Why do electric forklift roller bearings need polyurethane seals?

1. Severe challenges of electric forklift sealing
Electric forklifts need to deal with multiple challenges such as dust intrusion, frequent start-stop shock, extreme temperature range (-30℃ to 80℃) and chemical medium corrosion in scenarios such as warehousing logistics and cold chain transportation. Traditional rubber seals are prone to seal failure due to elastic fatigue, low-temperature embrittlement or chemical corrosion, which in turn causes problems such as bearing wear and grease leakage, greatly shortening the service life of the equipment.

2. Core technical advantages of polyurethane seals
As a forklift bearing manufacturer, we choose polyurethane (PU) materials because they can systematically solve the sealing pain points of electric forklifts:
Dynamic sealing performance: The high resilience of polyurethane can fit tightly to the journal, and can maintain stable sealing even under vibration conditions, and the leakage rate is reduced by more than 60% compared with traditional materials. The double-layer sealing design (main dustproof + auxiliary leakproof) further blocks the intrusion path of pollutants.
Environmental adaptability: From -40℃ low-temperature cold storage to high-temperature continuous operation, polyurethane can maintain a stable elastic modulus, while withstanding corrosion from hydraulic oil, weak acid and alkali, and its service life is three times that of rubber seals.
Energy efficiency and durability: By adding self-lubricating modified materials, the friction coefficient can be controlled below 0.05, reducing the stick-slip phenomenon during start-stop; the optimized structural design reduces rolling resistance by 15%, indirectly improving the endurance of electric forklifts.
As a professional manufacturer with 20 years of experience in the field of forklift bearings, FTM Bearing is committed to providing more reliable, smarter and more environmentally friendly sealing solutions to global customers. We are not only a product supplier, but also your strategic partner for bearing management throughout the life cycle.