--- product_id: 70007613 title: "TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router" brand: "twtade" price: "Β£11.13" currency: GBP in_stock: true reviews_count: 13 category: "Twtade" url: https://www.desertcart.co.uk/products/70007613-twtade-2pcs-me-8108-adjustable-roller-lever-arm-limit-switch store_origin: GB region: United Kingdom --- # Compact size 129x28x50mm Rated AC 250V 5A Adjustable lever arm TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router **Brand:** twtade **Price:** Β£11.13 **Availability:** βœ… In Stock ## Summary > πŸ”§ Elevate Your CNC Game with Precision and Power! ## Quick Answers - **What is this?** TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router by twtade - **How much does it cost?** Β£11.13 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/70007613-twtade-2pcs-me-8108-adjustable-roller-lever-arm-limit-switch) ## Best For - twtade enthusiasts ## Why This Product - Trusted twtade brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Value Pack:** Includes 2 limit switches for enhanced productivity. - β€’ **Robust Build Quality:** Durable materials ensure longevity and performance. - β€’ **User-Friendly Design:** Easy installation with adjustable lever for tailored use. - β€’ **Precision Engineering:** Crafted for accuracy and reliability in CNC applications. - β€’ **Versatile Configuration:** NC + NO contact options for diverse setups. ## Overview The TWTADE ME-8108 Adjustable Roller Lever Arm Limit Switch is a high-quality, versatile component designed for CNC mills and routers. Featuring a momentary actuator with both normally closed (NC) and normally open (NO) configurations, this switch operates at a rated voltage of AC 250V 5A and DC 115V 0.4A. Its compact dimensions and adjustable lever arm make it ideal for various applications, ensuring reliability and efficiency in your projects. ## Description TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router: desertcart.com: Industrial & Scientific Review: Great limit switch - The Arduino Limit Switch: A Crucial Component for Precision Control When it comes to precision control in the world of electronics and robotics, the Arduino Limit Switch stands out as an indispensable component. Whether you're a hobbyist tinkering with DIY projects or a seasoned engineer working on complex automation systems, the humble limit switch plays a crucial role in ensuring accurate and safe operation. In this comprehensive review, we'll explore the various aspects of the Arduino Limit Switch, from its basic functionality to its applications and advantages. **Unveiling the Arduino Limit Switch:** The Arduino Limit Switch is a simple yet highly effective device designed to detect the presence or absence of an object in a specific position. It consists of a lever arm, which can be triggered by physical contact with an object, and an electrical switch. When the lever arm is actuated, it engages the switch, completing an electrical circuit. This change in electrical state is then processed by an Arduino microcontroller or other similar controllers. **Basic Functionality:** The fundamental purpose of a limit switch is to establish physical boundaries or limits within a system. When integrated into a project, it serves as a feedback mechanism, allowing the controller to know when a particular position or threshold has been reached. This information is invaluable for preventing overextension, avoiding collisions, or ensuring precise positioning in various applications. **Applications Galore:** One of the standout features of the Arduino Limit Switch is its versatility. It finds applications in a wide range of fields, from 3D printing and CNC machining to home automation and industrial robotics. **1. 3D Printing:** In the realm of 3D printing, limit switches are used to home the printer's axes accurately, ensuring that the print head or build platform starts from a consistent reference point. This not only improves print quality but also prevents damage to the printer. **2. CNC Machining:** In CNC (Computer Numerical Control) machines, limit switches are crucial for defining the work envelope and preventing the machine from moving beyond its safe operational limits. This protects both the machine and the workpiece from potential damage. **3. Home Automation:** Limit switches are integral to various home automation projects. For example, they can be used to detect the position of blinds or curtains, allowing for automated control based on sunlight or user preferences. **4. Industrial Automation:** In industrial settings, limit switches are employed in conveyor systems, assembly lines, and other machinery to ensure precise product placement and movement. They play a pivotal role in safety by halting operations if an object is detected where it shouldn't be. **Advantages of the Arduino Limit Switch:** Several key advantages set the Arduino Limit Switch apart from alternatives: **1. Reliability:** Limit switches are robust and dependable, often rated for millions of cycles. This reliability is crucial in critical applications where accuracy is paramount. **2. Simplicity:** Their straightforward design and operation make limit switches easy to integrate into projects, even for beginners. **3. Cost-Effectiveness:** Arduino Limit Switches are affordable, making them accessible to a wide range of users and projects. **4. Safety:** In safety-critical applications, limit switches act as fail-safes, preventing dangerous situations by triggering an