Order non-shut-off Cleco PHH impulse nutrunners instantly

Order Cleco PHH Impulse Wrenches without Shut-off directly

Cleco PHH impulse wrenches without shut-off from Apex Tool Group are designed for industrial assembly processes where constant impulse power and repeatability are more important than automatic shut-off upon reaching a target torque. These tools offer consistent tightening behavior, robust construction, and maintenance-friendly components that have proven themselves in series production, maintenance, and testing. On this page, you will find the relevant selection of versions by torque, idle speed, connection type, and housing material, as well as information on operating conditions, sealing variants, and spare parts.

Technical Overview and Designs

Cleco PHH impulse wrenches are available as handheld piston or bent-axis models, with variants featuring straight housings and angled designs. Typical designs differ in length, weight, and drive shaft. The drive shaft is available in common 1/2" or 3/8" square drives; special models use 6.35 mm hex drives for screw bits. The housing is predominantly made of die-cast aluminum or glass-fiber reinforced composite material to achieve a balance between strength and weight. Piston motors offer high impulse rates at medium torque, while robust direct drives in PHH variants provide increased service life under high shock loads.

Performance Specifications and Selection Criteria

When selecting a non-shutdown impulse wrench, two primary parameters are decisive: the adjustable maximum torque and the idle speed. Cleco PHH models cover a spectrum from low torques for sensitive assemblies to high torques for coarse fastenings. The idle speed influences the time it takes to reach the set torque and thus the cycle time in production. Choose a combination of torque reserve and idle speed that ensures the minimum necessary process margin and maximum repeatability. Also, pay attention to the impulse frequency and the design of the impact mechanism, as these factors determine the tightening behavior and the vibrations generated.

Connections, Air Requirement, and Regulation

Cleco PHH impulse wrenches are air-powered and require regulated pressure as well as a clean, oil-free compressed air supply. Common connections include 1/4" and 3/8" NPT or BSP threaded connections, as well as quick couplings according to industrial standards. The specified air consumption varies with torque and impulse rate; typical values range from 10 to 30 l/s at 6.0 bar. For precise process integration, speed and torque-adjustable variants are available, some with torque-dependent control via external pneumatic valves or mechanical adjusting rings. On the installation side, ensure correctly dimensioned compressed air lines, condensate separators, and fine filters so that dirt and moisture do not attack the internal pneumatic components.

Seals, Lubrication, and Maintenance

The service life of impulse wrenches largely depends on the seals used and lubrication. Cleco uses high-quality fluorocarbon rubber or NBR seals in PHH models, depending on temperature and media requirements. For elevated temperatures or contact with solvents, FKM seals are preferable. Lubrication is usually done via compressed air oilers or by regular manual application of finely dosed pneumatic oil. Maintenance intervals depend on operating hours and environmental conditions; typical intervals include inspections of impact mechanism components, replacement of seals, and cleaning of the air filter every 3–6 months. Spare parts such as impact pins, return springs, and O-rings are standardized and should be kept as a spare kit to minimize downtime.

Materials, Surfaces, and Screw Connections

For reliable connections with Cleco PHH impulse wrenches, knowledge of the materials used is crucial. Aluminum alloys require low torques and soft seals, while high-strength steels and hardened threads require higher impulse energy. For screw connections with thread coatings (e.g., zinc, zinc-nickel, PTFE-coated), the target torque must be adjusted taking into account the friction coefficients. For sealing applications in containers or pipe connections, suitable flange seals (e.g., NBR, EPDM, PTFE) and controlled tightening torques must be observed to prevent leaks and minimize material deformation. For multi-point fastenings, a sequential tightening strategy is recommended to achieve uniform surface pressure.

Practical Application Examples

Example 1: Assembly of an aluminum car body outer skin. In a production cell, a Cleco PHH with low idle speed and fine impulse gradation is used to set rivet screws with reproducible tightening depth behavior, even for large batch sizes. The tool is equipped with a 3/8" drive and a longer bit extension to reach hard-to-access areas. For process stability, an inline fine filter is installed, and the compressed air is supplied with 0.5% oil.

Example 2: Assembly of steel frames in mechanical engineering production. Here, a PHH model with high impulse torque and a robust impact mechanism is used. M8 to M16 screws are set with a defined number of impulses to avoid thread overload. The workshop operates with 6.0 bar regulated pressure and uses pre-stocked spare seal kits to allow for short service intervals at the end of a shift.

Example 3: Maintenance of pipelines in a chemical plant. Due to the risk of corrosion and contamination, models with FKM seals are used, and screw connections are fastened with PTFE-coated nuts. The impulse wrench is selected to provide reproducible flange pressure values, preventing overstressing of sealing surfaces.

Integration into Manufacturing Processes and Quality Control

For integration into manufacturing processes, interfaces for process monitoring and ergonomics are crucial. Cleco PHH models can be combined with holders, angle adapters, and bit magazines in assembly workstations. For quality assurance, a combination with torque documentation systems or signal transmitters that log impulse count and air pressure is recommended. Workpieces with high variant diversity benefit from modular sets where drive reception, bit length, and silencer can be quickly changed. The reduction of reaction torque improves occupational safety and reduces repetitive errors during manual operation.

Procurement, Spare Parts, and Accessories

When ordering directly, note the variant designations: item number, torque range, idle speed, drive size, and possible accessories such as silencers, extensions, bits, and quick couplings. Stock spare parts kits with seals, springs, and impact pins. For technical data, product comparisons, and application notes, we refer to the manufacturer's pages and practical documents, for example, the technology page: https://maku-industrie.de/technik and specific application examples: https://maku-industrie.de/anwendungsbeispiele.

What to Consider When Ordering and Using

Ensure compatibility between the screw, nut, and drive system. Before ordering, check the required torque ranges and the air connection type. Plan a maintenance concept with defined intervals for seal and impact mechanism replacement. Also, consider ambient temperatures, as extreme heat or cold can affect the material selection of the seals and lubrication intervals.

Short Checklist Before Purchase:

• Check desired torque range, idle speed, drive size, and air connection.

FAQs

1. Why should I choose a Cleco PHH impulse wrench without shut-off?

If your process requires constant impulse energy and reproducible tightening behavior without the tool shutting off upon reaching a specific torque, a PHH without shut-off offers more stable results for multi-point fastenings and applications with varying friction coefficients.

2. Which seals and lubricants are recommended for PHH models?

For standard applications, NBR or FKM seals are common; for high temperatures or chemical exposure, FKM. Lubrication is done via metering oil in the compressed air or regular manual oil supply; use special pneumatic oils for this, not multi-grade gear oils.

3. How do I integrate documentation-required screwing processes with Cleco PHH?

For documentation-required processes, combine the PHH with external measurement and acquisition systems that log air pressure, impulse count, and timestamps. Alternatively, signal transmitters can be attached to the air supply or mechanical switches to electronically record each action cycle.