Choosing the right hoist capacity is the single most important decision when setting up a lifting system. Go too small, and you risk equipment failure and operator safety. Go too big, and you pay for speed and precision you will never use — while making the hoist harder to control for everyday tasks.
This guide walks through a straightforward process to determine exactly what you need. No engineering degree required.
1. The One Number That Actually Matters: Working Load
The hoist industry rates everything by Safe Working Load (SWL) — the maximum mass the hoist is designed to lift under normal conditions. But your actual working load is rarely a single number. It changes with every job.
Start by listing the heaviest items you lift regularly:
| Typical Load | Approximate Weight | Example |
|---|---|---|
| Small machine part | 10–50 kg | CNC fixture, cutting tool |
| Medium assembly | 50–150 kg | Gearbox housing, motor |
| Sheet metal stack | 100–400 kg | 1.5m×3m steel sheets |
| Large mold / die | 400–1000 kg | Injection mold, stamping die |
| Heavy machinery | 1000–2000 kg | Machine tool, large casting |
Rule of thumb: Your hoist capacity should be at least 125% of your heaviest regular load. If your heaviest part is 200 kg, look at 250 kg or 300 kg hoists. This margin accounts for dynamic forces during acceleration, uneven load distribution, and the weight of your lifting attachment.
2. Match the Hoist to Your Real Workload
Here is how Kinmotor's product line maps to common workshop scenarios:
| Kinmotor Series | Capacity Range | Best For |
|---|---|---|
| D3 / Q6 Servo | 125–250 kg | Small parts handling, assembly stations, light fixture changes |
| X3 Servo | 300–600 kg | Laser cutting sheet loading, CNC workpiece changes, general fabrication |
| D2 VFD | 125–2000 kg | Mold handling, heavy machining, warehousing, large assemblies |
For the majority of small to medium fabrication shops, the X3 servo hoist at 300 kg covers over 80% of daily lifts. The 600 kg variant handles the rest — large dies, heavy weldments, and full sheet stacks.
3. Duty Cycle: How Often Do You Lift?
Capacity is only half the equation. A hoist that lifts 300 kg once per hour lives a very different life from one lifting 300 kg every two minutes.
Hoists are rated by duty classification, from light intermittent use (M3) to heavy continuous operation (M6):
- Occasional use (a few lifts per day): M3 hoist is sufficient. The D2 series works well here.
- Regular production (20–50 lifts per shift): M4–M5 recommended. The X3 servo hoist is designed for this band.
- Continuous operation (hundreds of lifts per shift): M5–M6. The Q6 series handles high-cycle environments.
If you are loading sheets onto a laser cutter 30 times per shift, you are firmly in the "regular production" band. A servo hoist with M4+ rating will outlast a light-duty hoist by years and provide the speed you need.
Kinmotor X3 duty rating: M4 (1Am) as standard, suitable for 200+ cycles per 8-hour shift. The D2 VFD series covers M3–M5 depending on configuration.
4. Lifting Height and Workspace Constraints
Measure the vertical distance from your pickup point to the highest position you need to reach:
- Standard lifting height: 6–12 meters covers most single-story workshops
- Low ceiling shops: Look for compact hoist bodies and low-headroom trolley options
- Multi-level operations: May need custom lifting height — Kinmotor can configure up to 30m
The hoist itself is only one component. Factor in the crane system height: a folding jib crane adds flexibility in tight spaces, while an aluminum rail system can follow the ceiling contour.
5. Single Speed vs. Variable Speed
A basic single-speed hoist lifts at one fixed rate — usually 6–8 m/min. This works for raw lifting where you just need to move something from A to B.
A variable-speed hoist — like the X3 servo or D2 VFD — lets you:
- Move fast during the travel portion (up to 30 m/min for X3)
- Move slow during positioning (as low as 0.05 m/min for X3)
- Soft start and stop to avoid swinging the load
If you are positioning parts onto a machine bed — a CNC table, a laser cutting grid, an assembly fixture — the variable speed difference is not a luxury. It is what prevents damaged parts and damaged machines.
Quick Selection Table
| Your Scenario | Recommended Hoist | Capacity | Why |
|---|---|---|---|
| Laser cutting, standard sheets | X3 Servo | 300 kg | Right capacity, servo precision, fast cycle |
| Laser cutting, large format | X3 Servo | 600 kg | Covers 2m×4m sheets up to 10mm |
| CNC machine loading | X3 Servo or D2 VFD | 125–300 kg | Variable speed for precise placement |
| Mold / die handling | D2 VFD | 500–2000 kg | Higher capacity, VFD control |
| Assembly line | D3 / Q6 Servo | 125–250 kg | Compact, fast, high cycle rating |
| General workshop | D2 VFD | 250–500 kg | Versatile, covers most loads |
Not sure which configuration fits your workshop?
Tell us what you are lifting — weight, dimensions, frequency, and workspace layout — and we will recommend the right hoist and crane combination. No obligation, no sales pitch.
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