200-125 300-115 200-105 200-310 640-911 300-075 300-320 300-360 642-998 QV_DEVELOPER_01 400-101 700-501 117-201 70-696 700-505 600-199 400-351 300-207 TE0-141 100-105 300-101 300-206 300-070 70-417 210-260 210-060 200-355 300-208 CISSP 300-135 210-065 300-209 70-243 70-480 CCA-500 2V0-621D 210-451 400-051 E05-001 1Z0-052 70-410 640-916 VMCE_V9 810-403 070-464 070-243 700-802 70-246 FCBA GPHR DEV-401 C2090-610 SY0-401 712-50 ADM-201 700-039 312-50 MA0-101 648-244 SK0-004 ASF 70-494 70-673 500-005 1Z0-060 C9560-503 640-875 N10-006 98-367 70-534 NS0-505 70-342 CHFP 070-410 640-878 1V0-603 1Z0-804 C8010-250 312-50V9 C2150-508 98-368 CLOUDF 70-411 70-461 220-901 70-488 070-341 PK0-003 E20-547 70-412 70-686 500-285 CISM 101-400 102-400 PDM_2002001060 JN0-100 642-883 CAP 070-347

General Crowning

Circular/radius crowns are preferred over bevels with flats.

For belts up to 3″ wide:
Min. Crowning=1.6% of belt width (1″ belt=.016 crown)
Max. Crowning=2.5% of belt width (1″ belt=.025 crown)

For belts over 3″ wide:
Min. Crowning=0.5% of belt width (5″ belt=.026 crown)
Max. Crowning=1.6% of belt width (5″ belt=.080 crown)

crowning

Unless unusual tracking problems exist, minimum recommended crowning should be chosen, since ideal properties are developed through uniform belt to pulley contact. If an extreme crown is chosen for use with a stable belt, the full belt width will not be able to stretch and conform to the pulley crown, leaving the percentage of the belt width, not the pulley width. Crown choice is primarily affected by belt styles, installation tension and the degree of precision found in the machine drive alignment.

Additional considerations include specific drive details such as required torque or horsepower to be delivered, pulley diameters and drive speeds which must be known for proper belt selection and adequate belt sizing for the application.

Any adverse conditions which the belt may encounter, such as extreme temperatures, hostile chemical environments or severe abrasion should be considered as should other specific properties required, such as specific belt thickness, anti-static requirements or FDA approval.

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