Built for controlled fastening on light-to-medium production assemblies, the Cleco 15STHC40Q Shut-Off Model Hydraulic Pulse Nutrunner delivers a 3.6–11 ft-lbs torque range with a 1/4" quick change drive for bit-based assembly work on M5 to M8 fasteners. Its hydraulic pulse shut-off system (a fluid-driven pulse mechanism that automatically stops the tool at the set torque) helps reduce reaction force compared with conventional impact tools, making it useful for repetitive fastening where consistency and operator control matter.
The inline lever configuration keeps the tool aligned with the fastener for straight, controlled rundown, while the 3,000 RPM free speed supports fast cycle times on production stations. With external torque adjustment, external speed control, reversible operation, and oilless blades, the 15STHC40Q is well suited for assembly lines, repair cells, and manufacturing environments that need repeatable fastening without the high reaction kick of larger nutrunners.
Type: Hydraulic Pulse Nutrunner | Series: C-Series STHFC & STHF | Model: 15STHC40Q | Grip Type: Inline Lever | Drive Size: 1/4" | Drive Type: Quick Change | Torque Range: 3.6–11 ft-lbs / 5.0–15 Nm | Free Speed: 3,000 RPM | Weight: 2.4 lbs / 1.1 kg | Air Inlet: 1/4" NPT | Minimum Hose I.D.: 3/8" | Air Consumption: 16.5 SCFM | Rated Air Pressure: 87 PSI / 6 bar | Bolt Size Range: M5–M8 / #10–3/8"
Features:
- Hydraulic pulse shut-off helps stop the tool at the preset torque for repeatable fastening.
- Motor governor equipped to help regulate speed during rundown.
- External torque adjustment allows setup changes without opening the tool housing.
- External speed control helps tune rundown behavior for hard joints such as metal-to-metal assemblies.
- Reversible operation supports both tightening and fastener removal.
- Oilless blades reduce routine lubrication requirements inside the motor section.
- Inline lever start provides controlled activation while keeping the tool aligned with the fastener.
- Standard equipment includes suspension bail and torque adjusting wrench.
Made in USA: 
Applications:
- Automotive assembly stations fastening brackets, interior components, small housings, and M5 to M8 hardware.
- Electronics and appliance manufacturing where repeatable torque and low reaction force are important for operator-paced work.
- General industrial production lines running small bolts, screws, and threaded fasteners with quick change bits.
- Maintenance and repair cells that need a compact inline pulse tool for controlled assembly and removal tasks.
- Fixture-based or suspended tool stations using the included suspension bail to help manage tool weight during repeated cycles.
FAQs:
- Q: What does hydraulic pulse shut-off mean?
A: Hydraulic pulse shut-off means the tool delivers torque through a pulse unit and automatically shuts off when the preset torque is reached. This helps reduce reaction force and supports more repeatable fastening than a non-shut-off pulse tool. - Q: What fastener sizes is the Cleco 15STHC40Q intended for?
A: The catalog lists the C-Series STHFC and STHF range for M5 to M8 fasteners, or #10 to 3/8" bolt sizes. Always match the tool torque setting, bit, and joint condition to the actual assembly requirement. - Q: What is the difference between a quick change drive and a square drive?
A: A quick change drive is used with insert bits and bit holders for screw and small fastener assembly. A square drive is used with sockets; this model is the 1/4" quick change version. - Q: Can the torque be adjusted on this model?
A: Yes. The 15STHC40Q has external torque adjustment, and the standard equipment includes a torque adjusting wrench. Final torque should be verified with appropriate torque testing equipment before production use. - Q: What air supply does this tool require?
A: The tool is rated at 87 PSI / 6 bar and lists 16.5 SCFM air consumption with a 1/4" NPT air inlet and 3/8" minimum hose I.D. Use a properly sized air line and FRL to maintain consistent tool performance.
| SKU | Output Drive | Torque Range | Free Speed | Weight | Air Consumption | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Min Ft Lb | Max Ft Lb | Min Nm | Max Nm | r/min | Lb | NPT | Hose I.D. | Scfm | ||
| 15STHC40Q | 1/4“ Quick Change | 5 | 15 | 3000 | 2.43 | 1/4 | 3/8 | 0.1 | ||
| 15STHFC40Q | 1/4“ Quick Change | 3.6 | 11 | 5 | 15 | 4000 | 2.43 | 1/4 | 3/8 | 0.1 |
| 35STHFC404 | 1/2“ Square Drive | 12 | 26 | 12 | 35 | 4000 | 3.31 | 1/4 | 3/8 | 1.5 |
| 35STHFC40Q | 7/16“ Quick Change | 12 | 26 | 15 | 35 | 4000 | 3.31 | 1/4 | 3/8 | 1.5 |
| 7STHFC55Q | 1/4“ Quick Change | 1.9 | 4.9 | 2.6 | 6.6 | 5500 | 2.05 | 1/8 | 3/8 | 7 |
Looking for more information about Cleco Nutrunner? Click here to view the Catalog.
Need help selecting the correct Cleco Nutrunners 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
