--- title: LF-Series Brushless Electric Screwdrivers – FAQ & User Guide description: Learn about the Mountz LF-Series brushless electric screwdrivers, including available models, torque ranges, setup, compatible accessories, maintenance, and applications for precision low-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/lf-series-brushless-electric-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) # LF-Series Brushless Electric Screwdrivers – FAQ & User Guide ## The Mountz LF-Series Brushless Electric Screwdrivers are designed for low-torque precision fastening applications that require accuracy, reliability, and long tool life. Featuring Swiss Maxon brushless motors, adjustable torque, and ESD-safe construction, the LF-Series delivers consistent fastening performance while reducing maintenance requirements. Available in lever-start and push-to-start configurations, the LF-Series is commonly used in electronics, medical device, aerospace, and industrial assembly applications. ### Quick Answer The LF-Series is a line of brushless electric clutch screwdrivers designed for precision assembly applications requiring accurate, repeatable torque control. Powered by Swiss Maxon brushless motors, the LF-Series provides continuous-duty performance, adjustable torque settings, ESD-safe operation, and long motor life for low-torque production fastening applications. --- ### Who This Is For - Manufacturing engineers - Process engineers - Quality engineers - Assembly operators - Electronics manufacturers - Medical device manufacturers - Aerospace manufacturers - Industrial assembly facilities --- ### When Should You Use This? **Use the LF-Series when:** - Low-torque precision fastening is required - Repeatable torque control is critical - High-volume production is performed - ESD-safe tools are required - Long motor life and reduced maintenance are important - Continuous-duty operation is needed - Electronics or medical assemblies require precise fastening --- ### When Should You NOT Use This? **The LF-Series may not be the best choice when:** - Medium- or high-torque applications are required - Torque and angle traceability is needed - Fastening data collection is required - Advanced process control or error-proofing is necessary - A cordless screwdriver is preferred For smart fastening applications with torque and angle monitoring, consider the Mountz ECT-Series or EPT-Series. --- ### How the LF-Series Works The LF-Series uses a high-performance Swiss Maxon brushless motor to drive a precision automatic shut-off clutch. **During operation, the screwdriver:** - Delivers consistent torque output - Automatically disengages when the preset torque is reached - Reduces motor wear through brushless technology - Allows external torque adjustment - Supports continuous-duty production fastening **Result:** - Accurate torque control - Improved fastening consistency - Reduced maintenance - Longer motor life - Increased production efficiency --- ### Core Features - Swiss Maxon brushless motor - Precision automatic shut-off clutch - External torque adjustment - Lever-start and push-to-start models - ESD-safe construction - Continuous-duty operation - Compatible with Scout Screw Counter - Long motor life - Reduced maintenance requirements - Requires STC40 or FT-30D transformer --- ### Configuration Options - Lever-start models - Push-to-start models - External torque adjustment - Compatible with Scout Screw Counter - ESD-safe models - STC40 Transformer - FT-30D Mini Transformer --- ### Available Models The LF-Series includes eight brushless electric screwdrivers designed for precision, low-torque fastening applications. Models are available in both lever-start and push-to-start configurations and share the same ergonomic grip and 1/4" female hex drive. ##### LF-Series Model Chart | Model | Item Number | Start Type | Torque Range | RPM | Drive Size | Screw Capacity | | --- | --- | --- | --- | --- | --- | --- | | LF060-A ESD | 145897 | Lever Start | 0.8–5.2 lbf.in | 1550 | 1/4" Female Hex | Small precision fasteners | | LF060P-A ESD | 145898 | Push-to-Start | 0.8–5.2 lbf.in | 1550 | 1/4" Female Hex | Small precision fasteners | | LF080-A ESD | 145891 | Lever Start | 1.7–6.9 lbf.in | 1250 | 1/4" Female Hex | Precision assembly | | LF080P-A ESD | 145892 | Push-to-Start | 1.7–6.9 lbf.in | 1250 | 1/4" Female Hex | Precision assembly | | LF120-A ESD | 145893 | Lever Start | 2.6–10.4 lbf.in | 1000 | 1/4" Female Hex | General electronics