emergency stop or alert. **5. Compatibility:** These switches are readily compatible with Arduino and other microcontrollers, simplifying the integration process. **Conclusion:** In conclusion, the Arduino Limit Switch is an unsung hero in the world of electronics and automation. Its simplicity, reliability, and versatility make it an essential tool for those seeking precision control and safety in their projects. Whether you're a hobbyist or a professional engineer, the limit switch's ability to define boundaries and provide accurate feedback ensures that your creations operate flawlessly and efficiently. As technology advances, this unassuming device continues to play a crucial role in shaping the future of automation and control systems. Review: Easy setup - I purchased this to bypass my door openers up limit switch.The openers switch required constant cleaning to operate correctly it would work okay for awhile then stop and the opener would hammer the stop bolt. I installed this limit switch so the door would trigger it and stop. This required a little patience and planning the switch being totally adjustable is a great feature. It’s working perfectly very happy with overall quality and pricing would highly recommend. ## Features - Product name : mini limit switch; model no. : me8108; actuator action : Momentary - Actuator Type : rotary adjustable lever arm with roller; contact configuration : NC + NO (dpdt); rated Voltage : AC 250V 5A, dc 115V 0.4A - Roller dimension : 18 x 7Mm/0.71" x 0.2"(D*t); lever arm length : 9.2Cm/3.6"; fixing thread diameter : 4.5Mm/0.18 - Total size : 129 x 28x 50Mm/5.1"X 1.1 inch x 2 inch (l*w*h); mounting size : 56 x 21Mm/2.2" x 0.8 inch (l*w); material : rubber, plastic & metal - Excellent quality, preferential price, bring you the best shopping experience. Package Content : 2 x Limit Switch ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CM6Y3J8 | | Actuator Type | Rotary | | Best Sellers Rank | #31,947 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Limit Switches | | Brand | TWTADE | | Brand Name | TWTADE | | Circuit Type | 2-way | | Color | ME-8108 | | Compatible Devices | Machinery and automation devices requiring a limit switch | | Connectivity Protocol | X-10 | | Connector Type | Plug In | | Contact Material | Copper | | Contact Type | Normally Closed, Normally Open | | Control Method | Touch | | Control Type | Manual | | Current Rating | 5 Amps | | Customer Reviews | 4.6 out of 5 stars 379 Reviews | | International Protection Rating | 250 | | Manufacturer | TWTADE | | Material Type | iron | | Model | me8108 | | Mounting Type | Surface Mount | | Number of Items | 2 | | Number of Positions | 2 | | Operating Voltage | 250 Volts | | Operation Mode | ON-OFF | | Part Number | IN-4B99-1RDM | | Smart Home Compatibility | Not Smart Home Compatible | | Switch Type | Limit Switch, Rotary | | Terminal | Dpdt | | UPC | 661748052630 | | Unit Count | 2 Count | | Wattage | 1250 watts | ## Product Details - **Operation Mode:** ON-OFF - **Current Rating:** 5 Amps - **Operating Voltage:** 250 Volts - **Contact Type:** Normally Closed, Normally Open - **Connector Type:** Plug In - **Brand:** TWTADE - **Terminal:** Dpdt - **Circuit Type:** 2-way - **Mounting Type:** Surface Mount - **Actuator Type:** Rotary ## Images ![TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Image 1](https://m.media-amazon.com/images/I/61kuH2w2PsL.jpg) ![TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Image 2](https://m.media-amazon.com/images/I/61fK4u1QNnL.jpg) ![TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Image 3](https://m.media-amazon.com/images/I/61W8xeov9dL.jpg) ![TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Image 4](https://m.media-amazon.com/images/I/51ClGGWI52L.jpg) ![TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Image 5](https://m.media-amazon.com/images/I/61UUum1c8fL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Does the lever rotate in both directions?** A: Yes it is fully adjustable both 360 degrees on the shaft or by sliding on the slot on the lever arm. **Q: can a diode be added to this switch?** A: This is a mechanical on/off limit switch that will work for a/c or d/c. Yes, you could add a diode in a circuit with this switch but that seems like an exotic function for this simple switch. I use them in a 110v a/c circuit stopping an elevator at each floor. I have never had a failure of one. **Q: would this switch work with a raspberry pi raspberry pi?** A: Both Arduino and the Rasberry PI inputs are rated at 5V. It should work for the Rasberry PI. **Q: are these waterproof?** A: Not claimed to be WATERPROOF, but ARE Weatherproof. Waterproof infers dunking in water whereas Weatherproof infers that its operation and reliability are NOT affected by dampness or occasional exposure to rain showers. After 3 years of operation, mine still works like it did when I installed it. