ISO 1986-1:2014

Overview

ISO 1986-1:2014 specifies test conditions and acceptance criteria for the accuracy verification of surface grinding machines with a horizontal grinding wheel spindle and a reciprocating table up to 1 600 mm table length. Focused on both geometric and machining tests, the standard defines terminology, allowable tolerances and recommended measuring methods for general‑purpose and normal‑accuracy surface grinders. It is limited to accuracy verification and does not cover operational checks (vibrations, abnormal noise) or machine characteristics (speeds, feeds).

Key technical topics and requirements

• Scope and applicability
  • Applies only to reciprocating‑table surface grinders with horizontal wheel spindle and table length ≤ 1 600 mm.
  • Not applicable to machines with fixed/rotating tables or wheelhead longitudinal traverse.
• Tests covered
  • Geometric tests: straightness and squareness of axes, table flatness and parallelism, spindle runout and axial error motion.
  • Machining tests: finishing‑condition machining tests to verify accuracy of produced surfaces (not for roughing).
• Tolerances and measurement units
  • Linear dimensions and deviations given in millimetres; angular deviations expressed as ratios (e.g., 0,010/1000) or microradians/arcseconds.
  • Example tolerances (as specified): straightness of the table longitudinal movement - 0.010 mm for measuring length up to 1 000 mm (0.016 mm for longer lengths); spindle nose runout - 0.005 mm.
  • Minimum geometric tolerance: 0.001 mm when scaling between measuring lengths.
• Measuring instruments and references
  • Typical instruments: straightedge, dial gauge, alignment telescope, laser interferometer, taut wire, precision level, gauge blocks.
  • Normative linkage to ISO 230‑1 for general machine tool test methods and ISO 841 for axis designation and terminology.

Practical applications - who uses ISO 1986-1:2014

• Machine tool manufacturers for factory acceptance testing and quality control.
• Purchasers and end‑users to define acceptance criteria in procurement and commissioning.
• Calibration and testing laboratories performing accuracy verification and certification.
• Maintenance and metrology teams for periodic verification after repair, retrofit or reconditioning.
• Use cases include acceptance testing, commissioning, periodic accuracy audits, and comparison of machine variants against standard tolerances.

Related standards

• ISO 230‑1:2012 - Test code for machine tools (geometric accuracy procedures and practice).
• ISO 841 - Designation of axes and terminology for machine tools.

Keywords: ISO 1986-1:2014, surface grinding machines, horizontal grinding wheel spindle, reciprocating table, geometric tests, machining tests, tolerances, ISO 230-1, machine tool accuracy.