The Clarke X-PRO CAT154 (part number 3120168) is a large, 1-inch-drive pneumatic impact wrench marketed for heavy-duty work on commercial vehicles. Clarke rates it at a maximum torque of 3,800 Nm (±10%), but that is a manufacturer specification—not an independently verified result or a guarantee for every air setup and fastener. Its 17.2 kg tool weight, substantial air requirements and an unresolved discrepancy in Clarke’s stated anvil length are important considerations before buying.
What is the Clarke X-PRO CAT154?
The CAT154 is a professional heavy-duty air impact wrench with a 1-inch square drive, a rocking-dog impact mechanism and a second side handle, according to Clarke’s product page. Clarke positions it for large commercial vehicles. That intended use does not establish that it suits every vehicle or fastener; check the required drive, socket and working access for your job.
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The model is also identified as part number 3120168. The official CAT154 manual is marked original instructions, revision GC02/22 Rev 1. This review reports the manufacturer’s published specifications; no independent hands-on test or measured performance result is available here.
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Clarke CAT154 specifications
| Specification | Published figure | What it means |
|---|---|---|
| Drive | 1-inch square | Requires compatible 1-inch-drive impact sockets. |
| Impact mechanism | Rocking dog | Clarke’s product description identifies this mechanism. |
| Speed settings | Three forward and three reverse; 2,200, 3,200 and 3,500 rpm (±10%) | Speed values are listed in the manual; maximum no-load speed is 3,500 rpm at 90 psi. |
| Maximum torque | 3,800 Nm (±10%), approximately 2,800 ft-lb | Clarke’s maximum rating, not independently measured breakaway torque or a promised result in every setup. |
| Tool dimensions and weight | 630 × 230 × 200 mm; 17.2 kg | Dimensions and tool weight are from the manual. Clarke separately lists 18.64 kg as packaged weight on its product page. |
| Air inlet and hose | 1/2-inch BSP female inlet; minimum 13 mm hose internal diameter | Manual specifications. Clarke’s product page recommends a 13 mm hose. |
| Air pressure | Manual: 113–143 psi (8–10 kg/cm²). Product page: required 7.8 bar; maximum 9.8 bar. | The sources express pressure requirements differently. Use the manual for setup and verify the pressure delivered at the tool. |
| Air consumption | 10 cfm average; up to 55 cfm maximum | Figures from the manual. Clarke’s product page also gives 10 cfm average consumption. |
| Sound and vibration | 91 dB(A) sound pressure; 102 dB(A) sound power; vibration 14.9 m/s², K=2.3 m/s² | Values declared in Clarke’s manual, not independent measurements. |
How to interpret the torque and speed ratings
3,800 Nm is a maximum manufacturer rating
Clarke gives the CAT154 a maximum torque of 3,800 Nm (±10%). The figure is useful for identifying the tool’s stated capability, but it does not show what torque it will deliver on a particular fastener. Air pressure and flow at the tool, the airline and fittings, the socket and the work itself all matter. The available sources do not provide a controlled performance test or measured breakaway results.
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Speed figures are not a torque-control specification
The manual lists three speed settings—2,200, 3,200 and 3,500 rpm, each with a ±10% tolerance—and a maximum no-load speed of 3,500 rpm at 90 psi. These are manufacturer figures, not a measure of tightening accuracy. Do not assume a speed setting gives a calibrated final torque; use an appropriate torque-checking method for work that requires a specified fastener torque.
Air supply, hose and fitment considerations
The manual specifies a 1/2-inch BSP female air inlet, a minimum 13 mm hose internal diameter, 113–143 psi (8–10 kg/cm²), 10 cfm average consumption and up to 55 cfm maximum consumption. Clarke’s product page instead states 7.8 bar required and 9.8 bar maximum, while also listing 10 cfm average consumption and recommending a 13 mm hose. Because the pressure figures are presented differently, consult the manual and confirm compatibility with the tool and your air system rather than treating the product-page number as a substitute.
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The 10 cfm average figure alone is not enough to select a compressor. The published information does not establish a compressor size. Compare the compressor’s delivered airflow at working pressure with the tool’s requirements, and check that hose diameter, length, couplers and fittings are suitable for the setup. Confirm the required 1/2-inch BSP connection as well; a matching nominal size does not by itself establish thread compatibility.
Check the stated 720 mm anvil length
Clarke’s product description says the “long 720mm anvil” improves access in hard-to-reach jobs, but the same product page lists the wrench’s overall dimensions as 630 × 230 × 200 mm. An anvil length of 720 mm appears inconsistent with a listed overall length of 630 mm. The published information does not resolve the discrepancy, so verify the actual tool or ask Clarke to confirm the measurement before relying on that reach claim.
Rank #3
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Handling, noise and vibration
At 17.2 kg, the CAT154 is a heavy tool to position and hold. Consider the work position, access and how long the tool must be supported when deciding whether its size and mass suit the job. The 18.64 kg figure on Clarke’s product page is packaged weight, not the manual’s stated tool weight.
Clarke’s manual declares sound pressure of 91 dB(A), sound power of 102 dB(A), and vibration of 14.9 m/s² with uncertainty factor K=2.3 m/s². These are manufacturer-declared values, not independent measurements. They are relevant when assessing the work environment and exposure; consult the manual and applicable workplace guidance for safe operation and exposure controls.
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Who should consider the CAT154?
The CAT154 is most relevant to buyers who need a 1-inch-drive pneumatic wrench for large vehicle work and whose air system can support its specified pressure, airflow and hose requirements. Before choosing it, check:
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- Whether the job calls for a 1-inch drive and compatible impact sockets.
- Whether the tool’s 17.2 kg mass and dimensions are workable in the intended positions.
- Whether the actual reach suits the job; clarify the conflicting 720 mm anvil claim.
- Whether the air system can deliver suitable airflow at working pressure through compatible hose and fittings.
- Whether the published maximum torque rating is being compared with equivalent manufacturer ratings, rather than with independently measured performance figures.
The surfaced product information does not say that sockets are included. Confirm package contents with the seller before purchase if sockets or accessories are essential.
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Safety and manual
Clarke’s manual contains safety, compressed-air, before-use, operation, maintenance and troubleshooting sections. Read the complete manual for the instructions that apply to the tool and your setup; the published specification information alone does not establish lubrication intervals, detailed PPE requirements or operating procedures. Clarke’s introduction says: “Please read all of the safety and operating instructions carefully before using this product.”
Verdict
The Clarke X-PRO CAT154 is a substantial 1-inch-drive pneumatic wrench with a high published maximum torque rating and specifications aimed at heavy commercial-vehicle work. Its practical fit depends on having the right air delivery and connections, being able to handle a 17.2 kg tool, and confirming that its reach matches the job. Treat the 3,800 Nm figure as Clarke’s maximum rating—not a tested outcome—and resolve the 720 mm anvil discrepancy before buying on the strength of that claim.
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