IBM 1402 Reference Manual page 64

ADJUSTMENT OF RADIAL STACKER CARD GUIDES
MALFORMED RADIAL CARD GUIDES CAN BE A
CAUSE OF CARD JAMMING. THESE GUIDES
SHOULD BE FORMED ACCORDING TO THE
ILLUSTRATED PROFILE. DO NOT DISTORT THIS
PROFILE TO ACCOMPLISH INSTALLATION.
Figure 5-2. 51-80 Radial Card Guide Profile
5-2