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Series 490
Undercut drills with extra long flute lengths designed for very thick back-panel board constructions.
Made-to-order item. Delivery lead times may apply.
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Standard part numbers include rings. For ringless, replace the Series "." with "-"
(e.g. ringless Series 490, #78: 490.0160.325)
Diameter
Flute Length
Part Number
#78
0.0160"
8.26 mm
0.325"
490.0160.325
#77
0.0180"
490.0180.325
#76
0.0200"
10.16 mm
0.400"
490.0200.400
#75
0.0210"
490.0210.400
#74
0.0225"
490.0225.430
#73
0.0240"
12.00 mm
0.475"
490.0240.475
#72
0.0250"
490.0250.475
#71
0.0260"
490.0260.475
#70
0.0280"
13.34 mm
0.525"
490.0280.525
#69
0.0292"
490.0292.525
#68
0.0310"
490.0310.525
#67
0.0320"
490.0320.525
#66
0.0330"
490.0330.525
#64
0.0360"
490.0360.525
#62
0.0380"
490.0380.525
#60
0.0400"
490.0400.525
#58
0.0420"
490.0420.525
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