VAC-YMMC11-7.5R-054 Okuma
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The Okuma VAC-YMMC11-7.5R-054 is a servo motor from the VAC Servo Motors series. It provides continuous power of 7.5 kW and can reach 11 kW for up to 30 minutes, with a rated speed of 500 to 6000 rpm. The motor has a rated voltage of 170 V, operates at a continuous current of 50 A, and weighs 170 kg.
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Product Description:
The VAC-YMMC11-7.5R-054 is an AC servo motor produced by Okuma within the VAC Servo Motors series. It serves as a regulated torque source for axis drives and high-speed spindles in automated machine tools, allowing the CNC controller to regulate position, velocity, and acceleration through closed-loop feedback. By supplying precisely commanded mechanical power, the motor supports repeatable interpolation, surface finishing, and coordinated multi-axis cutting tasks common to industrial automation cells. Its electromagnetic design is matched to Okuma VAC amplifiers, supporting compatible electrical performance and straightforward cabinet integration.
For short-term peaks, the winding can carry 68 A for up to thirty minutes, enabling rapid acceleration or heavy chip loads before thermal limits are reached. During the same duty period, the shaft can deliver 11 kW of mechanical power, giving the motor added capacity for roughing passes. The dual listed rated speed of 500/6000 rpm indicates a low-speed nominal point for constant-torque operation and a high-speed ceiling for constant-power machining. Electrical excitation is optimized for a bus voltage of 170 V, so the inverter supply must maintain that level to preserve current linearity. At the drive end, the rotor is supported by a deep-groove ball bearing coded 6311M2ZZ; this bearing size accommodates cutting forces and uses shields that retain grease during service operation.
Under continuous duty, the motor is rated for 50 A, a steady-state current that the insulation system can withstand indefinitely. Under the same operating conditions, the output is rated at 7.5 kW, making the motor suitable for prolonged finishing cycles where heat generation must remain stable. The opposite shaft end uses bearing type 6210M2ZZ, which is sized for the lighter loads present away from the driven coupling. With a mass of 170 kg, the frame requires rigid mounting structures and proper lifting equipment, while the added weight also helps damp vibration during continuous production.
Frequently Asked Questions about VAC-YMMC11-7.5R-054:
Q: What is the continuous power rating of the VAC-YMMC11-7.5R-054 servo motor?
A: During continuous operation, the VAC-YMMC11-7.5R-054 servo motor delivers a power output of 7.5 kW.
Q: What is the rated voltage for the VAC-YMMC11-7.5R-054 servo motor?
A: This servo motor operates at a rated voltage of 170 V.
Q: What is the rated speed range of the VAC-YMMC11-7.5R-054 motor?
A: The servo motor can reach a rated speed range of 500 to 6000 rpm.
Q: What is the maximum current the VAC-YMMC11-7.5R-054 can handle for 30 minutes?
A: At 30-minute intervals, the VAC-YMMC11-7.5R-054 can handle a current of 68 A.
Q: What type of drive end bearing is equipped in the VAC-YMMC11-7.5R-054 servo motor?
A: The drive end bearing used in this motor is the 6311M2ZZ model.
