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258797 - Miller Magnetic Pickup Speed Sensor M18x1.5

Packaging: 1 PER EA
$665.13/EA $434.89/1 PER EA only $434.89/EASave 35%

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OVERVIEW

Genuine Miller Magnetic Pickup for Engine Driven Equipment

The Miller 258797 Magnetic Pickup is a critical replacement component designed for specific Miller engine-driven welding generators. As a genuine OEM part, it ensures the reliability and performance standards expected from Miller Electric equipment. This sensor, featuring an M18 x 1.5 thread size, is engineered to screw directly into the engine bell housing or flywheel housing, where it detects the passing of flywheel teeth to measure engine rotational speed (RPM).

In industrial environments, equipment downtime can be costly. The magnetic pickup plays a vital role in the electronic governing system of the welder. By providing accurate speed data to the machine's control board, it allows the system to adjust the throttle and maintain the target RPM under varying loads. If this sensor fails or becomes damaged, the machine may experience erratic idling, failure to rev up when an arc is struck, or complete shutdown to protect the engine. Replacing a faulty sensor with this high-quality Miller part restores proper communication between the engine and the control logic.

Josef Gas provides this part to support maintenance teams and repair technicians who require authentic components for their fleet. The M18x1.5 specification is a standard metric thread used in many industrial engine applications, ensuring a secure and precise fit. The sensor is built to withstand the high temperatures and constant vibration inherent in welding operations, ensuring a long service life. Whether you are performing a scheduled overhaul or an emergency repair, using the correct magnetic pickup is essential for the safe and efficient operation of your power source.

Key Technical Aspects:

  • Precision Threading: M18x1.5 threads ensure the sensor seats correctly without damaging the housing.
  • Signal Integrity: Generates a clean AC voltage signal proportional to engine speed.
  • Durability: Encapsulated electronics protect against moisture, oil, and dirt ingress common in field environments.
Additional Information
----- new values below ----
Thread Size:M18x1.5
Part Type:Magnetic Pickup, Speed Sensor
Compatible Equipment:Engine Driven Welders

INCLUDED

  • 1 x Magnetic Pickup Sensor (M18x1.5)

APPLICATIONS

  • Engine-driven welder speed sensing
  • RPM monitoring for electronic governors
  • Auto-idle control systems
  • Generator frequency regulation
  • Flywheel rotation detection

FAQ

The thread size is M18 x 1.5.

It measures the engine's RPM by sensing the rotation of the flywheel teeth and sending a signal to the control board to regulate speed.

Yes, this is a genuine OEM Miller Electric replacement part, SKU 258797.

Symptoms often include the engine failing to idle up, erratic speed control, or the machine shutting down with RPM sensor error codes.

Generally, you screw it in until it gently touches a flywheel tooth, then back it off a specific amount (e.g., 1/2 to 3/4 turn) and lock it with the jam nut. Always consult your specific machine's manual for the exact gap procedure.

No, it is specific to models that require the M18x1.5 thread and specific resistance values. Check your parts manual for compatibility.

Typically, the sensor is supplied as the unit itself. If a jam nut is required and not included, the existing one can often be reused if it is in good condition.

It is not recommended. Generic sensors may have different resistance values or signal characteristics that can confuse the welder's control board.