With Helix Line Lip Seals

HTCL
HTCL HTCL HTCL

HTCL

(Anti-clockwise)
HTCR
HTCR HTCR HTCR

HTCR

(Clockwise)
HTGW
HTGW HTGW HTGW

HTGW

(Bi-direction)