Cleco 20PTHH403 Shut-Off Model Pneumatic Pulse Tool | H-Series | 4,000 RPM | 3/8" Square Drive | 7.4 - 14.8 (ft-lbs) Torque Range

Built for repeat assembly fastening where a socket drive is preferred over bit tooling, the Cleco 20PTHH403 H-Series Shut-Off Model Pneumatic Pulse Tool delivers controlled fastening within a 7.4 - 14.8 ft-lbs torque range. Its 3/8" square drive accepts compatible sockets for bolts, nuts, and assembly hardware, while the 4,000 RPM free speed helps reduce cycle time during fastener rundown on production lines and repair stations.

The H-Series hydraulic pulse mechanism applies torque in short pulses, helping reduce reaction force compared with many direct-drive fastening tools. An inertia shut-off stops the tool at the set torque point for repeatable results, and Cleco’s efficient 3-chamber air motor, external speed control, and oil-less blades support low-maintenance operation in automotive, appliance, industrial assembly, and heavy truck production environments.

Type: Pneumatic Pulse Tool | Brand: Cleco | Model: 20PTHH403 | Series: H-Series | Configuration: Pistol Grip, Shut-Off Model | Drive Type: 3/8" Square Drive | Torque Range: 7.4 - 14.8 ft-lbs / 10 - 20 Nm | Free Speed: 4,000 RPM | Weight: 0.86 kg | Length: 8.70" | Air Inlet: 1/4" | Minimum Hose Size: 1/2"

Features:

• Shut-off pulse tool configuration supports repeatable torque control for assembly fastening.
• 3/8" square drive fits compatible sockets for nuts, bolts, and socket-driven assembly hardware.
• Hydraulic pulse mechanism helps reduce reaction force transferred to the hand and wrist during repetitive fastening.
• 4,000 RPM free speed supports fast rundown before final torque shut-off.
• Inertia shut-off helps stop the tool at the set torque point for improved repeatability.
• Efficient 3-chamber air motor supports consistent pneumatic fastening performance.
• External speed control allows tool speed to be adjusted for the application and joint condition.
• Adaptor 935472 is available separately for converting 3/8" square drive to 7/16" quick change.

Tech Tip: To increase tool performance, extend tool life, and lessen repair costs, use it with a Filter-Regulator-Lubricator FRL)

Applications:

• Automotive assembly: Fastening brackets, covers, supports, and light-to-medium threaded joints where repeatable torque control is required.
• Large appliance manufacturing: Installing bolts and socket-driven fasteners on frames, panels, housings, and subassemblies.
• Heavy truck and trailer production: Running down smaller socket-driven fasteners on cab, frame, interior, and accessory assemblies.
• Industrial assembly workstations: Supporting repetitive fastening tasks where lower reaction force and shut-off control help standardize the process.
• MRO and repair benches: Controlled fastening on fixtures, access panels, guards, and service components when the required torque falls within the tool’s range.

FAQs:

• Q: What is the difference between the 20PTHH403 and the 20PTHH40Q?
  A: The 20PTHH403 uses a 3/8" square drive for sockets, while the 20PTHH40Q uses a 1/4" quick change drive for hex bits. Choose the 20PTHH403 when the application uses socket-driven nuts or bolts.
• Q: What does “shut-off” mean on this Cleco pulse tool?
  A: Shut-off means the tool stops automatically when the preset torque point is reached. This helps improve fastening consistency compared with tools that depend only on operator feel.
• Q: What is a hydraulic pulse mechanism?
  A: A hydraulic pulse mechanism delivers torque in short controlled pulses. This reduces reaction force felt by the operator and makes the tool better suited for repetitive assembly fastening than many conventional impact tools.
• Q: Can I use quick change tooling with this model?
  A: This model is supplied as a 3/8" square drive tool. Cleco lists adaptor 935472 as an available accessory for converting 3/8" square drive to 7/16" quick change when that setup is required.
• Q: Is this tool meant for removing seized fasteners?
  A: No. This is a controlled assembly pulse tool, not a breakaway impact wrench. Use it for fastening applications that fall within the stated 7.4 - 14.8 ft-lbs torque range.

Looking for more information about Cleco Pulse Tool? Click here to view the Catalog.

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