TOSC delivers high-performance hydraulic sealing systems for excavators and hydraulic breakers — main oil seals, breaker seal kits and repair kits built for extreme duty and extended service life.
Sealing solutions engineered for excavator and hydraulic breaker duty — from main seals to complete service kits.
Custom German rubber compound, high-pressure and extrusion resistant, designed for high-frequency impact duty.
View details →
Matched to original breaker specifications — main seal, wiper, O-rings and back-up rings in one kit.
View details →
Common seal combinations for the aftermarket — lean inventory, fast response, quick turnaround.
View details →From material chemistry to precision molding, every process follows German industrial standards.
High-performance PU and FKM composite systems — heat, wear and ozone resistant for mining and breaking duty.
High-tolerance molds and automated lines deliver micron-level consistency for zero-leak fit.
Every batch is fatigue, pressure and dimension tested — traceable data, stable and reliable quality.
From hydraulic breakers to excavators, wind turbines and oil fields — sealing solutions for the toughest environments.
Main seals and kits for Soosan, Furukawa, Atlas, Krupp, Daemo and more.
Full-machine kits: boom, arm, bucket, pump, valve, motor and center joint.
PPDI polyurethane for pitch & yaw systems, rated -30~130°C.
PUAR step seals with twice the service life of PTFE+Cu powder types.
From rock breaking in the mine to urban demolition and infrastructure works — TOSC seals keep machines running in the harshest conditions.
Tell us your breaker brand and model — our team will match the right seal kit and respond within 24 hours.