--- title: Insulated Torque Wrenches – FAQ & User Guide description: Learn about Mountz 1000V Insulated Torque Wrenches, including models, torque ranges, drive sizes, insulated construction, setup, calibration, maintenance, and applications for controlled electrical 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/insulated-torque-wrenches-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. [Torque Wrenches](https://mountztorque.com/en-us/knowledge-base/product-overviews?hsLang=en-us#torque-wrenches) # Insulated Torque Wrenches – FAQ & User Guide ## Mountz Insulated Torque Wrenches combine adjustable torque control with nonconductive insulation for electrical fastening applications. Designed for use on electrical systems up to 1,000 volts, these tools help reduce the risk of shorting or shock while providing controlled torque for critical fasteners. ### Quick Answer Mountz Insulated Torque Wrenches are **adjustable click torque wrenches** designed for electrical fastening applications where both controlled torque and electrical protection are required. The wrenches feature nonconductive insulation and are designed for use on electrical systems up to **1,000 volts**. They provide an audible and tactile click when the selected torque is reached, helping operators apply the required torque while reducing the possibility of shorting or shock. The current lineup includes **two models**, both covering **40–180 lbf.in (4–20 N·m)**. The primary difference is drive size: the **SLO1/4I uses a 1/4" square drive**, while the **SLO3/8I uses a 3/8" square drive**. --- ### Who This Is For - Electrical assembly technicians - Manufacturing engineers - Process engineers - Quality engineers - Maintenance technicians - Battery assembly operations - Electrical equipment manufacturers - Industrial electrical assembly - Applications involving electrically live systems - Production environments requiring both torque control and electrical insulation --- ### When Should You Use This? **Use an Insulated Torque Wrench when:** - Fastening is performed on electrical systems up to 1,000 volts - Electrical insulation is required during fastening - Proper torque is critical to the electrical connection - Over-torque conditions need to be controlled - An adjustable torque wrench is preferred - Different torque settings are required within the wrench's range - A square-drive wrench is appropriate for the application - Battery terminals or other electrical connections require controlled torque Mountz specifically designed these wrenches for electrical assembly applications — ranging from low-voltage control wiring to high-voltage power connections up to 1,000 V — where precise torque control and operator safety are critical. --- ### When Should You NOT Use This? **The Insulated Torque Wrench may not be the best choice when:** - Torque requirements fall outside 40–180 lbf.in (4–20 N·m) - A preset production wrench is required - Operators should not be able to change the torque setting - A cam-over or break-over mechanism is preferred - Electronic torque measurement or fastening data collection is required - Torque-angle measurement is required - The tool's insulation is damaged or compromised The wrench's voltage rating does not replace appropriate electrical safety procedures, training, PPE, or applicable workplace requirements. **Note:** The insulation on the wrench body does not insulate the socket or any attached accessories. For full electrical protection in live-work applications, confirm whether insulated sockets and accessories are required by your application and safety procedures. --- ### How the Insulated Torque Wrench Works The wrench combines an adjustable click torque mechanism with insulated construction. **During operation:** - The operator selects the required torque setting. - The appropriate socket is installed on the square drive. - The wrench is positioned on the fastener. - Torque is applied slowly and smoothly. - When the selected torque is reached, the wrench clicks. - The operator stops applying force after the click. The insulated construction helps reduce the possibility of shorting or shock when the tool is used within its intended electrical application. Mountz's operating instructions specify **double insulation with red inner and yellow outer layers** and PVC heat-shrink insulation. **Result:** - Controlled torque for electrical fasteners - Reduced risk of over-tightening - Clear torque indication - Electrical insulation for applicable fastening environments - Improved process control for critical electrical connections --- ### Core Features - Adjustable insulated click torque wrench - Designed for electrical systems up to 1,000 volts - Nonconductive insulation - Double-insulated construction - Red inner and yellow outer insulation layers - PVC heat-shrink insulation - Adjustable torque setting - Square drive design - Audible and tactile click torque indication - Helps reduce the possibility of shorting or shock - Suitable for applications such as battery terminal fastening - Two drive-size options - ISO 6789:2017 accuracy and repeatability requirements at ±4% of setting The Mountz data sheet describes the tools as adjustable square-drive torque wrenches designed to provide torque control while helping prevent shorting, arcing, and other electrical damage. The operating instructions provide the additional double-insulation construction details. --- ### Available Models The current Insulated Torque Wrench lineup includes **two models** with the same torque range but different square drive sizes. #### Insulated Torque Wrench Model Chart | Model | Item # | American Torque Range | S.I. Torque Range | Drive Size | Length | Weight | | --- | --- | --- | --- | --- | --- | --- | | **SLO1/4I** | 060398 | 40–180 lbf.in | 4–20 N·m | 1/4" Sq. Dr. | 8 5/8" | 1.3 lbs | | **SLO3/8I** | 060113 | 40–180 lbf.in | 4–20 N·m | 3/8" Sq. Dr. | 8 5/8" | 1.3 lbs |   --- ### Model Selection Guide | If you need: | Recommended Model | | --- | --- | | 40–180 lbf.in with 1/4" drive | SLO1/4I | | 40–180 lbf.in with 3/8" drive | SLO3/8I | | Smaller square drive configuration | SLO1/4I | | Larger square drive configuration | SLO3/8I | Because both models have the same torque range, selection