Ultra Precision Ground 1-2-3 Block Set, Matched Pair, 1x2x3 Inch Tool Steel With 23 Holes, Flatness Plus Minus 0.0003 Inch, Parallelism 0.0002 Inch, Ideal For Precision Machining, Inspection And Positioning, Pro Grade
✔️ Matched 1x2x3 blocks, 2-unit pack, ±0.0003 in tolerance, 23 holes
This is a precision-ground 1-2-3 block pair crafted from hardened tool steel. They provide reliable reference surfaces for setup, inspection, and positioning in machining environments such as machine shops and inspection labs.
✅ 1x2x3 inch blocks (25.4 x 50.8 x 76.2 mm) in a matched pair
✅ Dim tolerance ±0.0003 in/in, verticality ±0.0003 in/in, parallelism 0.0002 in
✅ 23-hole cross-drilled design combines strength and lightweight handling
✅ Hardened tool steel; all six faces precision-ground for flatness and wear resistance
✅ Ready-to-use out of the box; ideal for machining, inspection, and positioning
💡 What is a precision reference block used for in manufacturing? These handy blocks provide a stable, flat reference plane for setup, inspection, and positioning.
- They offer a handy reference plane for aligning workpieces and checking squareness and parallelism.
- Used in milling, inspection, and fixture setups for consistent results.
- Made from hardened tool steel to resist wear and maintain accuracy over time.
- Available in inch and mm sizes for cross-compatibility and repeatable results.