Cut rounded holes in wood, plastic, PVC and ABS with this Hole Saw set! Made of heat treated 45 carbon steel this hole saw kit can easily withstand the rigors of cutting circles in wood, plasterboard or drywall. Features include a black oxide finish to prevent rust and pilot bit with a 135 degree split point for fast, With this powerful hole saw set, you`ll be able to drill large diameter holes quickly and efficiently.
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Structural advantages of hot oil pump
The heat pump is a second-generation product developed on the basis of digestion and absorption of foreign oil pumps. The basic structure of the heat pump is a single-stage single-suction cantilever foot support structure. The inlet of the pump is axial suction and the outlet is centered vertically upward. On the base. Heat-conducting oil pump support using double-ended ball bearing structure, the front end with lubricating oil lubrication, the rear end with grease lubrication, the middle of a guide tube, to observe the sealing at any time and the recovery of HTF. Heat pump with self-heating cooling structure, changing the traditional water-cooled structure, so that the structure is simple, small size, saving operating costs, good performance, reliable use. (1) The hot oil pump adopts the combination of packing seal and mechanical seal. The packing seal is made of high temperature resistant packing, which has good thermal adaptability. The mechanical seal is made of hard alloy with high mechanical strength and good wear resistance , To ensure the sealing performance under high temperature conditions. (2) The third generation of hot oil pump PTFE (lipstick) lip seal, the sealing performance has been a leap forward than the rubber seal reliability increased by 25 times, extremely corrosion resistance.