Sherline 33050 – DC Motor & Speed Keep an eye on Sherline 33050 DC Motor & Speed Keep an eye on The 90-volt DC motor provides far more than that of the 1/2 HP AC/DC motor we used to offer prior to 1994. A DC motor offers its maximum torque at low RPM where you wish to have it most, so the full speed horsepower rating of an AC/DC motor can be a little deceiving as far as offering practical, useable power. The DC motor also offers smoother and quieter operation. The motor now features externally replaceable brushes, making replacement of worn brushes a simple task taking only some minutes. To power and Keep an eye on the motor a more sophisticated speed Keep an eye on unit is required. The Keep an eye on we have developed accepts any incoming AC current from 100 VAC to 240 VAC, 50 or 60 Hz and automatically outputs 90 VDC to the motor, so this unit can be utilized anywhere on the planet without a transformer. All you wish to have is the correct wall plug or converter. In addition, a load compensating circuit has been designed into the controller. As load is applied, the speed Keep an eye on will add power to attempt to hold a constant speed. Once the on/off switch is switched to the ON position, a speed Keep an eye on knob is used to vary the speed over all the range. With the two-position pulley in the normal position on a Sherline headstock, the speed range is about 70 to 2800 RPM. In the high torque position the maximum speed is cut in half but torque at any given speed is much greater. If you’re the use of the motor in non-Sherline applications, the maximum no-load speed of the motor shaft itself is 6000 RPM. Shipping Delivery time: To keep shipping costs as little as conceivable we ship USPS Ground (7-10 day) Payment We accept the following payment methods: Paypal Service International Shipments: We cannot guarantee any specific delivery times.