--- title: CL-Series Electric Torque Screwdrivers – FAQ & User Guide description: Learn about the Mountz CL-Series electric torque screwdrivers, including available models, torque ranges, setup, compatible accessories, maintenance, ESD options, and applications for precision medium- to high-torque production fastening. --- - Chat - [Contact Us](https://go.mountztorque.com/contact-us?_gl=1*1t1uhd0*_gcl_au*MjMwOTIyMTI2LjE2ODU1OTU4Mjc.&_ga=2.126080644.843342068.1685595827-2758410.1685595827&hsLang=en-us) - [Sign in](https://www.mountztorque.com/secure/checkout.ssp?is=login&login=T&fragment=login-register&hsLang=en-us) - [![mountztorque](https://mountztorque.com/hubfs/MO18001_Logo_H_Color_Tag_RGB.svg)](https://www.mountztorque.com/?hsLang=en) - North America:[(408) 850-9978](tel:4088509978) - International:[+44 1428 741756](tel:441428741756) - [Shop Products](https://www.mountztorque.com/Product-Type) - [Learning Center](https://www.mountztorque.com/Learning-Center) - [About Us](https://www.mountztorque.com/about-us) - [Service and Calibration](https://go.mountztorque.com/usa-service?_gl=1*1itcg2n*_gcl_au*MjMwOTIyMTI2LjE2ODU1OTU4Mjc.&_ga=2.172874026.843342068.1685595827-2758410.1685595827) [![Mountz\_Assets\_ConversionCalculator\_white](https://mountztorque.com/hubfs/Mountz_Assets_ConversionCalculator_white.svg) Conversion Calculator](https://www.mountztorque.com/torque-conversion-calculator?hsLang=en) [![Mountz\_Assets\_TorqueToolFinder\_white](https://mountztorque.com/hubfs/Mountz_Assets_TorqueToolFinder_white.svg) Torque Tool Finder](https://www.mountztorque.com/torque-conversion-calculator?hsLang=en) [Skip to content](https://mountztorque.com/en-us/knowledge-base/cl-series-electric-torque-screwdrivers-faq#main-content) English - United States Show submenu for translations ![vast.png](https://mountztorque.com/hs-fs/hubfs/Mountz%20Logo%20-%20HS.png?width=413&height=135&name=Mountz%20Logo%20-%20HS.png) - [Sample Contact Page](https://5139817.hs-sites.com/sample-contact) - [Sample About Page](https://5139817.hs-sites.com/sample-about) - [Default HubSpot Blog](https://mountztorque-5139817.hs-sites.com/blog) Open main navigation Close main navigation - [Sample Contact Page](https://5139817.hs-sites.com/sample-contact) - [Sample About Page](https://5139817.hs-sites.com/sample-about) - [Default HubSpot Blog](https://mountztorque-5139817.hs-sites.com/blog) - English - United States Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Mountz Torque Knowledge Base](https://mountztorque.com/en-us/knowledge-base?hsLang=en-us) 2. [Product Overviews](https://mountztorque.com/en-us/knowledge-base/product-overviews?hsLang=en-us) 3. [Electric Screwdrivers](https://mountztorque.com/en-us/knowledge-base/product-overviews?hsLang=en-us#electric-screwdrivers) # CL-Series Electric Torque Screwdrivers – FAQ & User Guide ## The Mountz CL-Series Electric Torque Screwdrivers are designed for medium- to high-torque production fastening applications that require accuracy, repeatability, and reliable performance. Featuring a precision automatic shut-off clutch, adjustable torque settings, and multiple start configurations, the CL-Series delivers consistent fastening performance for electronics, aerospace, automotive, and industrial assembly applications. ### Quick Answer The CL-Series is a line of low-voltage DC electric clutch screwdrivers designed for precision production fastening applications requiring accurate, repeatable torque control. Featuring a precision automatic shut-off clutch, adjustable torque settings, lever-start and push-to-start configurations, and optional ESD models, the CL-Series delivers dependable fastening performance across a wide range of torque requirements. --- ### Who This Is For - Manufacturing engineers - Process engineers - Quality engineers - Assembly operators - Automotive manufacturers - Aerospace manufacturers - Electronics manufacturers - Industrial assembly facilities --- ### When Should You Use This? **Use the CL-Series when:** - Medium- to high-torque fastening is required - Repeatable torque control is critical - High-volume production fastening is performed - Adjustable torque settings are needed - Continuous production operation is required - ESD-safe models are required for static-sensitive environments - Higher torque capacity is needed than smaller electric screwdrivers can provide --- ### When Should You NOT Use This? **The CL-Series may not be the best choice when:** - Ultra-low torque fastening is required - Torque and angle traceability are needed - Programmable fastening strategies are required - Fastening data collection is required - A cordless screwdriver