Description
The KW11-N Micro Limit Switch with Roller Lever is a compact snap-action microswitch used for limit detection, position sensing, door detection, trigger control, 3D printer endstop, CNC machine limit, robot bumper, automation and DIY electronics projects.
This switch comes with a metal lever and small roller wheel, which makes it easier to detect movement smoothly when a moving object, wheel, door, slider or mechanical part touches the lever.
KW11-N Micro Limit Switch with Roller Lever একটি compact snap-action microswitch, যা limit detection, position sensing, 3D printer endstop, CNC limit switch, robot bumper, door detection এবং automation project-এ ব্যবহার করা হয়। এতে metal lever-এর সাথে ছোট roller wheel থাকে, তাই moving object touch করলে switch সহজে trigger হয়।
It has 3 terminals: COM, NO and NC, so it can be used in both normally open and normally closed switching circuits.
Product Highlights / প্রধান বৈশিষ্ট্য
✅ KW11-N micro limit switch with roller lever
✅ Compact snap-action switching mechanism
✅ Built-in roller wheel for smooth mechanical triggering
✅ 3-pin terminal: COM, NO, NC
✅ Can be used as Normally Open or Normally Closed switch
✅ Suitable for 3D printer, CNC, robot and automation projects
✅ Easy to mount using screw holes
✅ Fast response and reliable mechanical switching
✅ Useful for position detection and limit control
✅ Ideal for DIY electronics, robotics and mechanical projects
Applications / ব্যবহার ক্ষেত্র
• 3D printer endstop switch
• CNC machine limit switch
• Robot car bumper switch
• Door open/close detection
• Mechanical position detection
• Automation limit control
• Slider or moving part detection
• Home automation project
• Arduino / ESP32 input trigger project
• Mini machine safety position sensing
• DIY electronics and repair work
• Educational robotics project
Package Includes / প্যাকেজে যা থাকছে
✅ 1 × KW11-N Micro Limit Switch with Roller Lever
⚠️ Note: Wire, connector, screws, Arduino board and other accessories are not included unless mentioned separately.
Technical Specifications / স্পেসিফিকেশন
• Product Type: Micro Limit Switch / Microswitch
• Model: KW11-N
• Switch Type: Snap-action mechanical switch
• Actuator Type: Metal lever with roller wheel
• Terminal Type: 3-pin solder / quick terminal
• Contact Pins: COM, NO, NC
• Contact Mode: Normally Open and Normally Closed supported
• Rating Marking: Commonly marked as 10T85 / may vary by stock batch
• Mounting: Screw hole mounting
• Body Material: Plastic switch body with metal lever
• Recommended Use: Limit switch, endstop, position sensor and mechanical trigger projects
Pin Description / পিন পরিচিতি
• COM: Common terminal
• NO: Normally Open terminal
• NC: Normally Closed terminal
NO connection: Circuit remains open normally and becomes connected when the lever is pressed.
NC connection: Circuit remains connected normally and becomes open when the lever is pressed.
How It Works / কীভাবে কাজ করে
When the roller lever is pressed by a moving object, the internal snap-action contact changes its state. The NO contact becomes connected and the NC contact becomes disconnected. When the lever is released, the switch returns to its normal position.
যখন কোনো moving object roller lever-এ চাপ দেয়, তখন switch-এর internal contact change হয়। NO pin connect হয় এবং NC pin disconnect হয়। Lever ছেড়ে দিলে switch আবার আগের অবস্থায় ফিরে আসে।
Arduino Use Example
This switch can be easily used with Arduino as a digital input.
Basic Connection:
• COM → GND
• NO → Arduino Digital Pin
• Use Arduino internal pull-up resistor
Simple Arduino Code:
#define SWITCH_PIN 2
void setup() {
Serial.begin(9600);
pinMode(SWITCH_PIN, INPUT_PULLUP);
}
void loop() {
if (digitalRead(SWITCH_PIN) == LOW) {
Serial.println("Switch Pressed");
} else {
Serial.println("Switch Released");
}
delay(200);
}Why Choose Roller Lever Microswitch?
A roller lever microswitch is better for moving mechanical parts because the roller reduces friction and allows smoother triggering. It is especially useful for robot bumpers, sliding mechanisms, CNC axis limit detection, 3D printer endstop systems and mechanical automation projects.
Roller lever থাকার কারণে moving object switch-এর উপর smooth ভাবে চাপ দিতে পারে। তাই robot, CNC, 3D printer, door sensor বা mechanical automation project-এ এটি বেশি practical।
Important Notes / গুরুত্বপূর্ণ নোট
⚠️ Check the printed rating on the switch body before using with AC load.
⚠️ For high-power load, motor or mains AC control, use proper relay/contactor and safety protection.
⚠️ Do not exceed the switch rating.
⚠️ This switch is not waterproof. Use protective enclosure for dusty or wet environment.
⚠️ Avoid excessive mechanical force on the lever.
⚠️ Make sure wiring is connected to the correct COM, NO or NC terminal.
⚠️ Product marking, lever shape and terminal color may vary slightly depending on stock batch.
Frequently Asked Questions / FAQ
What is this switch used for?
It is used for limit detection, position sensing, endstop, door detection, robot bumper and mechanical trigger projects.
Does it have NO and NC contacts?
Yes. It has COM, NO and NC terminals.
Can I use it with Arduino?
Yes. It can be used as a digital input switch with Arduino, ESP32 and other microcontrollers.
Can it be used for 3D printer endstop?
Yes. It is suitable for 3D printer endstop and CNC limit switch applications.
Is it waterproof?
No. This is a standard microswitch and should be protected from water or moisture.
Does it come with wire?
No. This listing is for the switch only unless wire is mentioned separately.
What is the benefit of roller lever?
The roller lever provides smoother contact with moving parts and reduces friction during triggering.
KW11-N Micro Limit Switch with Roller Lever 10T85 Microswitch
Buy KW11-N micro limit switch with roller lever 10T85 microswitch for 3D printer, CNC, robot car, door detection, Arduino, automation and limit control projects.
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