| Product requirements | Define the intended use, such as lawn edging, trimming around obstacles, or maintaining small gardens, before selecting the tool layout and power system. | Expected workload, user comfort, cutting conditions, target price, and applicable safety requirements. | A product specification covering performance targets, operating conditions, and required safety features. |
| Battery and power system | Match a rechargeable lithium-ion battery pack with the motor, controller, and charger. Cordless tools commonly use battery platforms such as 18 V or 36 V nominal systems. | Runtime depends on battery capacity, cutting load, motor efficiency, and operating style. Battery packs need appropriate protection against overcurrent, overheating, and deep discharge. | Checks for charging behavior, electrical protection, operating temperature, and runtime under defined test conditions. |
| Motor and speed control | Select a brushed or brushless electric motor and design the control system to deliver suitable cutting speed and response. | Power demand, heat dissipation, noise, tool weight, and the ability to handle changes in grass density. | Motor operation and temperature are assessed under representative cutting loads. |
| Cutting head and guard | Design the cutting head for compatible non-metallic line or another specified cutting system, with a guard positioned to help contain debris. | Line compatibility, feed mechanism, cutting width, wear, debris direction, and clearance from the user. | Checks for line feeding, cutting performance, guard fit, and durability during repeated use. |
| Shaft and handle layout | Choose a straight or curved shaft and position the handle and controls to support a stable operating posture. | Reach, balance, vibration, grip comfort, adjustment range, and access to the trigger and safety controls. | Fit and handling evaluations, including checks of balance and control accessibility. |
| Materials and component selection | Use suitable engineering plastics, metals, electrical components, and fasteners for the expected outdoor environment and mechanical loads. | Impact resistance, moisture and dust exposure, corrosion, weight, service life, and ease of assembly. | Incoming component checks and inspections of material, dimensions, and assembly fit. |
| Prototype development | Build sample units to evaluate the integrated battery, motor, cutting head, guard, shaft, and controls before committing to production tooling. | Prototype findings may lead to changes in ergonomics, cooling, strength, assembly, or operating behavior. | Documented design revisions and samples that meet defined engineering targets. |
| Manufacturing and assembly | Produce or source components, assemble electrical and mechanical subassemblies, and follow controlled work instructions. | Part consistency, correct wiring and fastening, traceability, and repeatable assembly processes. | In-process inspections and checks of completed assemblies. |
| Product testing | Evaluate finished units using defined functional, electrical, mechanical, and safety checks appropriate to the product and target market. | Test methods and acceptance limits should be established for the specific model; requirements vary by product design and destination market. | Recorded test results, inspection records, and corrective actions for nonconforming units. |
| Packaging and documentation | Pack the tool, battery, charger, accessories, and user information according to the selected product configuration. | Clear operating and charging instructions, safe storage guidance, transport protection, and market-specific documentation. | Packaging checks and confirmation that the correct accessories and documents are included. |
| Note: The table describes common cordless grass-cutter design and manufacturing practices. Battery voltage, runtime, cutting width, materials, and testing requirements vary by model and are not universal specifications. |