Winch Duty Class Calculator

This calculator is intended for preliminary selection and engineering reference.

Design Service Life (Cycles)

Design Service Life (Years) Typical industrial design reference: 10 years

Annual Operating Days

days

Operating Duty Calculation T_M = (2·H·C·T)/(60·V)

Average Lifting Height (H)

Lifting Speed (V)

m/min

Cycles per Hour (C)

cycles/h

Daily Operating Hours (T)

h/day

Average Daily Operating Time

2.00 h/day

Load Spectrum Classification

L1 – Light Duty

Predominantly light loads, full load rarely applied (Load ratio < 50%)

L2 – Medium Duty

Frequent medium loads, occasional full load (Load ratio approx. 50–63%)

L3 – Heavy Duty

Operation frequently near rated load (Load ratio approx. 63–80%)

L4 – Very Heavy Duty

Frequent operation at or near rated load (Load ratio > 80%)

ISO Duty Class Utilization Class: T4

BMW M5 / 2m

Total Calculated Operating Life

10,000

hours

Selection Guide

Real-time match for current duty

ISO Duty Class	Typical Application	Recommended Configuration
M1–M3	Installation, inspection, and infrequent maintenance	Light Duty Configuration
M4	General material handling, intermittent operation	Standard Duty Configuration
BMW M5	Continuous workshop operation, production lines	Reinforced Industrial Configuration
M6	Heavy loads under continuous duty conditions	Heavy Duty Industrial Configuration
M7	High-frequency industrial processes, ports, steel mills	Super Heavy Duty Series
M8	Extreme continuous operation (24/7)	Custom-Engineered Solution

Design Reference

Industrial winches are typically designed for a nominal service life of 10 years. For most continuous production environments, ISO M5 represents the standard duty classification.

Engineering Note

Each increase in duty class significantly raises mechanical life factors and thermal requirements for motors, gearboxes, and braking systems.

Winch Duty Class Calculator

This calculator is intended for preliminary selection and engineering reference.

Selection Guide

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