Hole Saws and Arbors
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Arbors
Most hole saw manufacturers provide some way of holding the saw. This is usually done in a less than precise way.
For improved precision and more ridgid foundation to your saws, use an arbor For threaded drill chucks. These are available from several suppliers, but one of the cheapest I found was Victor Machinery Exchange, Inc.
Index of VME drill chuck arbors:
DCA-1/2-3824 1/2" Straight to 3/8"-24 Drill Chuck Arbor $5.90
DCA-1/2-1220 1/2" Straight to 1/2"-20 Drill Chuck Arbor $5.90
DCA-1/2-5816 1/2" Straight to 5/8"-16 Drill Chuck Arbor $5.90
DCA-R8-5816 R8 Taper to 5/8"-16 Drill Chuck Arbor $13.00