GrabCAD 模型信息
Precision Ground Block 1×2×3 inch · 模型 39476
This 3D model represents a Precision Ground Tooling Block, also known as a 1-2-3 Block in its imperial version (1 × 2 × 3 inch). It serves as a fundamental tool in machine shops, inspection setups, and mechanical fixturing — ideal for operations that require high perpendicularity, parallelism, and repeatable accuracy in workpiece alignment and instrument calibration. TECHNICAL SPECIFICATIONS - Nominal Dimensions: 1 × 2 × 3 inch - Hole Pattern (Standard Layout): 23 total holes (18 through holes + 5 threaded 3/8-16 UNC) - Threaded Holes: 3/8-16 UNC, Class 2B - Through Holes: Ø ≈ 0.386 in (9.8 mm) clearance for 3/8 bolts - Manufacturing: All six faces are precision ground for dimensional accuracy and flatness - Geometric Tolerance: Parallelism and perpendicularity ≤ 0.0002 inch (≈ 0.005 mm) - Material: Hardened tool steel (approx. hardness HRC 58–62) APPLICATIONS - Precision setup on CNC milling machines and surface plates - Creation of alignment references and workholding jigs - Fixture and inspection design - Educational and training use in metrology and machining FILE INFORMATION - Format: STEP (.stp) / IGES (.igs) / Fusion 360 (.f3d) - Units: Inches (in) NOTE ON STANDARDS Although similar in concept to DIN 861 and JIS B 7516 gauge blocks, this component is classified as a tooling aid, not a certified metrological reference. Its ≤ 0.0002 inch flatness and squareness values reflect manufacturer-grade tolerances typical of high-accuracy precision blocks.
- 格式
- Fusion 360、STEP / IGES、Rendering
- 分类
- Components、Industrial design、Tools
- 标签
- cnc setup x metrology x din 861 x gauge block x precision bl
- 数据更新
- 2026-10-08T18:30:55Z
