Page 116 - Michigan Drill

Bonding Bits

High Speed Steel & Cobalt
Recommended for tough alloyed rails
HOLE MAKING Cobalt/Nitride Coated – 145° Notched Point H.S. Rail Web Type – 135° Split Point

List No. 366 – Cobalt, Flatted Shank
List No. 366R – Cobalt, Round Shank
List No. 366N – Nitride Coated Cobalt, Flatted Shank
List No. 363 – Flatted Shank
List No. 366RN – Nitride Coated Cobalt, Round Shank
List No. 363R – Round Shank

Price Each Price Each
Cobalt N. Coated Cobalt
Flute
Overall
Diameter Length Length Flatted Round Diameter Flute Overall Flatted Round
Round
Flatted
366N 366RN Length Length 363 363R
3/8 1-3/4 3 15.59 13.76 17.15 14.63 3/8 1-1/2 3 7.61 6.25
H.S. Rail Head Type – 118° Point H.S. Universal Type – 118° Point
List No. 364 – Flatted Shank List No. 365 – Flatted Shank
List No. 364R – Round Shank List No. 365R – Round Shank

Price Each Price Each
Flute Overall Flatted Round Flute Overall Flatted Round
Diameter Diameter
Length Length 364 364R Length Length 365 365R
3/8 1" 3 7.61 6.25 3/8 1-3/4 3 7.61 6.25

Tie Boring Bits

High Speed Steel

Single Flute
List No. 380F – 90° Point, Flatted Shank
List No. 380R – 90° Point, Round Shank
Price Each
Flute
Diameter Length Overall Flatted Round The single flute design can be used successfully in
Length
380R
380F
hand-held drill motor applications with less operator fatigue.
9/16 6-3/8 9-3/8 39.80 36.83 The tool acts in a screw-like movement, feeding itself into
5/8 6-3/8 9-3/8 49.77 46.79 the material while removing maximum chip volume.
Two Flute
List No. 370F – 70° Point, Flatted Shank
List No. 370R – 70° Point, Round Shank These tools are specifically designed for drilling spike
List No. 390F – 90° Point, Flatted Shank holes in wooden ties.They combine ease of penetration
List No. 390R – 90° Point, Round Shank with rapid chip removal in deep hole, hardwood drilling.
List No. 390SS – 90° Point, Set Screw
Price Each
70° Point 90° Point
Flute
Diameter Length Overall Flatted Round Flatted Round Set Screw
Length
370F 370R 390F 390R 390SS
9/16 6-3/8 9-3/8 38.93 36.83 41.26 38.49 41.27
5/8 6-3/8 9-3/8 51.82 48.51 51.82 48.51 ––
3/4 6-3/8 9-3/8 –– –– 74.21 72.14 ––

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