Casters can be seen everywhere in our lives, but there are many types of casters. The purpose of each caster is completely different, and the value it carries is also different. Now let's discuss with you what issues should be paid attention to before heavy-duty casters leave the factory?
Critical Quality Control Measures for Heavy-Duty Casters Before Factory Release
While casters serve diverse purposes across various applications, heavy-duty casters require particularly stringent quality controls. Let's examine the essential pre-shipment tests that ensure their reliability and performance.
1. Impact Resistance Test
Test Procedure:
Mount caster vertically on test platform
Drop 5kg (±2%) weight from 200mm height (±3mm)
Impact wheel edge (both wheels simultaneously for dual-wheel units)
Acceptance Criteria:
1) No component separation during test
2) Maintained rolling, swiveling, and braking functions post-test
3) Structural integrity preserved
2. Electrical Resistance Verification
Test Setup:
Place caster on grounded metal plate
Apply 5-10% of nominal load
Use 500V insulation resistance tester (≤3W power loss)
Performance Standards:
1) Conductive casters: ≤10⁴ ohms
2) Antistatic casters: 10⁵-10⁷ ohms
3) Measurement tolerance: ±10%
3. Static Load Endurance Test
Methodology:
Secure caster to smooth steel platform
Apply 800N force at center of gravity for 24 hours
Remove load for 24-hour recovery period
Validation Requirements:
1) Maximum 3% wheel diameter deformation
2) Fully functional rolling/swiveling mechanisms
3) Intact braking system
4. Dynamic Wear Simulation
Test Configurations:
A. Obstacle Course (metal ridges: 50mm wide × 2-3mm high)
H-type: 5,000 cycles
W-type: 30,000 cycles
B. Smooth Surface Testing:
H-type: 70,000 cycles
W-type: 20,000 cycles
Test Parameters:
300N load per caster
6-8 cycles/minute (1 cycle = 1m forward + 1m reverse)
Quality Assurance:
1) Zero component detachment
2) Full post-test functionality
3) Intact mobility features
5. Rolling Resistance Evaluation
Test Protocol:
Mount 3 casters on triangular base
Apply tiered loads (300/600/900N including base mass)
Traverse at 50mm/s (±5%) for 10 seconds
Measure traction force after 5 seconds
Passing Standard:
1) Traction force ≤15% of test load
2) Consistent motion without sticking
6. Swivel Resistance Assessment
Test Setup:
Install caster perpendicular to motion direction
Apply tiered loads (100/200/300N)
Initiate rotation within 2 seconds at 50mm/s
Performance Threshold:
1) Rotation initiation force ≤20% of test load
2) Smooth 90° pivoting action
These rigorous tests collectively ensure heavy-duty casters meet the highest standards of durability, safety, and performance before entering service. Each evaluation simulates real-world operating conditions to guarantee reliable performance in demanding industrial environments.
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