--- product_id: 446379381 title: "RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine" brand: "rattmmotor" price: "$20.71" currency: USD in_stock: false reviews_count: 4 url: https://www.desertcart.ec/products/446379381-rattmmotor-normally-open-mach3-cnc-automatic-tool-sensor-gauge-changer store_origin: EC region: Ecuador --- # 0.001mm ultra-precise positioning No built-in amplifier, stable signal IP67 dustproof & waterproof durability RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine **Brand:** rattmmotor **Price:** $20.71 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Elevate your CNC game with precision that never quits! ## Quick Answers - **What is this?** RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine by rattmmotor - **How much does it cost?** $20.71 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/446379381-rattmmotor-normally-open-mach3-cnc-automatic-tool-sensor-gauge-changer) ## Best For - rattmmotor enthusiasts ## Why This Product - Trusted rattmmotor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** IP67-rated dustproof and waterproof design ensures relentless performance even in coolant and metal shavings. - • **Micron-Level Precision:** Achieve flawless tool length setting with 0.001mm repeat accuracy—because every micron counts. - • **Smart Signal Stability:** Direct NC program input with no amplifier needed—immune to temperature and voltage fluctuations for zero downtime. - • **3 Million Contact Lifespan:** Engineered for longevity with up to 3 million reliable contact cycles—work smarter, not harder. - • **Instant Over-Travel Alerts:** Protect your investment with real-time alarm signals preventing tool setter damage and costly machine downtime. ## Overview The RATTMMOTOR Mach3 CNC Automatic Tool Sensor Gauge is a high-precision, normally open 4-wire tool setter designed for engraving and machining centers. Featuring 0.001mm repeat positioning accuracy, a durable IP67-rated housing, and a 3 million cycle contact lifespan, it delivers reliable tool length setting, wear detection, and breakage alerts. Its dustproof, waterproof design and stable signal output without the need for an amplifier make it an essential upgrade for professional CNC routers and engravers seeking flawless efficiency and longevity. ## Description Package include:1 x CNC Router Z Axis High Tool SettingSpecification: Output mode: NC(normally closed) Pre trip: Almost 0Stroke: 5mmRepeat positioning accuracy: 0.001mm(operation speed:50-200mm/min) Life: 3000000 times.Contact force: 1.5NOuter shell: Grinding 4S. Protection: IP67Cutter head: Diameter 20mm, hard carbideShock rating: 20mA(MAX) DC24V recommended value(10mA)resistive load Cable: 1.5M 2-cell tensile strength 30N Minimum bending radius R7 Protection Tube: 1.3M (Minimum bending radius R25)Exceed the specifications: NC(Normally closed),distance signal about 5mm Shock rating: DC24V 20mA(MAX) 10mA(Resistive load).Precautions for use:The contact cannot exceed the stroke(stroke is 5mm) of the tool setting tool, otherwise the tool will easily damage the tool setting tool.Do not release it immediately when touching the tool face by hand to avoid damaging the internal structure of the tool setting tool and affecting the service life and efficiency.After the tool is finished, the knife must be lifted vertically to leave the contact surface. Do not move it laterally. This should be easy to damage the tool. Review: False advertising - This is not a Normally Open tool sensor. It is NC. I've ascertained that the only way it could be a normally open sensor is to have a built-in FET circuit. Aka would need to be a six-wire unit requiring voltage to invert the state. 6-wire versions provide both NC and NO states. Review: False Advertising - This is not a Normally Open tool height sensor like the title said. I have tested it and both the main and the overtravel contacts are Normally Closed. I have paid premium price thinking that I am getting the correct sensor. Now my machine build is delayed! .... False advertising. Buyers beware! ## Features - 【Description】The tool setting instrument is a special tool setting instrument for the engraving machine machining center machine. The output signal of the tool setting instrument is received by the numerical control system and then the tool length setting, tool wear detection and tool breakage are detected by the program control. In the case of no vibration and malfunction, the thermal deformation of the machine can be corrected according to the rated voltage and current and the specified speed. - 【Parameter】This is a normally open 4-wire