HOW TO INDICATE A HELIX LIP DESIGN If your design includes a helix lip, the appropriate suffix must be added to the part number. Add the suffix CW if the shaft rotates in a clockwise direction when viewed from the air side of the seal; CCW if the shaft rotates in a counterclockwise direction when viewed from the air side of the seal. Add the suffix BD for a shaft rotating in both directions.

Helix Lip Identification
Helix Lip Key

EXAMPLE: The following metric part number includes a unidirectional helix lip for a shaft rotating in a counterclockwise direction: 50X72-8TC-RV/CCW

INTERNALLY LUBRICATED COMPOUNDS


For special applications where shaft rotation may start without lubrication present at the seal lip, internal lubricants can be added to the elastomer to reduce wear. This can be indicated in the part number by the suffix /moly.


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