Pistol grip nutrunners in P-form

P Series — Cleco Pistol Grip Torque Screwdrivers

The P Series from Cleco includes the pistol grip torque screwdriver models 19PCA, 19PTA, and 19PTS. Designed for industrial fastening processes, these tools combine a compact pistol grip layout with precise torque control, robust connections, and versatile start types (push-to-start, lever-start, direct drive). Primary application areas include series production, assembly of sheet metal and frame components, as well as gearbox and engine assembly, where ergonomic angles, repeatability, and low vibrations are crucial.

Design and Construction

The pistol grip form of the P Series reduces arm rotation angles and enables an ergonomic grip for longer shifts. Housing materials are corrosion-resistant aluminum alloys with wear-resistant surface coatings; in areas with increased chemical exposure, the variant with additional surface coating or corrosion protection option is recommended. The direct drive of the 19PTS minimizes play and torque losses, while the 19PCA and 19PTA variants are designed with integrated start mechanisms for different operating concepts. The arrangement of the air connection, trigger/lever, and bit holder has been designed for quick, tool-free bit changes.

Connections, Air Supply, and Seals

Cleco's P Series utilizes standardized compressed air connections (1/4" NPT or ISO-G depending on the market) with optimized air paths to minimize pressure losses. For consistent torque output, the air supply must be clean, dry, and filtered; recommended operating pressure typically ranges between 3.5 and 6.3 bar – exact values depend on the model and set torque range. To ensure a long service life, the tools are equipped with high-quality O-rings and synthetic seals (NBR or, upon request, FKM for higher temperatures/chemical resistance). For applications in oil- or petrochemical-laden environments, special sealing options are available that offer higher resistance to solvents.

Torque, Control, and Start Types

The P Series covers a wide torque range; electronically supported models allow fine adjustment of the shut-off or slip clutch parameters. Push-to-start is suitable for controlled cycle time processes where operator force and position are standardized. Lever-start increases process speed with potentially varying insertion heights, useful in work sequences with automatic feeding. Direct drive is used when minimal angular deviations and maximum power transmission are required. In the production line, the tools can be integrated both manually and in combination with holding fixtures and feed units for automated feeding.

Materials of Inserts and Bit Holders

Cleco uses hardened steels for drives and holders; tempered precision components reduce runout errors. Bit holders and extensions are available in various lengths and with 1/4" hex drive; for high-precision applications, pluggable, backlash-free quick-change holders are available. For special corrosion requirements, inserts made of stainless steels (AISI 300/400 series) or surface finishes such as phosphating or nickel plating exist.

Sealing and Lubrication Concepts

The P Series uses a combination of dynamic shaft seals on the main shaft and static O-rings at connection points. The lubrication concept is based on metered air-oil additives or internal lubrication chambers with multi-grade oil compatible with the unit; for clean production environments, separate external lubrication is recommended to avoid oil release during assembly. In sensitive electronics assembly, a closed, grease-tight bearing design without air-oil addition can be chosen.

Application Fields and Process Integration

The P Series is optimized for short to medium-length tightening cycles, ideal for fastening applications requiring high repeatability. Typical applications include panel and chassis fastenings in mechanical engineering, assembly of sheet metal parts in commercial vehicle production, and fastenings in drive technology. The tools can be integrated into existing assembly lines, both in manual workstations and as part of holding and feeding systems. Interfaces to industrial plants are realized via standardized holders, silencers on the air connection, and optional electronic torque monitoring.

Practical Examples

Example 1: Assembly of a Gearbox Cover A production station for gearbox covers uses the 19PTS with direct drive to fasten ten M6 screws with identical torque in a defined sequence cycle. The tool holder is fixed in a positioning station, and the dwell time per screw is 1.5 seconds. The backlash-free direct drive reduces scrap due to loose connections and eliminates rework. Example 2: Vehicle Interior Assembly On the assembly line for vehicle interiors, the 19PCA with push-to-start is used. Operators position the clip and screw; the push-to-start prevents false triggers and ensures exact shut-off points with varying insertion hole play. Air supply is via a central pipeline with an inline filter and oil mist lubricator; lubrication intervals are specified by production control. Example 3: Series Fastening in Electric Motor Assembly The 19PTA with lever-start is mounted in a semi-automatic station where screws are supplied via a vibratory feeder system. Lever-start reduces cycle times with varying component heights. Additionally, a torque sensor is interposed to detect faulty fastenings and report the process to the PLC.

Maintenance and Spare Parts

Regular inspection of O-rings, shaft seals, and air connections reduces unplanned downtime. Spare part kits include standardized seal sets, springs, regulated drive elements, and bit holders. Calibration intervals for torque-critical applications should be documented and integrated into production maintenance planning. For detailed maintenance plans and exploded views, please refer to manufacturer documentation and the technical section of your operating manuals.

Compatibility and Accessories

The P Series is compatible with common bit profiles and quick-release chucks. Optional accessories include mounting brackets, silencers for air connections, torque monitoring sensor boxes, and various extensions. For electrical or electronic process integration, interfaces to MES and PLC systems are available to directly log fastening actions, cycles, and error events.

Further Information

Technical details, complete specification sheets, and material data sheets can be found in the technical section: https://maku-industrie.de/technik. Practical examples and application cases from other industrial customers are documented here: https://maku-industrie.de/anwendungsbeispiele. * Recommendation: Before selection, define the exact torque requirements, environmental conditions, and line interfaces; based on this, select the model (19PCA/19PTA/19PTS), seal type, and lubrication concept.

FAQs

1. Which start type is suitable for my process? Choose push-to-start for manual, precise operations with standardized operator guidance, lever-start for variable component heights and fast feeding, and direct drive when minimal play and angular deviations are required. 2. Which seals and lubricants are compatible? Standard seals are NBR O-rings and shaft seals; FKM options are available for increased temperature or chemical resistance. Lubrication is via air-oil additive or closed lubrication chambers; for clean assembly environments, closed or external lubrication concepts are recommended. 3. How do I integrate the Cleco P Series into an automated production line? Integration is achieved via mechanical holding fixtures, standardized air connections, and optional electronic torque or counting sensors that communicate with the PLC/MES. Define air pressure, filtration, lubrication strategy, and calibration intervals, and use holding fixtures for reproducible workpiece positioning if necessary.