Parker Majestic has manufactured precision motorized spindles for over 73 years. Emphasis on quality, accuracy and longevity makes Parker Majestic the best choice for your production needs.

Parker Majestic specializes in precision fitting custom built AC Induction motors as well as AC Servo motors to the spindle shaft. Precision balancing of these units provides high accuracy and high speed capability in a compact spindle requiring no external drive components. Application of a vector-type control (for AC Induction) or servo drive system allows the user speed and positioning control. Parker Majestic’s manufacturing and assembly facilities are geared toward precision spindle manufacture and include the latest in CNC turning and grinding equipment, a temperature controlled assembly and inspection area and state-of-the-art coordinate measuring machines.

Contact Parker Majestic to select the proper motorized spindle for your application.

Horsepower – Heat Dissipation
Motor horsepower (HP) is a function of the size and the RPM of the motor. The larger the motor, the greater the horsepower at a given RPM.

Electric motors experience heat loss when in operation. When the heat loss is modest, the heat is dissipated by radiation. The totally enclosed non-vent motor (TENV) will dissipate heat by radiation. Motors that generate greater heat loss can be cooled with a fan that blows air over the motor. These motors are classified TEFC (totally enclosed fan-cooled.) When even greater horsepower is required in a smaller package, TELC (totally enclosed liquid-cooled) motors are used. These motors are cooled by circulating liquid around the motor.

Parker Majestic has many years of experience in the design and application of precision motorized spindles. Please contact the engineering department for additional information.

Variable Frequency Drives
Parker Majestic supplies motorized spindles for any speed up to 75,000 RPM. To operate at speeds other than 900, 1200, 1800 or 3600 RPM, a variable frequency drive is required. Parker Majestic furnishes solid-state variable frequency drives engineered to provide proper voltage and frequency to to the motorized spindle.

Variable frequency drives must be carefully matched to the motors they drive. Motors and variable frequency drives have pre-determined volts-to-hertz ratios, and these ratios must match for a successful application. Speed control can be integrated into your machine control for ramp-up, ramp-down and adjustment. This can be included in your machine program code or as an electrical control switch or dial.

Spindle Lubrication
High speed spindles require special bearing lubrication. Parker Majestic’s patented Micro-injection Lubricator fulfills these needs. This state-of-the-art air/oil lubrication system injects precise amounts of oil at controlled intervals for optimal bearing life and minimum heat generation. Utilizing only fractions of a drop per cycle means no environmental oil mist concerns. In addition the high air pressures used provide maximum protection against contamination of the spindle.