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great limit switch *by N***B on September 3, 2023* The Arduino Limit Switch: A Crucial Component for Precision Control When it comes to precision control in the world of electronics and robotics, the Arduino Limit Switch stands out as an indispensable component. Whether you're a hobbyist tinkering with DIY projects or a seasoned engineer working on complex automation systems, the humble limit switch plays a crucial role in ensuring accurate and safe operation. In this comprehensive review, we'll explore the various aspects of the Arduino Limit Switch, from its basic functionality to its applications and advantages. **Unveiling the Arduino Limit Switch:** The Arduino Limit Switch is a simple yet highly effective device designed to detect the presence or absence of an object in a specific position. It consists of a lever arm, which can be triggered by physical contact with an object, and an electrical switch. When the lever arm is actuated, it engages the switch, completing an electrical circuit. This change in electrical state is then processed by an Arduino microcontroller or other similar controllers. **Basic Functionality:** The fundamental purpose of a limit switch is to establish physical boundaries or limits within a system. When integrated into a project, it serves as a feedback mechanism, allowing the controller to know when a particular position or threshold has been reached. This information is invaluable for preventing overextension, avoiding collisions, or ensuring precise positioning in various applications. **Applications Galore:** One of the standout features of the Arduino Limit Switch is its versatility. It finds applications in a wide range of fields, from 3D printing and CNC machining to home automation and industrial robotics. **1. 3D Printing:** In the realm of 3D printing, limit switches are used to home the printer's axes accurately, ensuring that the print head or build platform starts from a consistent reference point. This not only improves print quality but also prevents damage to the printer. **2. CNC Machining:** In CNC (Computer Numerical Control) machines, limit switches are crucial for defining the work envelope and preventing the machine from moving beyond its safe operational limits. This protects both the machine and the workpiece from potential damage. **3. Home Automation:** Limit switches are integral to various home automation projects. For example, they can be used to detect the position of blinds or curtains, allowing for automated control based on sunlight or user preferences. **4. Industrial Automation:** In industrial settings, limit switches are employed in conveyor systems, assembly lines, and other machinery to ensure precise product placement and movement. They play a pivotal role in safety by halting operations if an object is detected where it shouldn't be. **Advantages of the Arduino Limit Switch:** Several key advantages set the Arduino Limit Switch apart from alternatives: **1. Reliability:** Limit switches are robust and dependable, often rated for millions of cycles. This reliability is crucial in critical applications where accuracy is paramount. **2. Simplicity:** Their straightforward design and operation make limit switches easy to integrate into projects, even for beginners. **3. Cost-Effectiveness:** Arduino Limit Switches are affordable, making them accessible to a wide range of users and projects. **4. Safety:** In safety-critical applications, limit switches act as fail-safes, preventing dangerous situations by triggering an emergency stop or alert. **5. Compatibility:** These switches are readily compatible with Arduino and other microcontrollers, simplifying the integration process. **Conclusion:** In conclusion, the Arduino Limit Switch is an unsung hero in the world of electronics and automation. Its simplicity, reliability, and versatility make it an essential tool for those seeking precision control and safety in their projects. Whether you're a hobbyist or a professional engineer, the limit switch's ability to define boundaries and provide accurate feedback ensures that your creations operate flawlessly and efficiently. As technology advances, this unassuming device continues to play a crucial role in shaping the future of automation and control systems. ### ⭐⭐⭐⭐⭐ Easy setup *by J***O on February 19, 2026* I purchased this to bypass my door openers up limit switch.The openers switch required constant cleaning to operate correctly it would work okay for awhile then stop and the opener would hammer the stop bolt. I installed this limit switch so the door would trigger it and stop. This required a little patience and planning the switch being totally adjustable is a great feature. It’s working perfectly very happy with overall quality and pricing would highly recommend. ### ⭐⭐⭐⭐⭐ Excellent limit switch functionality and value *by I***K on December 24, 2025* These are well built limit switches and work perfectly for a foot actuated table saw shutoff. The roller lever arm is easily adjusted for length with a set screw. What makes this limit switch very versatile is the Allen set screw that changes the angle of engagement. Inside contacts are both NC and NO for various applications. They are also activated by motion in either direction of the roller lever arm allowing push or pull triggering. Excellent value for the price. ## Frequently Bought Together - TWTADE 2Pcs ME-8108 Adjustable Roller Lever Arm Limit Switch NC-NO CNC Mill Router - Electromagnetic Power Relay, 8-Pin 10 AMP 110V/120V AC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY2NJ 2PCS [Applicable for DIN Rail System] - mxuteuk 2Pcs Red Green LED Light Voltage 110V-220V 22mm 1NO 1NC Waterproof IP65 SPST Momentary Push Button Switch 10A 600V LA155-A1-11D-RG --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/70007613-twtade-2pcs-me-8108-adjustable-roller-lever-arm-limit-switch](https://www.desertcart.co.uk/products/70007613-twtade-2pcs-me-8108-adjustable-roller-lever-arm-limit-switch) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-21*