Overview
The 4B Components WG1-4B-1 is a universal shaft sensor mount engineered for mounting inductive speed sensors and motion detectors on rotating machinery. The Whirligig is a fully guarded target for mounting shaft sensors (speed switches), and the Mag-Con adaptor magnetically attaches the unit to the shaft. The WG1-4B-1 variant features a single pulse (target) for applications requiring one detection point per revolution, making it ideal for basic speed monitoring in conveyor systems, pump drives, fan motors, and other rotating equipment.
Key Features
- Universal compatibility with DIN Style and Standard Cylindrical Inductive Sensors
- Sensors bolt to the Whirligig base plate and the complete assembly either bolts to the machines shaft through a 1/2″ UNC tapped hole, or is connected magnetically using 4B’s patented Mag-Conâ„¢ adaptor
- Shaft or machine vibration does not affect the performance of the sensor, as the whole assembly moves with the shaft
- Bracket for 18/30 mm Diameter Sensor Included
- Fully Enclosed Target for Safe Operation
- Stainless steel construction for durability and corrosion resistance
Technical Specifications
- Body Material: Sealed Heavy Duty Stainless Steel
- Shaft Material: Stainless Steel
- Pulses/Targets: 1 Pulse
- Mounting Thread: 1/2″ UNC tapped hole or magnetic (with optional Mag-Con adapter)
- Sensor Bracket Compatibility: 18 mm / 30 mm diameter sensors
- Magnetic Holding Force: Over 100 lbs (when using Mag-Con adapter)
- Design: Fully Guarded Target Assembly
- Patent: U.S. Patent #6,109,120
Typical Applications
The WG1-4B-1 is commonly deployed in conveyor belt monitoring, pump speed verification, fan motor control, and general machinery speed detection. Its single-pulse configuration provides one detection per shaft revolution, making it suitable for basic on/off speed monitoring and low-resolution RPM feedback in industrial automation systems. It is compatible with 4B’s M100, M300, M800 Elite, and Milli-Speed switch sensors, as well as P100, P300, and P800 proximity sensors.
Compatibility & Replacements
Compatible With
- 4B M100 Speed Switch Sensors
- 4B M300 Speed Switch Sensors
- 4B M800 Elite Speed Switch Sensors
- 4B Milli-Speed Sensors
- 4B P100, P300, P800 Proximity Sensors
- Industry-standard DIN-style cylindrical inductive sensors (18 mm, 30 mm)
- Machinery with 1/2″ UNC tapped holes on rotating shafts
Replaces / Drop-In Replacement For
The WG1-4B-1 is the OEM part number for 4B Components’ 1-pulse Whirligig mount. Verify compatibility with your system integrator before ordering if replacing legacy equipment.
Works With
- 4B Mag-Conâ„¢ Magnetic Connector (optional, part MAG2000)
- Industrial inductive proximity and speed switch sensors compliant with DIN standards
- PLC and automation controller speed monitoring inputs
- Machinery requiring OSHA-compliant rotating shaft guarding
