Free Engineering Tool
Shaft Seal Selection — ISO 6194
Select radial lip seals per ISO 6194. Enter shaft diameter, speed, and medium to get recommended seal type, dimensions, and material.
Recommendation
Peripheral Speed
Standard NBR lip seals: max ~12 m/s. FKM: ~14 m/s. PTFE: ~20 m/s.
Material Selection Guide
NBR (Nitrile): -40 to +100°C. Mineral oil, grease. General purpose. Most common.
FKM (Viton): -25 to +200°C. Synthetic oil, fuels, high temp. Premium choice.
PTFE: -60 to +200°C. Aggressive chemicals, high speed, dry running.
EPDM: -50 to +150°C. Water, steam, brake fluid. NOT compatible with mineral oil.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
