90
optibelt
ZRS Recommended pulleys – special constructions
Type OB Type EB Type ZB
Type OBN Type EBN Type ZBN
Explanation of abbreviations
OB = without flanges
EB = one flange
ZB = two flanges
OBN = without flanges with hub
EBN = one flange with hub
ZBN = two flanges with hub
Materials
Steel, cast iron, aluminium;
other materials on request.
For speeds > 30 m/s, do not use cast iron pulleys.
Bores
All pulleys are pilot bored. Finish bores when specified have H7
tolerances.
Dimensions
The dimensions should be taken from pages 48 and 49.
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