high-precision tool setting instrument with a stroke of 5mm. The positioning accuracy is 0.001mm, the contact life is up to 3 million times, the contact force is 1.5N, and the contact rating: DC24V 20mA. - 【Material】The housing material of this tool setter is made of 4S grinding grade material. The bottom magnet design can be directly connected to the machine and firmly adsorbed to the body. The contact material is made of super hard alloy, the design is exquisite and the installation is simple. - 【Feature-1】This tool setting instrument is designed with dustproof and waterproof structure, which can still have strong durability under the condition of coolant and iron filings. It does not need a built-in amplifier and will not be caused deviations by the location temperature and power supply voltage fluctuations of the tool setting instrument, which can be directly input to the NC program. - 【Feature-2】The tool setter will send out an alarm signal in time when it is over-travel to avoid other troubles caused by equipment operation. Moreover, the tool setter has strong anti-interference. The protruding sharp corner of the tool directly touches the tool tip related to the machining size, detects its value and size, and outputs the signal. It has higher accuracy than the average value obtained by converting the amount of light and electricity. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08LK93NTC | | Brand | RATTMMOTOR | | Brand Name | RATTMMOTOR | | Customer Reviews | 3.0 out of 5 stars 12 Reviews | | Global Trade Identification Number | 00713721466467 | | Item Dimensions | 15 x 7 x 11 centimeters | | Item Weight | 0.45 Kilograms | | Item dimensions L x W x H | 15 x 7 x 11 centimeters | | Item weight | 0.45 Kilograms | | Manufacturer | RTM | | Material | Carbide | | Material Type | Carbide | | Model | H:65 | | Number of Items | 1 | | Part Number | H:65 | | UPC | 713721466467 619191755172 769135849716 | | Unit Count | 1 Count | ## Product Details - **Brand:** RATTMMOTOR - **Item dimensions L x W x H:** 15 x 7 x 11 centimeters - **Item weight:** 0.45 Kilograms - **Material:** Carbide - **UPC:** 713721466467 619191755172 769135849716 ## Images ![RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - Image 1](https://m.media-amazon.com/images/I/71bLea7Wj9L.jpg) ![RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - Image 2](https://m.media-amazon.com/images/I/71MJjnioSoL.jpg) ![RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - Image 3](https://m.media-amazon.com/images/I/71OyWvPT7+L.jpg) ![RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - Image 4](https://m.media-amazon.com/images/I/71Vc0ZyjlWL.jpg) ![RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - Image 5](https://m.media-amazon.com/images/I/71yEzVYZB5L.jpg) ## Customer Reviews ### ⭐ False advertising *by K***N on 7 March 2026* This is not a Normally Open tool sensor. It is NC. I've ascertained that the only way it could be a normally open sensor is to have a built-in FET circuit. Aka would need to be a six-wire unit requiring voltage to invert the state. 6-wire versions provide both NC and NO states. ### ⭐ False Advertising *by I***O on 10 December 2025* This is not a Normally Open tool height sensor like the title said. I have tested it and both the main and the overtravel contacts are Normally Closed. I have paid premium price thinking that I am getting the correct sensor. Now my machine build is delayed! .... False advertising. Buyers beware! ### ⭐⭐ Arrived DOA. I repaired it but the internals are basic. *by A***G on 4 March 2024* This arrived dead. I decided to repair it rather than return. The internal mechanism is two microswitches so the primary sensor is not a piezoelectric as implied by the circuit diagram. One of the wires was loose. I resoldered them all as they were soldered at an angle and almost short circuiting and added some insulation. Also adjusted the microswitch position. Mechanically it is not terrible. ## Frequently Bought Together - RATTMMOTOR Normally Open Mach3 CNC Automatic Tool Sensor Gauge Changer CNC Z Axis Probe Tool Touch Sensor Setter Setting 4 Wires for CNC Router Engraver Machine - PGFUN DIY CNC Touch Probe XYZ Axis 3D Digitizing Edge Finder 3-Coordinate Measuring Sensor Kit with 6 mm Shank & 2.0 mm Tungsten Steel Ball Tip --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/446379381-rattmmotor-normally-open-mach3-cnc-automatic-tool-sensor-gauge-changer](https://www.desertcart.ec/products/446379381-rattmmotor-normally-open-mach3-cnc-automatic-tool-sensor-gauge-changer) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-10*