What Your Fanuc Servo Motor Model Number Means

When your Fanuc Servo Motor is ready for repair or replacement, a quick look at the nameplate usually yields its model number. Therefore, it also gives you marching orders to find what you need to get back up and running.
 
But have you ever stopped to understand what all those figures that make up a Fanuc Servo Motor model number mean? It’s an interesting study, and it gives clues to how your motor is constructed.

Head servo motor repair technician Jason explains the Servo Motor Nameplate Identification of Fanuc Alpha Series.

 

Take the Fanuc Alpha Series Servo Motor, for example. These motors start with A06B at the beginning.
 
Here’s the model number breakdown:
   
In the second section, the two positions (♦ ♦) indicate the physical length your motor. For the Fanuc Alpha Series Servo Motor, there are many different servo motor lengths; however, there are nine motor lengths we will focus on, which are listed below.
 

• 42: Model α 12/2000
• 43: Model α 12/3000
• 46: Model α 22/1500
• 48: Model α 22/3000
• 51: Model α 30/1200
• 52: Model α 30/2000
• 53: Model α 30/3000
• 57: Model α 40/2000
• 58: Model α 40/2000 (with fan)

 
In the third section, the second position (■) refers to your motors shaft brake options. There are four different brake options for this servo motor model: 0, 1, 5, or 6. The different brake options and meanings are listed below.
 

• 0: Straight Shaft (Standard)
• 1: Straight Shaft with Brake (35 Nm)
• 5: Taper Shaft
• 6: Taper Shaft with Brake (35 Nm)

 
The last two positions, together, in the third section (♣ ♣) tell your servo motors feedback options. For this servo motor, there are four different feedback options: 75, 77, 84, or 88.
 

• 75: With the Pulse Coder α A64
• 77: With the Pulse Coder α I64
• 84: With the Serial Pulse Coder α A
• 88: With the Serial Pulse Coder α A1000

At the end of the model number, you may see a # symbol followed by a number; this addition to the model number tells if the motor is sealed or unsealed and if the motor has a keyway in the shaft or not. If there is not a # symbol followed by a number after the model number, by default, #0000 or #7000 will be attached to the model number. The different options are listed below.
 

• #7000    Unsealed motor without a keyway in the shaft
• #0000    Unsealed motor without a keyway in the shaft
• #7008    Unsealed Motor with a keyway in the shaft
• #0008    Unsealed motor with a keyway in the shaft
• #7075    Sealed motor without a keyway in the shaft
• #0075    Sealed motor without a keyway in the shaft
• #7076    Sealed motor with a keyway in the shaft
• #0076    Sealed motor with a keyway in the shaft

 
So, let’s put what we have learned into practice by looking at the Fanuc Servo Motor A06B-0142-B575.
 
The servo motor has a physical length of 42, which is model α 12/2000 (42), and it has a taper shaft (5). This model also has a feedback option with the pulse coder α A64 (75).
 
For more servo motor options, see Repair Zone’s complete inventory Fanuc Servo Motors. If you need help identifying a motor, call one of our techs for assistance at 989-922-0043.  To view our full servo motor repair capabilities, click here.