Tolerance

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Tolerance
(a) A variation not exceeding ¼ inch will be permitted on all dimensions, except on shanks, where exact dimensions are required for fitting in supports.
(b) The following variations will be permitted in the approximate weight of bell given in the table, which does not include the weight of clapper and fittings:
- Not more than 5 percent above or below weight given for 20 -, 30 -, and 60 – pound bells.
- Not more than 4 percent above or below weight given for 75 – pound bells.
- Not more than 3 percent above or below weight given for 200 – and 300 – pound bells.
- Not more than 2 percent above or below weight given for 600 – and 800 – pound bells.
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