TC Oil Seals - Durus

What Is a TC Oil Seal?

The TC type is the workhorse industrial oil seal: Type C case (a steel inner case fully encapsulated in elastomer) combined with the Standard lip configuration (primary sealing lip with garter spring + auxiliary dust lip). The rubber-coated OD seals against bore tolerance variations, prevents damage to softer housing materials during installation, and provides corrosion protection. The double lip configuration handles industrial dust and dirt exposure.

Construction summary:
Case Type: C (full rubber coat)
Lip Configuration: Standard double lip

When to Choose TC

• General-purpose industrial sealing applications
• Soft housing materials (aluminum, cast iron with marginal bore finish)
• Environments with airborne dust or contamination
• When the bore tolerance is unknown or variable
• As the default first choice for any new application

When NOT to Choose TC

• Pristine hard-housing bores where Type B (bare metal) would suffice and cost less
• Applications where a single lip is specifically required for friction reduction (use SC instead)
• High-temperature applications above 250°F unless specified in Viton compound

Related Seal Types

Frequently Asked Questions

What does TC stand for in oil seal terminology?

TC is a Durus designation combining Type C case (the "C") with a primary sealing lip with garter spring plus an auxiliary dust lip (the "T" represents the standard double-lip lip configuration). The TC type is the most common general-purpose oil seal - equivalent to the CR/SKF designation "HMSA10" or "CRWA1" and similar configurations from other manufacturers.

When should I choose a TC oil seal over a TB?

Choose TC when your application involves any of: dust or dirt exposure (TC has a dust lip, TB does not), a soft or marginal-finish housing bore (the TC rubber coat protects against bore damage and accommodates tolerance variations), or when uncertain about operating conditions. Choose TB only when the application is verified clean and the housing is precision-bored hard material. TC is the default first choice.

Are TC oil seals interchangeable with CR HMSA10 or SKF parts?

Yes - TC is functionally equivalent to CR HMSA10, SKF CRW1, National 415, and most manufacturers' "double lip rubber-coated OD" designations. The dimensional fit (shaft × bore × width) and the case+lip construction are industry-standard. Texas Belting can cross-reference any equivalent part number - provide the original manufacturer part number and we'll match the Durus TC equivalent.

What are the most common applications for TC oil seals?

TC seals are the standard choice for: pump shaft sealing (centrifugal pumps, gear pumps, lobe pumps), gearbox input and output shaft sealing, conveyor roller end sealing, motor shaft sealing on industrial electric motors, agricultural equipment (where dust exposure is universal), and any rotating equipment in industrial environments where dust contact is possible. The full rubber coat plus double lip combination handles the widest range of operating conditions.