ISO 3070-3:2007

Overview

ISO 3070-3:2007 - Machine tools - Test conditions for testing the accuracy of boring and milling machines with horizontal spindle - Part 3: Machines with movable column and movable table - defines standardized test conditions, test types and applicable tolerances for verifying the geometric accuracy, machining performance and NC positioning repeatability of general-purpose horizontal boring and milling machines with a movable column and movable table.

The standard is intended for accuracy verification only and refers to ISO 230 series (especially ISO 230-1, ISO 230-2, ISO 230-7) and ISO 1101 for geometrical product specifications.

Key topics and technical requirements

• Scope of machines covered: horizontal-spindle boring and milling machines with column/column saddle movement on the bed (X), vertical spindle-head movement (Y), boring-spindle or ram axial movement (Z), optional facing-slide feed (U), and in some designs an intermediate saddle movement (W).
• Test categories specified:
  • Geometric tests (straightness, angular deviations, squareness of axes, table geometry, spindle/ram/run-out)
  • Machining tests (finish/accuracy under cutting conditions)
  • Spindle and facing-head tests
  • NC positioning: accuracy and repeatability checks for numerically controlled axes
  • Geometric accuracy of rotational axes
• Reference and measurement rules:
  • Tests reference procedures and measuring accuracy from ISO 230 series
  • Linear units in millimetres; angular deviations expressed as ratios (e.g., x/1000), microradians or arcseconds where appropriate
• Tolerances: the standard specifies applicable tolerances corresponding to each test (used for acceptance and comparison). ISO 3070‑3 deals with verification of accuracy only - it excludes operational checks like vibration, speeds/feeds or dynamic characteristics.

Practical applications

• Acceptance testing of newly manufactured or installed boring/milling machines
• Quality control and benchmarking for machine tool manufacturers and OEMs
• Inspection and maintenance programs to verify geometric accuracy after repair or relocation
• Factory acceptance tests (FAT) and procurement specifications to ensure machines meet contracted accuracy classes
• Calibration laboratories and third‑party auditors performing standardized machine-tool verification

Who uses this standard

• Machine tool manufacturers and designers
• Quality / metrology engineers and test laboratories
• Production engineers in heavy machining, aerospace, energy and automotive sectors
• Purchasers specifying acceptance criteria for boring and milling machines

Related standards

• ISO 230-1: Geometric accuracy (no-load, finishing conditions)
• ISO 230-2: Accuracy & repeatability of NC axes
• ISO 230-7: Geometric accuracy of axes of rotation
• ISO 1101: Geometrical tolerancing (GPS)
• ISO 3070 series (Parts 1–3) covering other machine configurations

Keywords: ISO 3070-3:2007, boring and milling machines, horizontal spindle, movable column, movable table, geometric tests, machining tests, NC positioning, machine tool accuracy, tolerances.