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14 Step Process

Inspecting Mounting

STEP (1)

Inspect the mounting for structural or casting defects, size and pre-finish.

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STEP (2)

Examine the stones with a 10x eye loupe or microscope paying attention to the parallel grooves cut into the pavilions.

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STEP (3)

Using a digital micrometer, measure each stone's width from girdle to girdle.

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STEP (4)

Measure from the center of each rail to ensure that the stones will fit. In this example, it should measure approximately 3.1mm. If the mounting is domed in all direction, you will have to calculate additional space between each row, since the stones will draw closer together as they are pressed into the mounting during tightening.

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STEP (5)

Make precise measurements of the of the parallel grooves. This will determine the approximate inside width that you will cut the channel.

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STEP (6)

Using a ball burr or other appropriately shaped burr, enlarge the inside of the channel walls, starting with the center channel. Enlarge the channel opening to measure 0.01mm less than the width of the parallel grooves on the stone.

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STEP (7)

Cut the tops of the rails with a 90 degree square graver, so they resemble the letter V. Extreme caution must be taken to maintain a straight cut in the center of each rail.

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STEP (8)

Use a round graver to soften the V shape that was cut by the square graver. This makes it easier for the metal to expand into the grooves of the stones as they are tapped downward and set.

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STEP (9)

Inspect all stones for fit using a 10x loupe or microscope to make sure they do not overlap or touch in any way.

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STEP (10)

Undercut the outside channel walls using a hart burr that less had its pavilion ground off. Removing the pavilion portion of the hart allows for the necessary clearance to make these undercut with out distorting the tips of the rails.

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STEP (11)

Begin to trail fit the stones into the center row. Adjust the inside width of the rails with a ball burr or round graver until the grooves on the stones clear the rails and snap into place.

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STEP (12)

Trail fit the stones into each row starting with the center row. Make any necessary adjustments needed to maintain an orderly fit. Keep track of each stones's location while trail fitting.

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STEP (13)

Using a chopstick or small wooden dowel as a punch, tap the punch lightly with a chasing hammer. Taper the punch to ensure that it covers only one stone at a time. The downward force causes the thin tips of the rail to flare outward, filling the grooves and locking the stone in place. Tap the outer channel wall as necessary with a channel setting punch.

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STEP (14)

Check the security of each stone.



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