A professional who positions flat pieces, such as clutch levers and escape wheels, on circular metal blocks or into recesses in blocks preparatory to grinding operation. Responsibilities include:

• Heats block and applies shellac.
• Places pieces over surface of block, using tweezers.
• Reheats block, places sheet of paper on top of block, fits press block directly over circular block, and applies pressure in screw press to position pieces firmly in shellac.
• Removes pieces from press, and inspects parts for proper position prior to grinding process.
• Blocks parts, such as wheels and screws, using suction device.
• Heats, shellacs, and presses loaded blocks to secure parts.
• May spread layer of vaseline over block to hold parts.