assembly | | LF120P-A ESD | 145894 | Push-to-Start | 2.6–10.4 lbf.in | 1000 | 1/4" Female Hex | General electronics assembly | | LF180-A ESD | 145895 | Lever Start | 3.5–15.6 lbf.in | 700 | 1/4" Female Hex | Higher-torque precision assembly | | LF180P-A ESD | 145896 | Push-to-Start | 3.5–15.6 lbf.in | 700 | 1/4" Female Hex | Higher-torque precision assembly | --- ### Model Selection Guide | If you need... | Recommended Model | | --- | --- | | Lowest torque applications | LF060 Series | | Precision electronics assembly | LF080 Series | | General production assembly | LF120 Series | | Highest torque capacity | LF180 Series | | Lever-start operation | LF060-A, LF080-A, LF120-A, LF180-A | | Push-to-start operation | LF060P-A, LF080P-A, LF120P-A, LF180P-A | --- ### Compatible Accessories | Accessory | Item Number | Purpose | | --- | --- | --- | | STC40 Transformer | 145754 | Standard power supply | | FT-30D Mini Transformer | 145870 | Compact power supply | | Torque Cover | 145823 | Prevents accidental torque adjustment | | Scout Screw Counter | Compatible | Screw counting applications | --- ### Compatible Transformers The LF-Series requires either an STC40 Transformer or FT-30D Mini Transformer for operation. | Model | Item Number | Purpose | | --- | --- | --- | | STC40 Transformer | 145754 | Standard power supply | | FT-30D Mini Transformer | 145870 | Compact power supply | --- ### Setup & Adjustment 1. Connect the LF-Series screwdriver to either the STC40 Transformer or FT-30D Mini Transformer. 2. Install the appropriate driver bit. 3. Adjust the external torque setting for the application. 4. Verify the torque setting using a calibrated torque analyzer before production. 5. Install the optional Torque Cover if protection against accidental torque adjustment is required. 6. Connect the Scout Screw Counter if screw counting is part of the assembly process. 7. Perform sample fastenings and make final torque adjustments before beginning production. ### Common Applications **The LF-Series is commonly used in:** - Electronics assembly - Medical device manufacturing - Aerospace assembly - Telecommunications equipment assembly - Industrial product assembly - Precision manufacturing - General production environments requiring low-torque fastening --- ### Use Cases (Real-World Examples) #### Electronics Assembly **Problem:** Precision electronic assemblies require accurate, repeatable low-torque fastening to prevent damage to sensitive components. **Solution:** The LF-Series provides precise automatic shut-off clutch operation and repeatable torque control for delicate assembly applications. #### Medical Device Manufacturing **Problem:** Medical products require consistent fastening while minimizing maintenance and downtime. **Solution:** The Swiss Maxon brushless motor delivers long service life and reliable fastening performance in continuous production environments. #### High-Volume Production **Problem:** Production tools must operate continuously with minimal maintenance while maintaining fastening accuracy. **Solution:** The brushless motor design eliminates brush wear, reducing maintenance requirements while supporting continuous-duty operation. #### ESD-Sensitive Manufacturing **Problem:** Electrostatic discharge can damage sensitive electronic components during assembly. **Solution:** All LF-Series models feature ESD-safe construction to help protect sensitive products and improve manufacturing quality. --- ### 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 debris. - Inspect the power cable and transformer before operation. - Periodically verify torque settings as part of your preventive maintenance program. - Replace worn screwdriver bits to maintain fastening accuracy. --- ### Integration & Advanced Features - High-performance Swiss Maxon brushless motor - Precision automatic shut-off clutch - External torque adjustment - Continuous-duty operation - Reduced maintenance requirements - Long motor life - Compatible with Scout Screw Counter - ESD-safe construction - Operates with either the STC40 Transformer or FT-30D Mini Transformer - Designed for precision production fastening applications --- ### Media & Supporting Content                                                                         ![lf120a-145893\_01.mainview](https://mountztorque.com/hs-fs/hubfs/lf120a-145893_01.mainview.jpg?width=500&height=500&name=lf120a-145893_01.mainview.jpg) - 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