NSK

CNC Electric Motor – NSK YS2020GN011

The YS2020GN011 is a CNC axis control electric motor (“CNC Axis Motor”) manufactured by NSK, belonging to the YS series within NSK’s precision motion control line. The part number YS2020GN011 identifies the constructive variant, winding specification and mechanical configuration of the motor. The component is used as a rotary actuator in servo-axis systems or spindle drive applications on machining centres, CNC lathes and precision grinding machines. It is compatible with dedicated NSK servo drives or equivalents, with feedback via an integrated encoder or resolver within the motor body.

The motor is the final actuator in the control chain: it converts the electrical signal from the servo drive into mechanical torque and rotary motion on the axis or tool. If it fails, the controlled axis or function becomes locked or uncontrollable, rendering the machine unusable until the component is replaced or repaired; typical symptoms include position loss, torque alarms or no response to movement commands.

NSK Ltd. is one of Japan’s leading manufacturers of motion control components: in addition to rolling bearings — for which it is universally known — NSK produces precision motors, linear guides and drive systems for CNC machine tools. Founded in 1916, NSK is a de facto reference for high-precision applications thanks to its superior build quality and reliability proven over decades of industrial use. Models from the YS series of earlier production are to be considered legacy / discontinued: verify availability with authorised distributors or through specialist used-parts channels.

Main Technical Specifications

CNC Servo Motor – NSK YS3040GN011

The YS3040GN011 is a precision CNC servo motor (“CNC Servo Motor”) manufactured by NSK, belonging to the YS series within NSK’s machine tool drive product line. The unit is designed for high-precision axis control on machining centres, grinding machines, and CNC systems that demand high positioning repeatability. The part number YS3040GN011 identifies the complete motor assembly including the integrated encoder; accessories such as connector kits and cables must be ordered separately according to the machine builder’s documentation.

The servo motor is the electromechanical actuator that converts the CNC reference signal into controlled rotary motion on the machine axis: it maintains the programmed position and speed even under load variations, thanks to the encoder feedback loop to the servo drive. A motor failure — caused by open windings, a damaged encoder, or worn bearings — completely disables the affected axis, rendering the machine inoperable until the component is replaced or repaired.

NSK Ltd. is a Japanese manufacturer founded in 1916 and a world leader in rolling bearings, ball screws, linear guides, and precision motors for machine tools. NSK’s Motion & Control division supplies ultra-precision components to the aerospace, automotive, and manufacturing sectors. Products in the YS series are classified as legacy / discontinued: available exclusively as used, NOS surplus, or through specialist overhaul.

Main Technical Specifications

Axis Servo Drive – NSK ESA-Y3040TF1-20

The ESA-Y3040TF1-20 is an electronic servo drive for CNC axis control (“Electronic Servo Amplifier”), manufactured by NSK (Nippon Seiko K.K.) and belonging to the ESA series. The series code Y3040TF1 identifies the power configuration and integrated input filter; the suffix -20 indicates the supply voltage class (200 V AC three-phase). The module manages the current and speed regulation loops of the axis servo motor, interfacing with the CNC system via analogue reference or serial bus. Variants may exist with different peak current ratings, feedback type (encoder/resolver), or digital interface level.

The servo drive is the core of axis control: it receives the position or speed reference from the CNC controller, closes the current loop on the servo motor, and guarantees accurate contouring fidelity throughout the machining cycle. A failure in this module causes total loss of control of the affected axis, resulting in an immediate machine stop and inability to run any work cycle, with consequent production downtime and a risk of dimensional scrap if the fault occurs mid-operation.

NSK Ltd. (Nippon Seiko K.K.) is a Japanese multinational founded in 1916 and a world leader in the manufacture of precision ball and roller bearings. Over the decades the company expanded its portfolio to include linear motion systems (ball screws, linear guides) and electronic components for precision machine tools, including servo drives from the ESA series. Products in this family are legacy / discontinued: mainly available as used parts, NOS surplus, or through specialist repair centres.

