Center Drill Bit is also known as Slocombe Drills, Centre Drills were originally designed to create the countersink required to locate a tailstock centre when turning between centres. They have a point angle of 60° to match the angle of a Tailstock Centre.
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A Centre Drill can also be used to provide a start location for a drill when drilling down the centre of a bar held in a Lathe chuck. Centre Drills are short and rigid enough to mark the bar centre without wandering off if they are carefully offered up to a rotating work-piece.
Magnetic pump maintenance and care
Magnetic pump maintenance and care (1) Check the magnetic pump lines and joints with loose phenomenon. Turn the magnetic pump by hand to see if the magnetic pump is flexible. (2) Add bearing lubricating oil to the bearing body, observe the oil level should be at the center line of the oil standard, lubricating oil should be replaced or replenished promptly. (3) Unscrew the diversion screw plug of the magnetic pump body, and pour water (or slurry). (4) close the outlet valve and outlet pressure gauges and import vacuum gauge. (5) Move the motor to see if the motor is steered correctly. (6) start the motor, when the normal operation of the magnetic pump, open the outlet pressure gauge and inlet vacuum pump as it shows the appropriate pressure, and gradually open the gate valve, while checking the motor load conditions. (7) try to control the flow and head of the magnetic pump in the range indicated on the plate to ensure that the maximum efficiency of the magnetic pump operation, in order to get the maximum energy-saving effect. (8) magnetic pump in operation, the bearing temperature can not exceed the ambient temperature 35C, the maximum temperature shall not exceed 80C. (9) If there is abnormal sound of magnetic pump should stop immediately check the reasons. (10) to stop using the magnetic pump, first close the gate valve, pressure gauge, and then stop the motor. (11) magnetic pump in the first month of work, after 100 hours to replace the oil, after every 500 hours, oil change time. (12) Often adjust the packing gland to ensure normal drip leakage in the packing room. (13) Regular inspection of the sleeve wear, wear and tear should be promptly replaced. (14) When the magnetic pump is used in the winter season, after stopping the pump, unscrew the drain plug at the lower part of the pump to release the media. Prevent cracking. (15) long-term deactivation of the magnetic pump, pump all the necessary open, dry the water, the rotating parts and joints coated with grease installed, properly protected