When production fastening calls for compact impact power in a metal-housing tool, the Cleco CWM-375R Pneumatic Impact Wrench gives maintenance crews, assembly teams, and repair technicians a fast-running 3/8" retaining ring drive for sockets that need quick changes and secure retention. Its 340 ft-lbs torque range maximum supports common bolting work on machinery, fixtures, brackets, and service components, while the 450 ft-lbs breakaway torque helps remove tightened or stubborn fasteners before reassembly. The 12,000 RPM free speed speeds up fastener run-down before final impact loading, and the 1,400 blows per minute impact rate delivers repeated hammering action for steady torque output during fastening and removal.
Part of Cleco’s CWM Metal Housing Series, this impact wrench uses a triple heat-treated twin hammer mechanism (an impact system that delivers two hammer strikes per rotation for balanced power transfer) and a durable all-metal housing for work areas where composite housings may not be the preferred choice. The 26.9 SCFM air consumption and 1/4" air inlet make the CWM-375R a practical choice for properly supplied pneumatic stations in industrial maintenance, manufacturing, and equipment service environments.
Type: Pneumatic Impact Wrench | Series: CWM Metal Housing Series | Model: CWM-375R | Torque Range Max: 340 ft-lbs / 450 Nm | Breakaway Torque: 450 ft-lbs | Blows Per Minute: 1,400 BPM | Free Speed: 12,000 RPM | Air Consumption: 26.9 SCFM | Weight: 3.31 lb | Drive Size: 3/8" | Drive Type: Retaining Ring | Air Inlet Size: 1/4"
Features:
- CWM Metal Housing Series construction supports use in harsh production and maintenance environments.
- Triple heat treated twin hammer mechanism provides balanced impact energy for fastening and bolt removal.
- Variable speed trigger helps the operator control run-down speed before the tool reaches full impact.
- Durable all-metal housing gives the tool a solid exterior for shops and workstations where metal-bodied tools are preferred.
- 3/8" retaining ring drive helps hold sockets in place while still allowing practical socket changes.
- High 12,000 RPM free speed helps reduce time spent running nuts and bolts down before final tightening.
- Compact 3.31 lb tool weight supports repeated fastening tasks without stepping up to a larger drive size.
Made in USA: 

Tech Tip: To increase tool performance, extend tool life, and lessen repair costs, use it with a Filter-Regulator-Lubricator FRL)
(Graphic Below is To Highlight Product Features Only, thumbnail photo represents the actual tool.)
Applications:
- Industrial maintenance and MRO: removing and installing fasteners on guards, brackets, pumps, conveyors, and production equipment.
- Manufacturing and assembly stations: running down 3/8"-drive socket fasteners where speed and repeatable pneumatic power are needed.
- Fleet, equipment, and repair shops: handling service fasteners on machinery, support frames, and general shop repairs within the tool’s torque range.
- Metal fabrication and fixture work: tightening nuts and bolts on jigs, tooling plates, fixtures, and fabricated assemblies.
- Serious garage and workshop use: working on rusted or tight fasteners when the air supply can support the tool’s 26.9 SCFM requirement.
FAQs:
- Q: What does the retaining ring drive do?
A: A retaining ring uses a ring on the anvil to help hold sockets on the drive. It is useful when operators need secure socket retention but still want to change sockets without a pin-style setup. - Q: Is 340 ft-lbs the same as breakaway torque?
A: No. The catalog lists 340 ft-lbs as the torque range maximum and 450 ft-lbs as breakaway torque. Breakaway torque is the removal force used to loosen fasteners, while the torque range maximum is the fastening torque figure shown for the tool. - Q: What air supply does this impact wrench require?
A: Cleco lists air consumption at 26.9 SCFM with a 1/4" air inlet. Use this tool with a properly sized air system and FRL so pressure and airflow remain stable during repeated impacts. - Q: Can I use this for automotive work?
A: It can be used for shop and garage fastening tasks that match the 3/8" drive size and torque rating. It is not a substitute for larger 1/2", 3/4", or 1" drive impact wrenches when higher breakaway torque is required. - Q: What is a twin hammer mechanism?
A: A twin hammer mechanism uses two hammers to strike the anvil during rotation. This helps deliver balanced impact energy and is common in pneumatic impact wrenches used for production and maintenance fastening.

| SKU | Torque Range Max | Breakaway Torque | Blows Per Minute | Free Speed | Air Consumption | Weight | Drive Size | Drive Type | Air Inlet Size | |
|---|---|---|---|---|---|---|---|---|---|---|
| Ft Lb | Nm | Ft Lb | r/min | Scfm | Lb | in | in | |||
| CWM-375P | 340 | 450 | 450 | 1400 | 12000 | 26.9 | 3.31 | 3/8 in | Pin Anvil or Pin Hole | 1/4 |
| CWM-375R | 340 | 450 | 450 | 1400 | 12000 | 26.9 | 3.31 | 3/8 in | Retaining Ring | 1/4 |
| CWM-500P | 850 | 1200 | 1200 | 1200 | 9000 | 39.8 | 5.8 | 1/2 in | Pin Anvil or Pin Hole | 1/4 |
| CWM-500R | 850 | 1200 | 1200 | 1200 | 9000 | 39.8 | 5.8 | 1/2 in | Retaining Ring | 1/4 |
| CWM-750P | 1350 | 2339 | 1725 | 1200 | 6000 | 54 | 10.4 | 3/4 in | Pin Anvil or Pin Hole | 3/8 |
Looking for more information about Cleco Impact Wrench? Click here to view the Catalog
Need help selecting the correct Cleco Impact Wrenches for your application? Please call (800) 608-5210 or email info@intlairtool.com
warning WARNING: This or other products sold on this website may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
