About Us
Mohamed Nemar Abuadas Establishment is a pioneering leader in hydraulic maintenance and services in Saudi Arabia, headquartered in Riyadh.
Mohamed Nemar Abuadas Establishment is a pioneering leader in hydraulic maintenance and services in Saudi Arabia, headquartered in Riyadh.
Off-the-shelf seals rarely match the exact tolerances of custom-built cylinders. Our CNC seal fabrication service produces hydraulic seals to micron-level accuracy — ensuring zero leakage, extended service intervals, and compatibility with all major cylinder brands including Bosch Rexroth, Eaton, and HYDAC.
Commercial hydraulic cylinder seals are manufactured to tolerances that cover a range of bore and rod diameters. While this is acceptable for new, standard-specification cylinders, it becomes a significant problem for older cylinders with slight wear, re-bored cylinders, or custom-fabricated equipment.
A seal that is even 0.1–0.2mm oversize or undersize will either leak immediately or wear at an accelerated rate due to improper contact pressure. Neither outcome is acceptable in a critical industrial application.
The tolerance problem compounds with cylinder wear. As a cylinder bore wears over time, the effective diameter increases. A seal designed for the original specification will be undersized in a worn cylinder, resulting in inadequate sealing pressure and leakage.
For cylinders experiencing seal failure issues, our article on <Link href="/blog/hydraulic-cylinder-failure-causes">Common Causes of Hydraulic Cylinder Failure</Link> provides comprehensive diagnostic guidance.
At our workshop, cylinder dimensions are measured precisely using calibrated bore gauges and micrometers. The exact groove dimensions, bore diameter, rod diameter, and operating pressure are recorded before any seal material is selected or cut.
Seals are then machined on CNC lathes programmed to the specific dimensions of your cylinder. The result is a seal that matches the exact geometry of the groove and contact surfaces, achieving consistent sealing pressure across the full range of motion.
Our CNC equipment can produce seals from 20mm to 500mm diameter with tolerance as tight as ±0.01mm. This precision ensures that every seal performs exactly as designed, regardless of cylinder size or application.
We maintain a complete dimensional history for every cylinder we service. This data allows us to track wear patterns over time and predict when future seal replacement will be needed, enabling proactive maintenance scheduling.
NBR (Nitrile Butadiene Rubber) — The standard choice for mineral oil systems. Excellent resistance to petroleum-based fluids, suitable for temperatures from -30°C to +100°C.
Polyurethane (PU) — Superior abrasion resistance and high extrusion resistance under pressure. Ideal for high-pressure cylinders (above 250 bar) and applications with particulate contamination risk.
Material selection depends on operating temperature, pressure rating, fluid compatibility, and expected service life. Our technicians can recommend the optimal material based on your specific application requirements.
For systems operating in high-temperature environments like Saudi Arabia, consider materials with higher thermal stability. Our guide on <Link href="/blog/hydraulic-oil-saudi-conditions">Choosing the Right Hydraulic Oil</Link> discusses fluid and material compatibility in hot climates.
PTFE (Polytetrafluoroethylene) — Used for guide rings, backup rings, and wear rings. Extremely low friction coefficient, no stick-slip, and excellent chemical resistance. Essential for precise positioning cylinders.
Viton (FKM) — Required when the hydraulic system uses fire-resistant fluids (HFA, HFB, HFC type) or phosphate ester fluids. Also suitable for high-temperature applications above +100°C. We stock all four materials and cut to order for any cylinder size.
Specialty materials like HNBR (hydrogenated nitrile) offer improved heat and chemical resistance for demanding applications. EPDM is suitable for phosphate ester fluids and certain water-based hydraulic systems.
We maintain material compatibility charts for all major hydraulic fluid manufacturers. Always verify seal material compatibility before changing hydraulic fluid types to prevent seal degradation.
Customers who switch from standard off-the-shelf seals to our CNC-fabricated seals report service intervals 2–3 times longer before the next seal replacement is needed. This is a direct result of the correct fit — the seal operates within its designed compression range throughout the entire stroke.
Zero external leakage, reduced cylinder drift under load, and cleaner hydraulic fluid are the measurable outcomes. For systems where cylinder positioning is critical — such as presses, lifting equipment, and steering cylinders — custom seals are not optional. They are the correct engineering choice.
Extended seal life directly translates to reduced maintenance costs and less downtime. In high-utilization facilities, the cost savings from fewer seal replacements can exceed the initial cost difference of custom seals within the first year.
Cleaner hydraulic fluid extends the life of all system components — pumps, valves, and filters. The investment in precision seals pays dividends across the entire hydraulic system.
Custom seals are particularly valuable for rebuilt cylinders where bore dimensions have changed due to wear or machining. Re-boring a cylinder to remove scoring changes the effective diameter, requiring seals sized to the new dimensions.
Non-standard cylinder sizes from specialized equipment manufacturers often require custom seals. OEM seals may be unavailable, prohibitively expensive, or have long lead times. Our CNC service can produce replacement seals within 24–48 hours.
High-pressure applications above 350 bar benefit from custom seals designed with optimized cross-sections for the specific pressure rating. This reduces extrusion risk and extends seal life under demanding conditions.
For preventive maintenance programs, consider stocking custom seals for critical cylinders. Having seals on hand eliminates lead time and allows immediate replacement during scheduled maintenance windows.
Every seal we produce undergoes dimensional verification before shipment. We measure critical dimensions against the recorded cylinder specifications to ensure exact compliance.
For critical applications, we offer pressure testing services where the assembled cylinder is tested under load to verify seal performance before the cylinder is returned to service.
We provide complete documentation including material certificates, dimensional reports, and installation instructions. This documentation supports quality systems and provides traceability for maintenance records.
Our workmanship is guaranteed — if a seal fails due to manufacturing defect within the specified service life, we will replace it at no cost. This warranty demonstrates our confidence in the precision and quality of our CNC fabrication process.
Need custom-fabricated seals for your cylinders? Bring us your cylinder dimensions or send the cylinder to our workshop for measurement and seal production.
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Certified technicians. Genuine parts. Nationwide KSA coverage.
