How to choose the appropriate gear motor and gearbox
H1:Gear Motor & Gearbox Model Code Guide: How to Read and Select the Right Combination
H2:Gearbox Model Code Breakdown (Example: 5GU-25RC)
The gearhead (or gearbox) code defines the physical size and mechanical output of the reducer. Here is how to read 5GU-25RC:
| Code Position | Value | Meaning | Available Options |
| 1 | 5 | Frame Size | 2=60mm, 3=70mm, 4=80mm, 5=90mm, 6=104mm |
| 2 | GU | Motor Shaft Type (Pinion) | GN=Helical Gear (6-40W), GU=Helical Gear (60-200W), GM=Intermediate Gearbox |
| 3 | 25 | Gear Ratio | 1:3 to 1:250 (see full list below) |
| 4 | RC | Bearing/Output Type | K=Standard Rolling Bearing, RT=Right Angle Solid Shaft, RC=Right Angle Hollow Shaft |
Available Gear Ratios (Position 3)
Ratios range from 3:1 up to 250:1, including: 3, 5, 7.5, 10, 12.5, 15, 18, 20, 25, 30, 36, 40, 50, 60, 75, 100, 120, 150, 180, 200, 250.
Output Type Options (Position 4)
K: Standard inline shaft with rolling bearings.
RT: Right Angle Solid Shaft (keyway, for coupling/pulleys).
RC: Right Angle Hollow Shaft (direct mounting onto driven shaft).
H2: Motor Model Code Breakdown (Example: 5IK90RGU-CF)
The motor code defines the electrical and mechanical characteristics of the drive. Here is how to read 5IK90RGU-CF:
| Code Position | Value | Meaning | Available Options |
|---|---|---|---|
| 1 | 5 | Frame Size | 2=60mm, 3=70mm, 4=80mm, 5=90mm, 6=104mm |
| 2 | I | Motor Type | I=Induction, R=Reversible, T=Torque |
| 3 | K | Motor Series | K Series |
| 4 | 90 | Power Rating | 6W, 15W, 25W, 40W, 60W, 90W, 120W, 140W, 180W, 200W, 250W |
| 5 | R | Speed Control | R=Speed Control Motor (Variable Speed) |
| 6 | GU | Motor Shaft (Pinion) | A=Round Shaft, GN=Helical (6-40W), GU=Helical (60-200W) |
| 7 | C | Voltage | A=1PH 110V, C=1PH 220V, S=3PH 220V, S3=3PH 380V, S4=3PH 440V |
| 8 | F | Accessory | F=Fan Cooling (Optional, often omitted in basic codes) |
I (Induction): Standard constant-speed motor.
R (Reversible): Capable of instant forward/reverse operation.
T (Torque): Designed for high starting torque and continuous slip applications.
Voltage Codes (Position 7)
A: Single-phase 110V
C: Single-phase 220V
S: Three-phase 220V
S3: Three-phase 380V
S4: Three-phase 440V
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