Silicone Rubber Seals for Moving Parts and Rotating Applications

Silicone Rubber Seals for Moving Parts & Rotating Applications

Specifically formulated for shafts, swivels, and rotary unions — our silicone elastomers combine resilience with low hysteresis. Suitable for high-speed rotation, oscillation, and linear reciprocation without compromising seal integrity.

◈ performance benchmarks

 rotational test data

Parameter	Grade HS‑R60	Grade HS‑R70
Hardness (Shore A)	60	70
Tensile strength (MPa)	8.2	10.5
Max surface speed (m/s)	12	15
Friction coefficient (greased)	0.22	0.19

 dimensional availability (inch/mm)

Profile	Shaft diameter range	Cross‑section
Rotary lip seal	6 – 300 mm (0.25‑12″)	2 – 12 mm
Oscillating wiper	10 – 250 mm	3 – 10 mm
PTFE‑coated rotary	12 – 400 mm	2.5 – 15 mm
Custom profile	any	engineered

Rotation, oscillation, and beyond

Silicone’s unique viscoelasticity dampens vibration in high‑speed spindles and reduces noise in cam followers. Unlike conventional nitrile, silicone maintains sealing force even after prolonged dwell periods — no permanent set. For rotating applications with particulate exposure, our HDR compounds resist abrasive wear while protecting the shaft from scoring.

In recent tests, HS‑R70 completed 80 million oscillations at 5 Hz with leakage below 0.1 mg/h. The material also tolerates momentary dry start‑up, a common issue in intermittently lubricated systems.