This precision 1-2-3 block machining jig is a professionally designed CAD model created to simplify and standardize the manufacturing of 1″ × 2″ × 3″ machinist blocks. The jig securely locates raw stock and ensures repeatable positioning for drilling, tapping, and milling operations, reducing setup time and improving accuracy.

Designed for CNC and manual machining workflows, this fixture helps maintain consistent hole spacing, squareness, and alignment across multiple parts. It is ideal for machine shops, toolmakers, educators, and students producing their own 1-2-3 blocks for shop use or training purposes.

The model features clean, robust geometry suitable for machining from steel or aluminum and can be easily adapted to different tolerances or block variations. Delivered as a high-quality CAD file, this jig is ready for manufacturing, modification, or integration into a fixture library.

Key Features:

Purpose-built jig for manufacturing standard 1″ × 2″ × 3″ blocks

Improves accuracy, repeatability, and setup efficiency

Suitable for CNC and manual milling operations

Reduces measurement errors and layout time

Ideal for production, prototyping, or machining education