Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Drilling and tapping 200+ 3/8" holes in 3/4" aluminum
I bought a couple of 3/4" thick aluminum fixture plates.
http://igor.chudov.com/tmp/Fixture-Plate.jpg It was a local sale. I would like to drill and tap them with 5/16" drill and 3/8" tap, say spaced at 1" interval. That makes for about 200 holes to be drilled and tapped on my CNC mill. Some questions. 1. What is the best way to drill aluminum with 5/16" drill bit, making through holes. What RPM and feedrate and how often to peck. 2. Do I need to center drill those holes first? It is not really a big deal, just some more G codes. 3. For tapping, can I safely use a ER colleted floating tap holder that has a little bit of vertical internal travel. Like this one: http://www.maritool.com/p67/ER25-Flo...duct_info.html |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
drilling 5/8 -- 3/4" holes manuall | Metalworking | |||
Drilling a heap of 25mm / 1" holes in sheet metal | Metalworking | |||
FS: 1952 Reynolds Aluminum book: "Machining Aluminum Alloys" | Metalworking |