Coolant tanks are indispensable for the operation of machine tools. However, when chips and sludge accumulate inside them, they cause a variety of problems in the workplace, such as clogged piping, scratches on workpieces, and the occurrence of defective products. To address these issues, Nippon Oil Pump Co., Ltd. (NOP) proposes the “Cyclone Filter Pump” , which integrates an impeller pump and cyclone filter into a single unit.

This product adopts patented technology that integrates the pump and cyclone filter into a single unit. While it is common to install them separately, NOP makes it possible to complete the system with just one unit, enabling space-saving and simplified piping design. It offers a maximum flow rate of 150 L/min, as well as a large-capacity type with 300 L/min, and a head of 35–65 m, providing sufficient performance to support a wide range of machines such as machining centers, lathes, and grinding machines.

Cost Benefits and Long-Life Design

One of the greatest advantages of introducing the Cyclone Filter Pump is its cost benefit. In conventional systems, the pump and filter are designed and installed separately, which tends to result in high costs. However, with NOP’s integrated Cyclone Filter Pump, equipment costs can be reduced by approximately half. Furthermore, since there is no filter clogging, the pump has a long service life and requires fewer replacements, contributing to a reduction in running costs.

Significant Reduction in Maintenance Burden

Another major advantage is the reduction in the workload of tank cleaning. In large-scale factories in Thailand, where hundreds of machine tools are often installed, cleaning tasks are often neglected due to limited staff. The NOP pump efficiently separates sludge internally and circulates only clean coolant, making frequent cleaning operations unnecessary. In addition, the stirring effect inside the tank helps to suppress the sedimentation of chips.

▲【Left】Casting sludge [Right] Aluminum sludge

▲ 【Left】 Conventional design discharges coolant containing sludge. [Right] NOP cyclone filter pump discharges clean, filtered coolant.

Proven Coolant Cleaning Effect

In actual installation cases, the effectiveness has been clearly demonstrated.

Case 1: Coolant Cleaning in a Grinding Machine
A large amount of contamination used to settle at the bottom of the tank, requiring coolant replacement and waste oil disposal twice a year. However, after the introduction of the Cyclone Filter Pump, contaminants were efficiently removed, and a clean tank environment could be maintained.

Case 2: Reduction of Defect Rate in NC Lathes
In NC lathes, aluminum chips often caused tool seating failures and scratches on products, but after installation, the defect rate was reduced by half.

Case 3: Coolant Pipe Clogging in Machining Centers
In machining centers, clogging of coolant pipes that had previously occurred every three months was resolved. In addition, the system could replace two conventional pumps with just one, greatly contributing to energy savings and stable operation.