PMB33C-20200-00
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The PMB33C-20200-00 is a high-precision ball screw with a 20 mm shaft diameter and a right-handed thread direction. Manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series, it features an accuracy grade of C5. With a dynamic load rating of 9.0 kN, it is made from durable rolled steel material.
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Product Description:
The Pacific Scientific’s AC motor PMB33C-20200-00 is optimized for 240 V supply source and it delivers a peak rated torque of 16.1 Nm. It includes MS-type lockable connectors for separate feedback and power connections, each provided cable measures 457.0 mm in length and uses shielded wires with a minimum bending radius rated as 57.20 mm for cable routing.
The PMB33C-20200-00 servo motor is accompanied by a square configuration of shaft with a mechanical key for balancing and the shaft diameter is 12.7 mm. The motor’s overall length measures 210.3 mm with a face width of 87.4 mm. It features mounting bolt circles of 5.59 mm that are 98.4 mm equally apart for installation through screws and it has a total weight 6.3 kg. The PMB33C motor is equipped with resolver feedback for accurate positioning and its insulation class is rated F. Its construction includes double-shielded bearings for extended operational life and it uses exposed lamination design for better torque and power, while its protective rating of IP40 allows operations in safe enclosed conditions. This PMB33C motor generates a stationary state torque output of 5.42 Nm and its continuous torque output during operation is 4.84 Nm. Its torque constant is 1.86 Nm/Arms and it produces an EMF of value 1.11 Vrms/rad/second.
The PMB33C-20200-00 servo motor features an operating speed of 1300 RPM and it utilizes 2.9 Arms in continuous mode while its maximum current pull is rated as 8.7 Arms. Its winding resistance is 8.6 Ohms and inductance 27.2 mH. The rotor inertia is measured as 0.000403 kg·m² to tackle dynamic responses in automated machinery and robotics. This PMB33C motor uses 26 AWG cable for feedback and 18 AWG for power connectivity.
Frequently Asked Questions about PMB33C-20200-00:
Q: How does the resolver feedback improve performance in the PMB33C-20200-00?
A: The resolver feedback ensures high-precision angular position sensing with immunity to electrical noise. This enhances control accuracy and smooth positioning in real-time applications.
Q: Why are double-shielded bearings important in the PMB33C-20200-00?
A: The double shielding lowers contamination ingress and retains lubrication longer. That improves reliability and lifespan under continuous or harsh operating conditions.
Q: What advantage does the exposed lamination design offer in the PMB33C-20200-00?
A: This design reduces eddy-current losses and improves magnetic flux density. The result is higher torque efficiency and reduced heat generation during operation.
Q: Why is a square shaft with a mechanical key used in the PMB33C-20200-00?
A: The square keyed shaft prevents slippage under high torque load by providing a positive mechanical lock. This ensures consistent torque transfer and alignment stability under dynamic loads.
Q: Why is the PMB33C-20200-00 optimized specifically for a 240 V supply?
A: The motor’s winding impedance and insulation are tuned for that voltage to optimize current draw and thermal behavior. This ensures efficient torque generation without undue stress on components.
