Howmet Aerospace - RCD Series Tooling - Step Drills for Aluminum Applications

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Items	RCD16-128 RCD Series Tooling - Step Drills for Aluminum Applications	RCD16-157 RCD Series Tooling - Step Drills for Aluminum Applications	RCD18-157 RCD Series Tooling - Step Drills for Aluminum Applications	RCD18-185 RCD Series Tooling - Step Drills for Aluminum Applications	RCD21-213 RCD Series Tooling - Step Drills for Aluminum Applications
Material Type	N/A High Speed Steel
Heat Treat	N/A Per Drill Manufacturer´s Standard
Finish	N/A Strippable Plastic Coat to Protect Cutting Edges (Tube Packaging Optional)
Size	N/A 16	N/A 16	N/A 18	N/A 18	N/A 21
A - Dia ±.0005	N/A 0.128 in	N/A 0.157 in	N/A 0.157 in	N/A 0.185 in	N/A 0.213 in
B - Dia¹	N/A 0.250 in	N/A 0.250 in	N/A 0.281 in	N/A 0.281 in	N/A 0.328 in
C ±.0050	N/A 0.312 in	N/A 0.312 in	N/A 0.375 in	N/A 0.375 in	N/A 0.437 in
D ±.2500	N/A 4.000 in	N/A 4.000 in	N/A 4.250 in	N/A 4.250 in	N/A 4.620 in
Notes	N/A <2> Conical point optional. Made from standard straight shank jobbers or screw machine twist drills. <6> Configuration applicable only for part number RCD72-625 thru RCD124-1094. Caution: Step drills are designed for thru hole drilling. When used to drill a blind hole, it may be necessary to grind the drill to suit the depth required.
¹ Drill Tolerances per ANSI B94.11M.