In reducers and gearboxes, NAK oil seals are mainly installed at the input/output shaft ends and gearbox rotating shafts, adapting to working conditions such as low to medium-high speed, oil temperature changes, continuous operation, and gear oil splashing. Their core function is to prevent gear oil leakage, avoid gear and bearing burnout caused by oil shortage due to oil leakage, and at the same time prevent external dust and metal debris from entering the box, reduce tooth surface wear and lower equipment operating noise. Common models are TC, SC, VC and other skeleton oil seals, which can be flexibly matched according to shaft diameter and pressure level.

The output shaft and bearing chamber sealing parts of industrial motors are another important application scenario for NAK oil seals. Such equipment operates continuously for a long time in environments with high vibration, high temperature, and much dust and humidity. NAK oil seals can protect bearing grease from loss, avoid dry friction, overheating, seizure and other problems of bearings, and effectively block dust and water vapor from entering the motor interior, reduce motor insulation aging, lower the failure shutdown rate, and ensure stable operation of equipment.

Power tools such as electric drills, angle grinders, and electric saws use NAK oil seals at the sealing parts of their main shafts, gearboxes, and rotor shafts. These tools have the characteristics of high-frequency start-stop, large impact load, high speed, hand-held use, and extremely dusty operating environment. NAK oil seals can maintain good sealing performance under the dual test of vibration and high-speed operation, prevent grease from being thrown out, and achieve strong dust prevention through a multi-lip structure, effectively extending tool service life and reducing maintenance frequency.

Various pumps, including centrifugal pumps, vacuum pumps, gear pumps, etc., are equipped with NAK oil seals at their pump shaft and bearing seat sealing positions. Pumps work with a variety of media, including water, oil, chemical liquids, etc., and have working conditions such as pressure fluctuations, high-speed rotation, and large temperature changes. NAK oil seals can prevent the conveyed medium from leaking along the shaft, which not only improves pump operation efficiency but also avoids on-site pollution, and protects bearings from medium erosion to extend bearing service life; the official website specifically mentions that the PA series vacuum pump dedicated seals are suitable for high-vacuum and clean environments such as semiconductors.

Industrial robotic arms (industrial robots) also rely on NAK oil seals at the joints of harmonic/RV reducers, servo motor shafts, and rotating joints. Such equipment needs to operate under working conditions of high precision, frequent start-stop, and repeated rotation, and most of them are in clean rooms or oil-polluted environments. NAK oil seals can achieve low friction and high sealing effect on the premise of ensuring flexible rotation of the equipment, prevent internal grease leakage from the joints, and block external dust from entering, maintain long-term positioning accuracy of the equipment, and reduce maintenance frequency.

The main shaft, gearbox, and pitch/yaw bearing sealing parts of wind turbines are equipped with NAK oil seal special products. Wind turbines are always in outdoor environments, facing working conditions such as large temperature differences between day and night, wind, sand, rain and snow erosion, and low-speed heavy load, and have a long service life requirement of more than 20 years for seals. NAK oil seals adopt anti-aging and low-temperature resistant formulas, which can achieve long-term sealing without leakage, and at the same time achieve dust and sand prevention through a multi-lip structure, greatly reducing wind farm maintenance costs and shutdown losses.

In the household appliance industry, NAK oil seals are also widely used, among which the drum shaft and bearing seat sealing parts of washing machines are the most common. When washing machines work, they face working conditions such as water and detergent immersion, alternating hot and cold, and rotating vibration, and have household mute requirements. NAK oil seals can effectively block water from entering the bearings, avoid bearing rust, seizure, and water leakage, and adopt a low-friction design to reduce equipment operation noise and improve the overall service life of washing machines.