JB/T 9008.1-2014 Wire Rope Electric Hoist Types and Key Parameters
JB/T 9008.1-2014, "Wire Rope Electric Hoists — Part 1: Types and Basic Parameters," is the type standard for wire rope electric hoists. It specifies the types and basic parameters for CD1 and MD1 series wire rope electric hoists.
Hoist Types and Key Specifications
The standard defines the type parameters for CD1 hoists (single-speed hoisting at 8 m/min) and MD1 hoists (two-speed hoisting at 8/0.8 m/min). Rated lifting capacity ranges from 0.5 to 100 t, with standard lifting heights of 6–30 m (custom heights up to 60 m available on request). Mounting configurations include fixed (Type F) and trolley-mounted (Type D) versions. Operation modes cover pendant control and remote control operation. The standard also specifies overall and installation dimensions for each model, providing a unified technical basis for hoist selection and system integration.
The standard series follows a clear capacity-to-speed relationship — the higher the rated load, the slower the hoisting speed: 0.5–5 t at approximately 8 m/min, 10 t at about 7 m/min, 16 t at about 4.5 m/min, 20 t at about 3.5 m/min, and 32 t at about 3 m/min. Standard lifting heights are 6 m, 9 m, 12 m, 18 m, 24 m, and 30 m. The work duty classification ranges from M3 to M6, determined by combining service frequency and load spectrum. Applications involving frequent use should specify M5 to M6 duty.
The standard provides essential guidance for hoist selection. The work duty classification is determined by the utilization class (T0–T9) combined with the load spectrum (L1–L4), with typical classifications ranging from M3 to M6. Class M3 suits light-load, infrequent applications such as maintenance work, with approximately 6.3 × 10³ working cycles per year. Classes M4 to M5 cover general workshop lifting operations, with annual cycles of roughly 2 × 10⁴ to 6.3 × 10⁴. Class M6 is intended for continuous, high-frequency lifting in demanding environments such as logistics warehouses and production line integration, with approximately 2 × 10⁵ cycles per year. Correct selection of the work duty classification is critical to both the service life and operational safety of the hoist.
The standard also specifies the brake adjustment procedure for the conical rotor motor. Brake clearance is set by adjusting the bolts on the rear end cover, with a feeler gauge used to verify the gap falls within 0.3–0.6 mm. After adjustment, brake tests must be performed under both no-load and rated-load conditions — allowable load drop is ≤5 mm at no-load and ≤100 mm at rated load. The brake ring wear amount should be inspected weekly. Common faults associated with conical rotor motors include incomplete brake release (causing motor overheating), insufficient braking force (due to brake ring wear), and abnormal noise (typically from bearing damage). Each fault should be diagnosed and addressed systematically based on the observed symptoms.
Main Technical Parameters
The standard requires hoist motors to be conical rotor motors with Class F insulation and IP54 protection, featuring an integrated motor-brake design. Brake clearance is set at 0.3–0.6 mm — too small a gap prevents full brake release and leads to motor overheating and burnout, while too large a gap results in excessive braking stroke. The electrical control cabinet must provide protection rated at IP44 or higher, with control voltages at safety extra-low voltage of 36 V or 48 V. Power supply is delivered via enclosed conductor rail systems in C-type or H-type configurations. The wire rope must be galvanized, non-spinning, and of a cross-lay construction.
Full range
Custom available
Two-speed 8/0.8
Integrated brake
IP54 protection
Application-based
| Model | Lifting Capacity(t) | lifting height(m) | speed(m/min) | Power(k W) |
|---|---|---|---|---|
| CD1-05 | 0.5 | 6 | 8 | 0.8 |
| CD1-10 | 1 | 6 | 8 | 1.5 |
| CD1-20 | 2 | 9 | 8 | 3.0 |
| CD1-50 | 5 | 12 | 8 | 7.5 |
| CD1-100 | 10 | 12 | 7 | 13.0 |
Selection & Application Guide
Standard tests include the No-Load Test (minimum 5 full cycles), Rated Load Test at 100% SWL (3 hoisting/lowering cycles with load drop ≤100mm), a 1.25× static load test held for 10 minutes, and an insulation test (≥1MΩ). When selecting a hoist, match the model to the maximum load weight and required lifting height. Pay close attention to the interrelationship between lifting capacity, lifting height, and work duty classification. Kelude offers a full range of electric hoists to meet diverse application needs.
| inspection items | technical requirements | method | cycle |
|---|---|---|---|
| No-Load Test | full travel≥5times | visual inspection | factory |
| rated load | hoisting and lowering3times | load drop measurement | factory |
| static load | 1.25multiples×10min | visual inspection | annual |
| insulation | ≥1MΩ | Megohmmeter (Insulation Tester) | semi-annual |
The standard also specifies the brake adjustment procedure for the conical rotor motor on electric hoists — the brake clearance is set by adjusting the bolts on the rear end cover. After adjustment, use a feeler gauge to verify the clearance falls within 0.3–0.6 mm. Then perform brake tests under both no-load and rated load conditions: the no-load drop must not exceed 5 mm, and the rated-load drop must stay within 100 mm. If the clearance is too small, the brake may not fully disengage, causing the motor to overheat and burn out; if too large, the braking stroke will exceed the allowable limit.
Frequently Asked Questions
Q: What are the standard specifications for wire rope electric hoists?
A: Standard series hoists offer lifting capacities from 0.5 to 100 t with lifting heights of 6–30 m. The CD1 model provides single-speed hoisting at 8 m/min, while the MD1 model offers two-speed operation at 8/0.8 m/min. Mounting options include fixed and trolley types, and operation can be controlled via pendant or remote. Selection should be based on the weight of the load, required lifting height, and duty frequency.
Q: How does lifting speed relate to hoist capacity?
A: Lifting speeds vary by capacity: 8 m/min for 0.5–5 t hoists, 7 m/min for 10 t, 4.5 m/min for 16 t, 3.5 m/min for 20 t, and 3 m/min for 32 t. The speed reduction at higher capacities is a safety measure that also protects the gearbox's load-bearing capacity. Two-speed hoists allow precise low-speed positioning during delicate lifting operations.
Q: How is the work duty classification of an electric hoist determined?
A: The work duty is determined by combining the utilization class (T0–T9) with the load spectrum (L1–L4). Typical electric hoists fall within M3 to M6. Grade M3 is suitable for light, infrequent use such as maintenance work; M4 to M5 cover general workshop hoisting; and M6 is intended for continuous, high-frequency operations in logistics, warehousing, and production line applications.
Q: What are the maintenance requirements for electric hoists?
A: Inspect the brake clearance and brake ring wear every 100 hours of operation. Check the wire rope for broken wires and re-lubricate every 500 hours. Replace the gearbox lubricating oil every 1,000 hours. Inspect the hook for wear and deformation every 2,000 hours. Conduct a full safety inspection annually. For initial commissioning, change the oil after the first 100 hours to remove metal particles from the running-in period.
