In precision processing and automation equipment (such as industrial robots and logistics sorting systems), the accuracy of transmission components directly affects the stability, service life and overall performance of the equipment. If the precision of key components such as gears, lead screws, guide rails or couplings is insufficient, it may lead to equipment vibration, accelerated wear and even affect the production yield.
So, how to select high-precision transmission components to ensure the best performance of automated equipment? This article will analyze key factors such as materials, processing techniques, tolerance control, lubrication and maintenance, hoping to be helpful to you.
Core performance indicators of transmission components
When choosing high-precision transmission components in the automation industry, the following parameters should be given particular attention.
| Index | Influence | Ideal range (for reference) |
| Grade of tolerance | Determine the fit accuracy | ±0.005mm (Precision grade) |
| Surface roughness (Ra) | Influence on friction and wear | ≤0.4μm (mirror level) |
| Hardness (HRC) | Hardness determines wear resistance | 58-62 HRC (Hardened steel) |
| Rigidity (stiffness) | Non-deformability | High-rigidity materials (such as alloy steel) |
| Lubrication compatibility | Reduce frictional heat | Suitable for grease or solid lubrication |
Selection Guide for Key Transmission Components
Gears & racks
Material selection:
Hardened alloy steel (such as 20CrMnTi) : High wear resistance, suitable for heavy-duty gearboxes.
Stainless steel (such as 17-4PH) : Corrosion-resistant, suitable for food/medical equipment.
Processing technology:
Gear grinding processing (with an accuracy of DIN grade 3) is superior to gear hobbing and can reduce meshing noise.
Surface nitriding treatment can increase fatigue life by more than 30%.
Ball screw & linear guide
Preloading grade:
Medium preload (C3 grade) : Balance accuracy and rigidity, suitable for CNC machine tools.
High preload (C5 grade) : Used in precision positioning systems with high rigidity requirements.
Dust-proof design
Choose the model with a sealing scraper or a stainless steel protective cover to prevent dust from entering.
shaft coupling
Zero backlash couplings (such as diaphragm type) are more suitable for high-precision servo systems than traditional couplings.
The allowable eccentric compensation amount needs to match the installation error of the equipment (usually ≤0.02mm).
How to verify the processing capabilities of suppliers?
When choosing a supplier of high-precision transmission components, the following aspects need to be examined:
✅ Equipment level: Does it have high-precision equipment such as 3-4-5 axis CNC, slow wire cutting, grinding machines, etc.?
✅ Test Report: Can coordinate measuring (CMM) data be provided?
Practical suggestions for extending the service life of transmission components
Lubrication optimization:
Use fully synthetic greases (such as Kluber Isoflex TOPAS) instead of mineral oil to reduce high-temperature volatilization.
Regular maintenance:
Check the preload status of the guide rail lead screw every 500 hours to avoid reverse clearance caused by wear.
Avoid overload:
When designing, a 20% safety margin should be reserved. For example, for a mechanical arm with a rated load of 10kg, the actual usage should not exceed 8kg.
If you need to customize high-precision gears, lead screws or guide rail components, please feel free to contact us - we specialize in ultra-high precision processing within ±0.005mm.
Let's Make Something Extraordinary Together
At Dahong Precision, we are more than just a CNC machining supplier, we are your partner in precision manufacturing. Whether you need simple parts or highly complex parts, our 3, 4 and 5 axis CNC machining services deliver the quality and reliability you deserve. Contact us today to discuss your project and find out how we can help you achieve your goals.