primarily depends on the **square drive size required for the application and socket configuration**. --- ### Insulation & Electrical Protection The defining feature of these torque wrenches is their insulated construction. **Mountz's SLO operating instructions specify:** - Use on electrical systems up to **1,000 volts** - PVC heat-shrink insulation - Double insulation - Red inner insulation layer - Yellow outer insulation layer - Reduced possibility of shorting or shock - Suitability for applying torque to battery terminals The contrasting insulation layers also provide a practical visual indicator. If the outer insulation becomes damaged enough to expose the inner layer, the tool should be removed from service and evaluated before further use. --- ### Setting the Torque The Insulated Torque Wrench is adjustable, allowing the operator to select the required torque within its **40–180 lbf.in (4–20 N·m)** range. **General setup:** 1. Determine the torque specification for the fastener. 2. Adjust the wrench to the required torque value. 3. Install the appropriate socket onto the square drive. 4. Confirm that the insulation is clean and undamaged. 5. Position the wrench securely on the fastener. 6. Apply force slowly and smoothly. 7. Stop applying force when the wrench clicks. 8. Follow your facility's procedures for storing or resetting the wrench after use. --- ### Calibration & Accuracy Mountz specifies the Insulated Torque Wrenches as designed and manufactured to meet or exceed the accuracy and repeatability requirements of **ISO 6789:2017 at ±4% of setting**. For calibration, Mountz recommends using a torque tester or torque sensor that covers the wrench's range. **For click wrenches:** 1. Use a compatible torque tester or sensor. 2. Connect the wrench using the appropriate adapter. 3. Use **First Peak mode** when testing with a digital analyzer or transducer. 4. Apply torque clockwise slowly and smoothly at the load point near the end of the handle. 5. Allow the wrench to click and note the reading. 6. Adjust as required. 7. Repeat testing to verify the setting. --- ### Standards & Compliance The Insulated Torque Wrenches are designed around both torque accuracy and electrical fastening requirements. **The product data sheet specifies:** - **ISO 6789:2017** - **±4% of setting** - Protection for applications up to **1,000 volts** The data sheet also states that the wrenches meet **IEC 60900 Standards**. --- ### Common Applications **Mountz Insulated Torque Wrenches can be used for:** - Battery terminal fastening - Electrical equipment assembly - Electrical panel assembly - Power distribution equipment - Electrically live fastening applications within the tool's rating - Industrial electrical maintenance - Battery-powered equipment - Electrical connection assembly - Applications requiring controlled torque and insulated tooling Mountz specifically notes battery terminal fastening as an application in the SLO operating instructions. --- ### Use Cases (Real-World Examples) #### Battery Terminal Fastening **Problem:** Battery terminals require controlled torque, while conductive tooling can introduce electrical hazards. **Solution:** The Insulated Torque Wrench combines adjustable torque control with insulated construction for fastening battery terminals within the tool's intended electrical rating. #### Electrical Equipment Assembly **Problem:** Electrical connections must be tightened to specification while minimizing the possibility of shorting or arcing. **Solution:** The wrench provides controlled torque and nonconductive insulation to support electrical fastening applications. #### Multiple Torque Requirements **Problem:** An electrical assembly contains fasteners requiring different torque settings. **Solution:** The adjustable design allows the operator to select different values within the **40–180 lbf.in** range using the same wrench. #### Socket Compatibility **Problem:** Two applications require the same torque range but use different socket drive configurations. **Solution:** Select the **SLO1/4I** for a 1/4" square drive or the **SLO3/8I** for a 3/8" square drive. --- ### Maintenance - Inspect the wrench and insulation before each use. - Keep the insulated surfaces clean and free from contamination. - Check for cuts, cracks, punctures, abrasions, or other insulation damage. - Remove the tool from service if the insulation is damaged or compromised. - Inspect the square drive and torque mechanism for wear or damage. - Periodically verify torque output using a calibrated torque analyzer. - Recalibrate according to your facility's calibration schedule and applicable quality requirements. - Store the wrench in a way that protects the insulation from physical damage. - Avoid exposing the insulated surfaces to conditions that could degrade the insulation. --- ### Integration & Advanced Notes - Mechanical adjustable click torque wrench - Requires no electrical power - Designed for electrical systems up to 1,000 volts - Double-insulated construction - Adjustable 40–180 lbf.in torque range - Available with 1/4" or 3/8" square drive - Both models have the same torque range, length, and weight - Audible click indicates when selected torque is reached - Compatible with torque analyzers for calibration and verification - Designed for electrical assembly where both torque control and insulated tooling are required - No electronic data collection or torque traceability --- ### Media & Supporting Content ![Mountz Insulated Torque Wrench — SLO Series](https://mountztorque.com/hs-fs/hubfs/insulatedwrenchthumbnail%20(1).jpg?width=650&height=650&name=insulatedwrenchthumbnail%20(1).jpg) - [Insulated Torque Wrenches Product Page](https://www.mountztorque.com/Product-Type/Torque-Wrenches/Torque-Wrenches-Insulated-Wrenches?hsLang=en-us) - [Insulated Torque Wrenches Product Data Sheet](https://www.mountztorque.com/core/media/media.nl?id=5794870&c=456127&h=MyMmAvT9jXf4nCn5aeXDFdp2krncpbRExviZvaBHD7e3eSk_&hsLang=en-us) - [Insulated Wrench Operating Instructions](https://www.mountztorque.com/core/media/media.nl?id=5743801&c=456127&h=hHzPCdBLvMgiwFZEQ0W46Q3hOGIT8d1XtwGcQVdkA1Q8MsuW&hsLang=en-us) --- ### Related Content - 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