Dec 28, 2006 · I have a repair job to do which requires my drilling & reaming some holes in hardened (or casehardened) steel. The part is the "spline cup" in the rear wheel of an 1970 BMW R 60 motorcycle.
In the late 80′s, the Aftermarket Industry began drilling their lug holes with a conical seat instead of the Mag Type lug hole. It was then discovered that the use of a standard lug nut (Acorn Type) was causing problems with the seating area of the wheel.
Feb 26, 2010 · With the bit rotating, the tip of the drill bit is always central to the rotation, and central to the hole it's drilling (not the piece the hole is being drilled in, obviously, but the hole itself). This does nothing to center the hole, but it does drill a very nice, perfectly straight hole, which is the point of drill bits.
How to drill a hole in AR500 steel targets? - AR15.COM
Feb 07, 2014 · I have drilled 1/4-1/2 in holes in 3/8ths mild steel plate very easily with an Irwin unibit on my drill press. Usually drill a small pilot hole first the same size as the unibit starter size then center it up and start drilling. Slow, steady pressure and lots of lube.
Use it with arbor 49-57-0030 on Milwaukee's 4262-1 magnetic drill press or arbor 49-57-0010 on Milwaukee's 4292-1 mag press. The 1" bit diameter has a metric thread size of M18 x 1.5" shank. Use the Threaded Steel Hawg with a No. 3 Morse Taper Arbor Assembly 49-57-0010.
Sep 02, 2009 · Re: Steel I Beam Question Last september I learned a tough lesson about drilling steel. I needed to enlargen an existing hole on a column's baseplate(1/2" steel). I stepped up the bit size to take it from a 9/16 hole to an 11/16 one. On the third hole the 1/2 inch drill that I was using bound up and cammed.
Dec 15, 2010 · (Think drilling a few holes between sharpenings compared to a hundred or more per grind with the diamond wheel). If you look at the edge of your carbide tool under a loupe after you grind with a green wheel and then again after you use a diamond wheel you will see why; the green wheel isn't much harder than the carbide so it …
Jul 21, 2010 · "RE: Drilling wheel studs or lug nuts" In response to Reply # 6 The custom wheels prevented me from being able to get at the bolts or the nuts, they were too far into the wheel holes where the bolt and nut sit inside of.
Steel Inserting. JWR is able to provide precision Wheel drilling, steel inserting, fill and drill, and center boring to any aluminum wheel. We are able to change bolt patterns (lug holes) or repair them from loose lug nut damage.
Feb 04, 2011 · Larger studs could work, but by the time you get done re-drilling the wheels, axles/hubs, discs/drums, re-chamfering the holes in the wheels, and buying and installing all new hardware, you will have spent way more money, time and effort.
How to Drill Into Steel Like a Pro - Ask the Builder
Step Three: If you're drilling a large diameter hole, say 3/8-inch or larger, you'll want to drill smaller pilot holes first in the metal. Start with a 1/8-inch hole and then next use a 1/4-inch bit to enlarge the hole.