Inspection methods for electric tools Inspection and factory verification services

October 15, 2025

Electric tools, as important power equipment, their quality and safety directly affect the personal safety of users. During the inspection, factory verification, and product inspection and certification processes of electric tools, a strict quality control system must be established. This article will systematically elaborate on the inspection standards, inspection methods, and safety certification requirements of electric tools, providing professional technical guidance for industry practitioners.
I. Inspection and Certification Standards System for Electric Tools
(1) Appearance Quality Inspection Certification
Qualification Document Certification
Manufacturer qualifications: Verify the production enterprise's qualification certificate
Product nameplate: Verify that the information on the nameplate is complete and standardized.
Qualified certification: Verify the product quality inspection certificate
Electrical Safety Certification
Grounding system: The protective grounding wire is correct and reliable.
Power supply line: The power cord and plug are in good condition without any damage.
Cable specification: Compliant with the standard for multi-strand copper core rubber sheathed cable
Structural Integrity Certification
Shell handle: No cracks or damages
Safety device: The mechanical protection is in good condition and functioning properly.
Rotating parts: Smooth and free from obstruction
(2) Insulation Performance Inspection Certification
Insulation Resistance Measurement Certification
Test tool: Use a standard megohmmeter
Measurement method: Conduct separate tests on the phase wire - ground wire and the neutral wire - ground wire.
Operation specification: Rotate the handle at a constant speed to read the stable value.
Electrical Leakage Protection Certification
Protection device: Leakage protection function is in good condition.
Action test: Switch operation is normal and smooth.
Power-on test: No abnormal noise during no-load operation
II. Inspection and Certification Process for Electric Tools
(1) Packaging Mark Inspection and Certification
Packaging Quality Certification
Quantity verification: Confirm that the product quantity is accurate
Label verification: Check the information on both the front and back labels.
Packaging materials: Inspect the size and material of the cartons
Identification Specification Certification
Inner packaging: Text, barcode, certification mark
Color matching: The pattern of the box body is consistent with the color of the tool.
The attachments are all complete: the manual and the accessories are all present.
(2) Performance Testing Certification
Operation Testing Certification
Sampling standard: Sampling according to the AQL standard
Continuous operation: 15-minute treadmill test
High-pressure test: High-pressure test for each tool
Electrical parameter certification
Basic parameters: Voltage, Current, Power, Speed
Grounding resistance: Each piece of Class I tool is tested individually.
Safety standard: Compliant with national electrical safety regulations
(3) Structural Safety Inspection Certification
Internal Structure Certification
Key component: Verify consistency by comparing with the CDF table
Process quality: Internal structure process inspection
Safety clearance: Measuring the leakage electric field distance
Mechanical component certification
Winding measurement: Record the rotor and stator dimensions
Capacitor inspection: Verify capacitor parameters
Connection strength: Test the tensile strength of the power cord
III. Safety Usage Certification Requirements
(1) Safety Performance Awareness Certification
Performance Parameter Certification
Operating parameters: Understand the rated speed, voltage and current.
Load limit: Do not use beyond the capacity.
Adaptation assessment: Operator-tool compatibility
Safety protection certification
Grounding protection: A reliable grounding system
Overheat protection: A complete overheat protection device
Insulation class: Meets the insulation class requirements
(2) Equipment Status Verification
Equipment Evaluation Certification
Degree of newness and obsolescence: Avoid using outdated equipment
Insulation performance: Rigorous insulation testing
Wear inspection: Evaluation of the condition of the bearing oil seal
Electrical system certification
Line specification: Professional power distribution equipment
Insulation is in good condition: The power cord shows no signs of aging or damage.
Special personnel responsibility: Special personnel management and maintenance system
IV. Operation and Maintenance Certification System
(1) Pre-operation Inspection Certification
Security Inspection Certification
Performance verification: The working parameters meet the requirements.
Safety first: Absolutely not to force its use
Load control: Strictly prohibit overloading operation.
(2) Operation Process Certification
Operation Specification Certification
Abnormal monitoring: Closely monitor the operating status
Regional management: Restrict access for unauthorized personnel
Protective equipment: Use protective gear properly
Safety measure certification
Personnel allocation: At least two people working together in coordination.
Automatic function:Use the automatic adaptation function
Emergency Preparedness: Comprehensive Emergency Response Plan
(3) Maintenance and Inspection Certification
Daily Maintenance Certification
Lubrication maintenance: Regular lubrication of moving parts
Hydraulic inspection: Monitoring of oil level and oil seal condition
Electrical maintenance: Inspection of power system integrity
Regular inspection and certification
Current detection: Normal operating current range
Voltage monitoring: Voltage parameters meet the standards
Professional qualification: Certified personnel conducting professional inspections
V. Quality Control Certification System
(1) Inspection Record Certification
Test Data Certification
Complete record: Detailed test data
Problem tracking: Complete record of quality issues
Signature confirmation: The factory representative signs to approve.
Report Management Certification
Standard inspection report format
The conclusion is clear: eligibility is clearly determined.
Archival preservation: Complete inspection records
(2) Continuous improvement certification
Supplier management certification
Qualification review: Rigorous supplier assessment
Quality assessment: Regular quality performance evaluation
Problem improvement: Effective improvement mechanism
Traceability system certification
Batch management: Comprehensive batch traceability
Problem Tracking: Effective Tracking of Quality Issues
Improvement verification: Verification of the effectiveness of improvement measures
VI. Certification Conclusion and Handling
(1) Criteria for Qualified Certification
Full-item Qualified Certification
Appearance quality: Meets the inspection standards
Performance parameters: Meet the specified requirements
Safety indicator: Passed safety test
Complete document certification
Qualification documents: Complete and valid
Inspection record: Complete and accurate
Certification mark: Clear and standardized
(2) Non-conformity Handling Procedure
Handling of Severe Defects
Immediate rejection: Safety hazards exist
Claim procedure: Initiate the claim process
Reform requirements: Must complete the rectification within the specified time and undergo re-inspection.
General issue handling
Deadline for rectification: General quality issues
Re-inspection: Re-inspection after rectification
Discount handling: Discount accepted after negotiation
By establishing a complete inspection and certification system for electric tools and strictly implementing quality control throughout the production-to-use process, it is possible to effectively ensure the quality and safety of electric tools, provide users with safe and reliable tool products, and promote the standardized development of the electric tool industry.