EN 13159:2018 Electric Hoist Gearbox Requirements
EN 13159:2018 — Technical Requirements for Electric Hoist Gearboxes is a key component of the European crane design standard series, developed and published by the European Committee for Standardization (CEN). The standard specifically addresses the design, manufacturing, and testing of gearboxes used in electric hoists, covering gear strength calculation, bearing life verification, housing sealing, and lubrication system requirements. It applies to three-stage and four-stage gear reducers for electric hoists with rated lifting capacities from 0.25 t to 100 t.
Implementation of this standard is essential for enhancing the international competitiveness of Chinese lifting equipment and is a mandatory technical requirement for exporting to the European market. Kelude's technical team has conducted in-depth research on this standard framework and fully integrates its requirements into product design to ensure intrinsic safety.
Standard Scope and Application
EN 13159:2018 — Technical Requirements for Electric Hoist Gearboxes — defines the technical specifications and safety indicators for electric hoist deceleration systems, applicable to all types of lifting appliances with a rated lifting capacity of 0.5 t or above. The standard covers not only the design and manufacturing of new equipment but also provides clear technical guidance for the inspection, maintenance, and modification of in-service machinery. As an integral part of the EN standard system, it aligns with other parts of the EN 13001 Crane Safety Standard to form a complete framework for crane safety design. The explicit technical parameters and safety factor requirements give design personnel a clear design basis, while also providing quantifiable acceptance criteria for type tests and factory inspections conducted by third-party inspection bodies.
Core Technical Parameter Framework
Under EN 13159:2018, the design and manufacturing of electric hoist gearboxes must satisfy a comprehensive set of technical parameter requirements. These parameters are established on the basis of extensive test data and safety engineering principles, covering the entire process from material selection to structural design. The safety factor ranges specified in the standard account for fatigue life and limit load conditions under severe operating environments. In practical engineering applications, design personnel must select appropriate parameter combinations based on the equipment's work duty, load spectrum, and operating conditions. The parameter cards below highlight the most critical technical indicators defined in the standard:
Key Parameter Comparison and Analysis
To help design and inspection personnel better understand the technical requirements of EN 13159:2018, the comparison table below systematically contrasts the core parameters specified in the standard with general engineering practice. All values listed are taken from either mandatory or recommended clauses of the standard and should be strictly implemented during design and selection as well as factory acceptance testing. For items marked "negotiable," manufacturers and users may agree on alternative values in the contract, provided they do not fall below the minimum safety requirements set by the standard.
| Technical Parameters | Standard Requirement | Recommended Value/Description |
|---|---|---|
| Tooth Flankcontact safety factor SH | ≥1.25 | According to ISO Class 6 (cleanroom)336 Gear load capacity calculation standard Calculation, Considerationdynamic load factor Kvand Service Coefficient KA |
| Tooth Rootbending safety factor SF | ≥1.50 | Unidirectional Operation: Bending Fatigue Limitσ FE×YN/SFmin |
| Bearing Rated Life L10h | ≥5000Hours(rated load) | According to ISO 281 Rolling bearings — Dynamic load ratings and rating life Calculation, reliability90% |
| Gearbox Housing Protection Rating (IP) | IP55(Dustproof+Water Jet Proof) | Output Shaft Oil seal Double Sealing, Static Seal Top Coat Sealant |
| transmission efficiency Requirement | ≥92%(Three-Stage Gear) | Four-Stage Geartransmission efficiency≥88%, Including Churning Loss |
| No-loadnoise limit | ≤80dB(A)(Distance1m) | Measuring Point5Points, Average of All Points |
Inspection Requirements & Intervals
EN 13159:2018 sets out clear requirements for Factory Acceptance Tests, Type Tests, and periodic inspections of electric hoist gearboxes. Factory Acceptance Tests must be carried out on every unit by the quality inspection department at the manufacturer's facility, and each approved unit must be accompanied by a detailed inspection report and a certificate of conformity. Type Tests are required when a new product enters production, when manufacturing is transferred to a different facility, or when significant design changes are introduced. For equipment already in service, the periodic inspection interval is determined by the work duty classification and operating environment, with a maximum interval of 12 months. The table below summarizes the specific inspection and maintenance requirements:
| Inspection/maintenance item | inspection method/Standard | Period/Acceptance Criteria |
|---|---|---|
| Lubricating Oil Inspection | Oil Level, Oil Condition, Oil Temperature | Weekly Oil Level Check, Per500hReplacement Lubricating Oil |
| Gear Mesh Inspection | Contact pattern, tooth flank wear, Pitting | Semi-Annually, Contact pattern Length≥60%Face Width |
| Bearing Condition Monitoring | Vibration acceleration, Temperature, Noise | Quarterly Vibration Measurement, Addspeed≥10m/s²Replace When |
| Sealing Condition Check | Output Shaft Leakage, Housing Joint Face Leakage | Monthly, Replace Immediately Upon Leakage Oil seal |
Safe Operation and Management Requirements
Under EN 13159:2018, safe operation and routine management are just as critical as design and manufacturing. The standard places strong emphasis on operator qualification and training, requiring that all operators complete specialized training and obtain the necessary certifications before being allowed to work. User units must establish a comprehensive equipment file management system that documents the full lifecycle of the equipment, including installation, use, maintenance and inspection. Any safety hazards identified must be addressed through the rectification procedure specified in the standard to ensure the equipment remains safe and controllable at all times. In addition, the standard imposes restrictions on equipment use under extreme weather conditions — for example, lifting operations are prohibited when wind speeds exceed the specified limit.
