The FGH4KK-1200G-90G-NG/20P is a heavy-duty incremental encoder model widely used in steel mills, rolling lines, and heavy industrial machinery where durability and precision are critical. As this encoder has become increasingly difficult to procure, we now offer a custom-built 1:1 replacement solution that replicates all original parameters — including output signals, shaft dimensions, and mounting interface. Our engineering team ensures complete functional compatibility while delivering shorter production lead times, providing customers with an efficient way to solve supply and maintenance challenges for legacy equipment.
This encoder is engineered to perform under demanding industrial conditions such as vibration, dust, and high temperatures typical of metallurgical environments. The FGH4KK-1200G-90G-NG/20P replacement unit provides excellent signal stability and mechanical strength, making it ideal for use in motor feedback systems, conveyor drives, and steel processing automation. In addition to matching the original performance, our design supports various connector styles and cable orientations for on-site flexibility, ensuring easy installation and long service life.
Replacement solution reference image.
Incremental Encoder Specifications (FG(H)40 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
| Type | Specification |
|---|---|
| with feather key/keyway | |
| Solid shaft | 16P = Ø 16 H7 mm (option H6) |
| 18P = Ø 18 H7 mm | |
| 20P = Ø 20 H7 mm | |
| Hollow shaft | 16PF = Ø 16 H7 mm |
| 18PF = Ø 18 H7 mm | |
| 20PF = Ø 20 H7 mm | |
| with clamping | |
| Hollow shaft | 16K = Ø 16 H7 mm |
| 25K = Ø 25 H7 mm |
