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Standard

Metric Countersunk Holes for Cutting Edges and End Bits

2011-10-27
CURRENT
J1580_201110
this document is to be used on cutting edges and end bits in conjunction with metric bolts (reference ISO 7852-1982) typically used on off-road, self-propelled work machines as described in SAE J1116. The cutting edges are further defined in SAE J737, J739, J1304, and J1581. The end bits are further defined in SAE J63.
Standard

Countersunk Square Holes for Cutting Edges and End Bits

2011-10-25
CURRENT
J740_201110
To be used on cutting edges and end bits in conjunction with No. 3 head plow bolts (Ref. ANSI B18.9) typically used on off-road self-propelled work machines as described in SAE J1116. Cutting edges are further defined in SAE J737, J739 and J1304. End bits are further defined in SAE J63. 1 When section thickness exceeds A in drawing 1 (Figure 2) (countersunk one side) or B in drawing 4 (countersunk both sides), use counterbore with diameter D, as shown in cross section drawings 2, 5 and 6, or extended countersink C, as shown in cross section drawings 3 and 7. 2 The inscribed circle of the square holes shall be concentric with countersink or counterbore within 0.03 in (0.8 mm).
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