EN 13159:2018 FAQ — Gearbox Requirements Explained
Q: What safety factor requirements does EN 13159:2018 impose on reducer gears?
A: The standard requires a contact safety factor SH of no less than 1.25 for gear tooth flanks and a bending safety factor SF of no less than 1.50 for tooth roots. Both safety factors must be calculated in accordance with ISO 6336 Gear load capacity calculation standard, taking into account the dynamic load factor Kv, application factor KA, longitudinal load distribution factor KHβ, and transverse load distribution factor KHα. Gear materials should be carburized and quenched alloy steel (e.g., 20CrMnTi or 17CrNiMo6), with an effective case depth determined by module, typically in the range of 0.15–1.0 mm. Tooth surface hardness must reach HRC58–63, with core hardness of HRC35–45. Kelude Heavy Industry electric hoist gearbox gears are manufactured using high-performance alloy steel with carburizing and quenching, providing ample margin in both contact and bending safety factors.
Q: What are the bearing selection and service life requirements for gearboxes?
A: The standard requires that gearbox bearings achieve a rated life L10h (90% reliability under rated load) of no less than 5,000 hours. Bearing selection must follow ISO 281 Rolling bearings — Dynamic load ratings and rating life for life calculation. The high-speed shaft bearing must accommodate combined radial and axial loads and is therefore typically a Tapered Roller Bearing or Angular Contact Ball Bearing. Intermediate and output shaft bearings are selected as Deep Groove Ball Bearings or Cylindrical Roller Bearings depending on the load profile. Bearings should use C3 internal clearance to accommodate thermal expansion during gearbox operation. The limiting speed of the high-speed shaft bearing must be at least 1.2 times the maximum input speed. The company uses SKF or FAG bearings in its gearbox designs and accounts for grease viscosity changes during cold starts at −20°C.
Q: What technical requirements apply to the gearbox lubrication system?
A: The standard specifies requirements for lubrication method, gear oil selection, and oil change intervals. Splash lubrication is typically used, with gear immersion depth controlled at 2–3 times the module — deeper immersion increases churning losses and oil temperature. Synthetic gear oil (e.g., ISO VG 220 or 320) is recommended, with an operating temperature range of −20°C to +80°C. Oil level and condition should be checked weekly, and the oil should be replaced every 500 operating hours. Viscosity grade is selected based on ambient temperature: VG320 for normal conditions and VG220 for low-temperature environments. The gearbox housing must include an oil level sight glass, breather, and drain plug, with the breather's dustproof rating no lower than IP55.
Q: What items are included in routine gearbox maintenance inspection?
A: Routine maintenance inspection includes: weekly checks of oil level and condition, with early oil changes if emulsification or excessive contamination is detected; monthly checks of the sealing integrity at the output shaft and housing mating surfaces, with immediate oil seal replacement if leakage is found; quarterly vibration monitoring and temperature measurement, with bearing replacement required when acceleration values exceed 10 m/s²; and semi-annual inspection of gear tooth contact pattern, which must show a contact pattern length of no less than 60% of tooth width and height of no less than 45% of tooth depth. No-load noise during gearbox operation must not exceed 80 dB(A), measured at 5 points at a distance of 1 m from the housing and averaged. The company provides lifecycle maintenance guidance for its gearboxes.
Kelude — a professional crane design and manufacturing company whose products fully comply with the EN 13159:2018 standard system, offering full lifecycle services from solution design to after-sales maintenance. To learn more about how this standard is applied in our products, contact our technical team for detailed technical documentation.