Main Technical Specifications

CNC Electric Motor – NSK Y4082

The Y4082 is a CNC machine tool electric motor (“CNC Electric Motor”) manufactured by NSK Ltd., designed for use as an axis or spindle actuator in machining centres and CNC machine tools. The motor interfaces with the dedicated drive/inverter of the control system, delivering the dynamic performance required by high-precision machining cycles. Refer to the machine documentation to confirm compatible revisions and variants.

The motor is the primary actuator of the axis or spindle: it converts electrical energy into mechanical torque and responds in real time to CNC commands for positioning, speed and acceleration. A motor failure causes immediate shutdown of the affected axis, resulting in total machine downtime and inability to complete the machining cycle; in continuous-production environments even a short stoppage incurs significant losses.

NSK Ltd. (Nihon Seiko Kabushiki Kaisha) is a Japanese manufacturer founded in 1916, Japan’s first ball bearing producer and today a world leader in precision bearings, linear technology and CNC machine tool components. NSK’s motion control division supplies high-precision motors and actuators to major OEM machine tool builders worldwide. Availability of the specific part number should be verified, as some series of NSK CNC motors may be legacy / discontinued.

Main Technical Specifications

Servo Amplifier Drive – NSK ESA-Y2020T25-21

The ESA-Y2020T25-21 is an electric servo amplifier / servo drive (“Electric Servo Amplifier”) manufactured by NSK, belonging to the ESA-Y series. Designed for vector control of brushless servo motors with a transistor-based power stage, the module is rated for a nominal output current of 25 A (T25 designation). The unit is intended for CNC machining centres, precision grinding machines, and high-dynamic positioning systems. It manages the motor current and speed control loops, receiving digital or analogue references from the CNC controller and generating PWM modulation on the power stage.

The servo amplifier is the key element of the drive chain: it converts the speed or torque reference provided by the CNC into three-phase current applied to the servo motor windings, ensuring that the programmed trajectory is followed with minimal tracking error. A failure of this module results in complete loss of control of the axis or spindle it serves: the machine stops in alarm and machining cannot resume until the drive is replaced or repaired.

NSK Ltd. (Nippon Seiko K.K.), founded in Japan in 1916, is one of the world’s leading manufacturers of rolling bearings, linear guides, and precision mechatronics. The NSK Precision division develops motors, drives, and integrated systems for high-precision CNC applications. All products in the ESA series are legacy / discontinued and available exclusively as used or surplus components or through specialist repair services.

Main Technical Specifications

Servo Drive – NSK ES2020A23-03

The ES2020A23-03 is a servo drive (“Servo Drive / Servo Amplifier”) manufactured by NSK, belonging to the ES2020 series (variant A23, revision 03). The component is designed for axis control applications in precision motion systems for CNC machine tools, typically machining centres, grinding machines and high-precision positioning systems. The drive manages the position, speed and current control loops for the associated servo motor, receiving references from the numerical control unit and converting them into regulated currents delivered to the motor. The part number structure identifies the ES2020 series, variant A23, revision 03; variants with different current ranges or motor compatibility may exist.

The servo drive is the electronic component that acts as the power interface between the CNC controller and the axis servo motor: it receives position and speed commands from the control unit and converts them into regulated currents that actuate the motor with the required precision. In the event of failure, the controlled axis becomes inoperable — the machine loses the ability to move the affected axis, resulting in an immediate production stoppage and inability to maintain machining tolerances.

NSK Ltd. (Nippon Seiko Kabushiki-gaisha) was founded in 1916 in Japan and is one of the world’s largest manufacturers of precision bearings and motion control systems. In the machine tool sector, NSK is renowned for high-speed spindle bearings, linear guides, ball screws and servo drive systems for precision applications. Components from the ES2020 series are legacy products: discontinued, available only as used, surplus or through specialist repair services.

Main Technical Specifications