is preferred For programmable fastening strategies and torque-angle monitoring, consider the Mountz ECT-Series or EPT-Series. --- ### How the CL-Series Works The CL-Series uses a low-voltage DC motor to drive a precision automatic shut-off clutch. **During operation, the screwdriver:** - Delivers repeatable torque output - Automatically shuts off when the preset torque is reached - Allows external torque adjustment - Supports continuous production fastening - Improves fastening consistency across repetitive assembly operations **Result:** - Accurate torque control - Consistent fastening quality - Reduced operator fatigue - Improved production efficiency - Reliable assembly performance --- ### Core Features - Precision automatic shut-off clutch - External torque adjustment scale - Low-voltage DC operation - Lever-start and push-to-start models - ESD-safe models available - Wide torque range from **0.17–69 lbf.in** - Compatible with 4 mm HIOS and 1/4" female hex drive bits (model dependent) - Requires a compatible transformer (power supply) - CL9000 models include a shockless reaction stand for high-torque applications --- ### Configuration Options | Configuration | Best For | | --- | --- | | Lever Start | Standard production fastening | | Push-to-Start | Repetitive assembly applications | | ESD Models | Static-sensitive electronics manufacturing | | High-Torque Models | Heavy-duty production fastening | --- ### Available Models The CL-Series includes multiple electric torque screwdrivers covering torque ranges from **0.17 to 69 lbf.in (2–780 cN·m)**. Models are available in lever-start, push-to-start, and ESD configurations to support a wide range of production fastening applications. **CL-Series Model Chart** | Model | Item Number | Driver Type | Torque Range | RPM (30V / 20V) | Drive Size | | --- | --- | --- | --- | --- | --- | | CL2000 | 144103 | Lever Start | 0.17–1.7 lbf.in (2–20 cN·m) | 680 / 490 | 4 mm HIOS | | CL2000ESD | 144097 | Lever Start (ESD) | 0.17–1.7 lbf.in (2–20 cN·m) | 680 / 490 | 4 mm HIOS | | CL3000 | 144106 | Lever Start | 0.3–1.7 lbf.in (3–20 cN·m) | 1000 / 670 | 4 mm HIOS | | CL3000ESD | 144098 | Lever Start (ESD) | 0.3–1.7 lbf.in (3–20 cN·m) | 1000 / 670 | 4 mm HIOS | | CL4000 | 144110 | Lever Start | 0.9–4.8 lbf.in (10–55 cN·m) | 1000 / 690 | 1/4" Female Hex | | CL4000PS | 144108 | Push-to-Start | 0.9–4.8 lbf.in (10–55 cN·m) | 1000 / 690 | 1/4" Female Hex | | CL4000ESD | 144099 | Lever Start (ESD) | 0.9–4.8 lbf.in (10–55 cN·m) | 1000 / 690 | 1/4" Female Hex | | CL6000 | 144116 | Lever Start | 1.7–8.8 lbf.in (20–100 cN·m) | 800 / 500 | 1/4" Female Hex | | CL6000PS | 144119 | Push-to-Start | 1.7–8.8 lbf.in (20–100 cN·m) | 800 / 500 | 1/4" Female Hex | | CL6000ESD | 144320 | Lever Start (ESD) | 1.7–8.8 lbf.in (20–100 cN·m) | 800 / 500 | 1/4" Female Hex | | CL6500 | 144121 | Lever Start | 2.6–14 lbf.in (30–160 cN·m) | 900 / 600 | 1/4" Female Hex | | CL6500PS | 144120 | Push-to-Start | 2.6–14 lbf.in (30–160 cN·m) | 900 / 600 | 1/4" Female Hex | | CL6500ESD | 144100 | Lever Start (ESD) | 2.6–14 lbf.in (30–160 cN·m) | 900 / 600 | 1/4" Female Hex | | CL7000 | 144126 | Lever Start | 2.6–22 lbf.in (30–250 cN·m) | 750 / 500 | 1/4" Female Hex | | CL7000PS | 144125 | Push-to-Start | 2.6–22 lbf.in (30–250 cN·m) | 750 / 500 | 1/4" Female Hex | | CL7000ESD | 144101 | Lever Start (ESD) | 2.6–22 lbf.in (30–250 cN·m) | 750 / 500 | 1/4" Female Hex | | CL7000 | 144182 | High-Torque Version | 2.6–24 lbf.in (30–271 cN·m) | 550 | 1/4" Female Hex | | CL9000PS | 144130 | Push-to-Start | 10–43 lbf.in (120–500 cN·m) | 330 | 1/4" Female Hex | | CL9000PS-HT | 144265 | Push-to-Start | 17–69 lbf.in (192–780 cN·m) | 350 | 1/4" Female Hex | --- ### Model Selection Guide | If you need: | Recommended Model | | --- | --- | | Ultra-low torque precision assembly | CL2000 or CL3000 | | Electronics assembly | CL4000 Series | | Light-duty production fastening | CL6000 Series | | Medium-torque production | CL6500 Series | | Higher torque fastening | CL7000 Series | | Maximum torque capacity | CL9000PS-HT | | Push-to-start operation | Any PS model | | ESD-safe production | Any ESD model | --- ### Compatible Accessories | Accessory | Purpose | | --- | --- | | Compatible Transformer | Required power supply | | Coiled Cord | Connects screwdriver to transformer | | Right Angle Adapter | Access confined fastening locations | | Pistol Grip | Improves ergonomics | | Push-to-Start Adapter | Converts compatible models | | Vacuum Adapter Kit | Supports vacuum pickup applications | --- ### Transformer The CL-Series requires a compatible transformer (power supply) for operation. Select the transformer based on the screwdriver model and application requirements. Refer to the transformer documentation for compatibility information. --- ### Setup & Adjustment 1. Connect the CL-Series screwdriver to a compatible transformer. 