Overview
ISO 3002-4:1984 - Basic quantities in cutting and grinding (Part 4: Forces, energy, power) defines a consistent nomenclature and measurement concepts for forces, torques, energy and power in machining and grinding operations. The standard covers how to describe and resolve forces and torques exerted by a tool or by the cutting/grinding part on the workpiece, how to express cutting and feed energies, and how to compute instantaneous power for a specified operation and machine tool. It also provides multilingual terminology (English, French, Russian, plus equivalent German, Italian and Dutch terms).
Key topics
- Definitions of force and torque: total force and total torque produced by cutting parts or by the whole tool; cutting torque about the primary motion axis.
- Geometrical resolution of forces: terminology and symbols for resolving the total force into components relative to tool faces, working planes, machine axes, motion directions (cutting, feed), shear plane and normals.
- Force components: standard names for cutting force, feed force, back force (normal to working plane), thrust force, tool-face tangential and normal forces.
- Shear plane model: shear plane, shear-plane angle and related tangential/perpendicular shear forces for simplified orthogonal cutting analyses.
- Energy concepts: cutting energy (energy to cause primary motion), feed energy (energy for feed motion), and working energy (sum of cutting + feed energies) for a defined operation interval.
- Power definitions: instantaneous power as the scalar product of force and velocity vectors at the cutting-edge principal point; component powers (cutting power, feed power, working power).
- Units and derived quantities: SI guidance - forces (N), torques (N·m), energy (J), power (W); cutting force per unit area, energy per unit volume and cutting power per unit material removal rate are defined with SI examples.
Applications
- Process engineers and machinists use ISO 3002-4 to:
- Standardize measurement and reporting of cutting forces and torques for tool selection and process optimization.
- Calculate cutting and feed power requirements for machine tool sizing and energy-consumption estimates.
- Analyze chip formation and shear-plane mechanics in research and tooling development.
- Interpret force sensor data, design experiments, and compare results across laboratories and suppliers.
- Tool designers, machine-tool manufacturers and test laboratories benefit from the consistent vocabulary and component definitions when specifying instrumentation, control limits and safety margins.
Who should use this standard
- Machining and grinding process engineers
- Tooling and insert manufacturers
- Machine tool designers and integrators
- Tribology and machining researchers
- Test laboratories and standards bodies
Related standards
- ISO 3002-1 (general concepts), ISO 3002-2 (tool geometry conversion formulae), ISO 3002-3 (geometric/kinematic quantities), ISO 3002-5 (grinding terminology), and ISO 841 (machine axis and motion nomenclature). These linked parts should be read together for complete standardization of cutting and grinding quantities.
Keywords: ISO 3002-4:1984, cutting forces, grinding forces, cutting energy, cutting power, torque, machining standards, force components, shear plane, tool forces.
