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A set of simple clamps for mini-mills, it is using a thread rod for the balance support and can be fine adjusted to the suitable height for holding a work piece on the milling table.
Materials, a piece of 3/4" X 3/8" carbon steel bar. Any kind of steel will work, a 1018 carbon steel bar is used, and two pieces of thread rods, 1/4"-20 and 3/8"-16.
Cut 2 sets of thread rods for each clamp, 3 pieces are cut from the 3/8"-16 thread rod of 2", 3" and 4" long, and 3 pieces are cut from the 1/4"-20 thread rod with about 2.25", 3.25" and 4.25" long.
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The steel bar is used for making the clamps and T-nuts. Two pieces of 3" long for the clamps and two pieces of 0.75" long for the T-nuts.
The clamp is tapped with a 3/8"-16 threaded hole at 0.5" from one end, and mill a slot hole of 1/4" X 1.25". The other end is made with a slightly reduced size.
The width of the T-slot on the mini-mill table is 19 mm, 3/4" T-nut will just fit into the slot. The T-nuts are tapped with a 1/4"-20 threaded hole at the center.
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This is a setup of a 1/4" thick work piece. The work piece is rase up by a set of 1-2-3 blocks that the end mill can reach to the work piece.
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