2. Install the appropriate driver bit for the application. 3. Adjust the external torque setting using the torque adjustment scale. 4. Verify torque output using a calibrated torque analyzer before production. 5. Perform sample fastenings and make final torque adjustments before beginning production. 6. For CL9000 models, ensure the shockless reaction stand is properly installed before operation. 7. Periodically verify torque output as part of your quality control program. ### Common Applications **The CL-Series is commonly used in:** - Electronics assembly - Automotive manufacturing - Aerospace assembly - Industrial equipment manufacturing - Appliance assembly - Telecommunications equipment assembly - General production environments requiring medium- to high-torque fastening - Applications requiring ESD protection or screw counting --- ### Use Cases (Real-World Examples) #### Electronics Assembly **Problem:** Precision electronic assemblies require repeatable torque while protecting sensitive components from electrostatic discharge. **Solution:** ESD models provide consistent torque control while helping protect static-sensitive assemblies during production. --- ### Automotive & Industrial Assembly **Problem:** Medium- to high-torque fasteners must be installed consistently throughout repetitive production cycles. **Solution:** The CL-Series delivers accurate torque control with a precision automatic shut-off clutch to improve fastening consistency and product quality. --- ### High-Volume Production **Problem:** Production environments require durable fastening tools capable of continuous operation with reliable torque performance. **Solution:** The CL-Series is designed for heavy-duty production applications and provides dependable fastening performance across a broad torque range. --- ### High-Torque Applications **Problem:** Higher torque fastening can create operator fatigue and torque reaction. **Solution:** The CL9000 models include a shockless reaction stand to improve torque control while reducing torque reaction transmitted to the operator. --- ### Maintenance - Verify torque output regularly using a calibrated torque analyzer. - Inspect the bit holder and drive components for wear or damage. - Keep the screwdriver clean and free of dust and debris. - Inspect the power cord and transformer before operation. - Replace worn screwdriver bits as needed to maintain fastening accuracy. - Periodically verify torque settings as part of your preventive maintenance program. --- ### Integration & Advanced Features - Precision automatic shut-off clutch - External torque adjustment - Low-voltage DC operation - Lever-start and push-to-start configurations - ESD-safe models available - Compatible with the Mountz Scout Screw Counter for additional error-proofing - Compatible with right-angle adapters, pistol grips, vacuum adapters, tool balancers, and ergonomic torque arms - Transformer-powered operation - Designed for heavy-duty production fastening applications --- ### Media & Supporting Content                                     - [CL-Series Product Page](https://www.mountztorque.com/Product-Type/Power-Assembly-Tools/Power-Assembly-Electric-Screwdrivers/Power-Assembly-Clutch-Screwdrivers/Electric-Screwdrivers-CL-Series?hsLang=en-us) - [CL-Series Data Sheet](https://www.mountztorque.com/core/media/media.nl?id=5794923&c=456127&h=45MEmngfmlhG-I4tl15hl3YwJKDgVRq5VdbCBF4VM-yCJOZH&hsLang=en-us) - [CL-Series Operating Manual](https://www.mountztorque.com/core/media/media.nl?id=5743831&c=456127&h=wCr72DpjLVAjBOcyydx70gr5zjvH7QjU3jLo_9wNs-pctRUs&hsLang=en-us) - [CLT-70STC3 Screw Counter Transformer](https://www.mountztorque.com/CLT-70STC3-Screw-Counter-Transformer?quantity=1&hsLang=en-us) - [CLC-60 Transformer](https://www.mountztorque.com/CLC-60-Transformer?quantity=1&hsLang=en-us) - [STC30 Plus Transformer](https://www.mountztorque.com/STC30-Plus-Transformer?quantity=1&hsLang=en-us) --- ### Related Articles / Content - [On-Demand Webinar: How to Select an Electric Screwdriver for Your Manufacturing Process](https://mountztorque.com/en-us/how-to-choose-an-electric-screwdriver-for-precision-assembly-2026?hsLang=en-us) - [Guide: Optimizing Your Assembly Process: Selecting the Right Electric Screwdriver](https://mountztorque.com/optimizing-your-assembly-process-selecting-the-right-electric-screwdriver?hsLang=en-us) - 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