FGH4K-500G-90G-NG/20P Heavy-Duty Encoder Replacement Solution

The FGH4K-500G-90G-NG/20P heavy-duty incremental encoder is widely used in demanding industrial environments such as steel mills, rolling lines, and metallurgical processing equipment. As the original model has become increasingly difficult to source, we provide a 1:1 customized replacement solution that precisely matches the original encoder’s mechanical and electrical parameters. This includes shaft diameter, mounting dimensions, output signal type, and pulse resolution, ensuring seamless integration into existing systems without modifications. Our efficient production process allows for short delivery times, helping customers maintain continuous operation and minimize downtime in critical industrial applications.

In terms of application, the FGH4K-500G-90G-NG/20P is known for its robustness and reliability under harsh operating conditions. It delivers stable incremental feedback even in environments with vibration, high temperature, and dust exposure, making it ideal for heavy-duty drives, rolling mills, and automated steel processing systems. Our replacement encoders preserve these performance characteristics while also offering flexibility in shaft and connector options, providing a practical and dependable solution for industrial operations that rely on precise motion control.

Our heavy-duty replacement solution has already been successfully applied in multiple regions including the Middle East, Russia, Southeast Asia, Indonesia, and South America. These deployments demonstrate the global reliability and effectiveness of our customized encoder alternatives.

Replacement solution reference image.

Incremental Encoder Specifications (FG(H)4 Series)

Construction type

• Solid shaft B5 (flange) or B35 (flange + foot)
• H = Hollow shaft
• HJ = Hollow shaft (isolated)

Series

[Series information not explicitly listed in the image]

Electrical connection

• R = Terminal strip in a terminal box / 12-pole round connector Bundy
• C = Cable outlet / FCC connector in a terminal box
• KK = Second terminal box (available output signals on request)

Pulses per rotation

• Square pulses: 500, 600, 1000, 1024, 1200, 1300, 2000, 2048, 2400, 2500, ...1 million
• Sinus signals: 500, 600, 1000, 1024, 1200, 1300, 2500
• Other pulse ratios on request

Signal output

• Basic version: 0°, 90°, each with inverted signals
• - = without reference pulse
• NG = Reference pulse with inverted signal

Additional options signal outputs (see p.11)

• 2F = Option 2F; B2 = Option B2
• B = Option B; B3 = Option B3

Overspeed switch (see p.11)

• - = without option S
• S = Option S

Shaft