TC Oil Seal Double Lip NBR Nitrile Rotary Shaft Seal — ID 38–190mm

Measure three dimensions: the shaft inner diameter (ID), the housing bore outer diameter (OD), and the housing depth (height). Match all three to the variant label formatted as ID × OD × Height. For example, a 40×62×10mm seal fits a 40mm shaft, a 62mm bore, and a 10mm housing depth. If you only have inch measurements, multiply by 25.4 to convert — a 1.575" shaft is approximately 40mm, and a 2.441" bore is approximately 62mm.

TC-type oil seals are generally designed for low-to-medium pressure applications. They are typically rated for static pressures up to around 0.3 bar (4.4 psi). For higher-pressure environments — such as pressurized hydraulic circuits — a spring-loaded or PTFE-lipped seal is generally recommended instead.

NBR nitrile rubber generally offers good resistance to water, oils, and mild weather exposure. The double-lip design adds an extra layer of protection against moisture and dust ingress. However, for prolonged UV exposure or salt-spray environments, a Viton (FKM) seal is typically more durable. These seals are well-suited for most indoor machinery, agricultural equipment, and sheltered outdoor applications.

TC oil seals are not thread-specific — they seal around a rotating shaft by radial lip contact. They are compatible with metric shafts following ISO 6194 / DIN 3760 standards. The ID dimension must match your shaft diameter precisely for an effective seal. These are direct replacements for OEM TC seals of the same ID × OD × height specification.

NBR nitrile rubber typically operates reliably in a temperature range of approximately -40°F to +250°F (-40°C to +120°C). This covers most automotive, agricultural, and general industrial applications. For applications exceeding this range — such as high-temperature exhaust-adjacent sealing — a silicone or Viton seal is generally more appropriate.

NBR seals are generally compatible with petroleum-based oils, hydraulic fluids, water, and many common lubricants including gear oil and grease. They are not recommended for use with ketones (such as MEK or acetone), strong acids, or aromatic hydrocarbons. When in doubt, contact us to confirm compatibility with your specific fluid before ordering.

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the fluid it will be sealing (e.g., a thin film of gear oil). Press the seal squarely into the bore using a seal driver or a flat plate — never hammer directly on the rubber lip or seal face. The metal case should sit flush with or just below the housing surface. Avoid cocking the seal during installation, as this is a common cause of early leakage.