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NEMA 17 Three-Motor Storage Tray
A 146 x 62 x 12 mm bench or drawer tray that holds three spare NEMA 17 steppers upright on their backs, each in a 43.3 mm square pocket that fits the 42.3 mm motor body. The shafts stay pointing up and out of the way. A 24 mm push-up hole under each motor and finger notches in the walls make them easy to lift out, and a 9.5 mm trough along the front holds the M3 screws, pulleys and couplers that go with them.
NEMA 17 And NEMA 23 Panel Drilling Template
This 84 x 84 mm drill guide plate lets you drill stepper motor mounting holes in sheet metal, plywood or acrylic. It has 12 mm tall guide bushings for both patterns: a 31 mm square for NEMA 17 (3.4 mm holes for M3) and a 47.14 mm square for NEMA 23 (5.5 mm holes for M5). There is also a 3.4 mm centre hole for the hole-saw pilot, which you use to cut the 22 mm (or larger) boss opening. V-notches on the edges line up with scribed centre lines, so the motor ends up square and centred without measuring.