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Weights

Drill-Collar Weights (Donuts) are the most convenient and effective method known for applying weight to drill a straight hole. The reason: donuts put all of the weight at the bottom of the hole for the best plumb-bob effect possible. Common sizes of weights, available in interlocking halves or fourths, are listed in the chart below.

Split Weight Donut Specifications

O.D. (inches) I.D. (inches) Height (inches) Approx. Weight (lbs.)
42 16 5/8 18 5700
50 16 5/8 18 7200
60 16 5/8 18 11,200
84 62 18 11,200
126 84 18 26,380