plant maintenance and MRO — removing and reinstalling medium-to-high torque fasteners during repairs, rebuilds, and line changeovers.
• Agricultural equipment assembly — reaching fasteners around panels, frames, axle components, and welded structures.
• Production tool crib standardization — supporting stations that need reversible pneumatic angle nutrunners with verified torque setup.

FAQs:

• Q: What does the stall mechanism do on the 55RNL-2T-4?
  A: The stall mechanism runs the fastener down until joint resistance causes the motor to stop. It is a straightforward pneumatic fastening method for production work where torque output is controlled through air pressure, joint consistency, and torque verification.
• Q: Is this Cleco nutrunner the same as an impact wrench?
  A: No. This tool is used for controlled assembly fastening, not for hammering loose seized or rusted fasteners. For breakaway removal work, choose an impact wrench with the correct drive size and torque rating.
• Q: Why choose the 145 RPM version instead of a faster 55 Series model?
  A: The 145 RPM speed is paired with the higher 130 ft-lbs torque rating, making it a better match for larger fasteners or joints that need slower, more controlled rundown. Faster versions in the series trade some torque for speed.
• Q: What sockets work with this model?
  A: The 55RNL-2T-4 uses a 1/2" square drive. Use compatible 1/2" drive sockets selected for the fastener size, clearance, and production requirements of the application.
• Q: Should torque be checked after changing air pressure?
  A: Yes. Air pressure changes directly affect stall tool output, so torque should be verified with an approved audit method whenever setup conditions are changed.

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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