Coolant Ingress and Oil Seal Renewal
Coolants used in CNC machines or oil leaking from gearboxes can seep through worn motor oil seals. Fluid entering the motor blinds the encoder, makes the brake slip and short-circuits the stator windings. We armour the motor against external factors.
Fluid Ingress Symptoms
- Fluid/moisture inside the motor, corrosion
- Encoder fault after water or oil ingress
- Earth fault in the stator winding
- Brake slipping and insulation drop
Sealing & Overhaul Steps
We completely remove oil and chemicals using industrial ovens and special solvents, replace worn oil seals (V-ring, O-ring) with high-heat Viton/Teflon seals, renew insulation varnishes and perform leak tests. If the winding is affected we resolve it together with rewinding. See our services.
Why Permanent Sealing?
If fluid ingress recurs, the motor soon fails again. Correct seal selection and insulation renewal protect the motor against coolant and oil.
Frequently Asked Questions
What happens if fluid enters the motor?
It blinds the encoder, makes the brake slip and causes short-circuit/earth faults in the winding; cleaning and seal renewal are required.
Is replacing only the seal enough?
Not if fluid has reached the winding; cleaning, insulation varnishing and rewinding if needed are done together.
What if the winding is affected?
A winding with an earth fault is rewound; combined with seal renewal it provides a permanent solution.
Is there a warranty after repair?
Yes. After cleaning, sealing and insulation work the motor is leak-tested and delivered under warranty.