A professional who positions, glues, and aligns agate bearings in scale housings and bridges, base plates, and spiders. Responsibilities include:

• Mixes cement ingredients according to formula.
• Cleans agate seats, using files.
• Positions part in holding fixture.
• Coats agates and part seats with cement, positions agates in seats, and screws clamp into fixture to hold agates in place.
• Places clamped part and fixture in oven to harden cement.
• Sights along rods or straightedge to verify alignment of agates.
• Repositions bearings to correct misalignment, using handtools, or resets agate bearing.