Blog › Motor Winding  |  By Parth Enterprises, Faridabad

How Many Metres of Thread Does One Motor Winding Need?

One of the most practical questions in motor rewinding is how much thread you need to buy. Buy too little and you run out mid-winding. Buy too much and you tie up money in stock. The answer depends on the motor type, its size, and the winding pattern. Here are the practical estimates every rewinding workshop should know.

Why Thread Quantity Varies

Thread consumption in motor winding depends on:

• Motor size (physical dimensions of the stator and slots)
• Number of poles (2-pole, 4-pole, 6-pole motors use different amounts)
• Winding pattern (concentric vs lap winding)
• Number of slots in the stator
• How tight the thread is wound — tighter winding uses more thread

The figures below are practical estimates based on typical rewinding workshop experience. Your actual consumption may vary by 20–30% depending on the above factors.

Thread Requirement by Motor Type

Ceiling Fan Motor (48 inches, standard single phase)

• Typical thread consumption: 40–80 metres per motor
• Thread format: manual winding, 300 metre rolls
• One roll (300 metres) is sufficient for 4–7 motors
• One 1kg packet (6 rolls = 1800 metres) handles 20–40 motors

Table Fan Motor (standard single phase)

• Typical thread consumption: 20–40 metres per motor
• Smaller than ceiling fan motors, fewer slots
• One 300 metre roll handles 7–15 table fan motors

Submersible Pump Motor (0.5 HP to 1 HP)

• Typical thread consumption: 60–120 metres per motor
• More complex winding with tighter coils
• One 300 metre roll handles 2–5 motors depending on HP rating

Water Pump Motor (1 HP to 5 HP, single or three phase)

• Typical thread consumption: 80–200 metres per motor
• Three-phase motors use more thread due to three separate windings
• For high HP motors, 500 metre or 1000 metre cones may be more practical

Industrial Motor (3 HP to 10 HP, three phase)

• Typical thread consumption: 150–400 metres per motor
• Larger stators with more slots require significantly more thread
• Automatic winding machines with 1500 metre cones are practical for these motors

Large Industrial Motor (above 10 HP)

• Thread consumption: 300–800+ metres per motor
• These motors are almost always wound on automatic machines
• 1500 metre cones are the minimum practical format
• For very large motors, multiple cones may be needed per winding job

How to Calculate Your Monthly Thread Requirement

Use this simple formula for your workshop:

1. Count how many motors of each type you rewind per month
2. Multiply by the estimated thread consumption per motor from the table above
3. Add 20% buffer for wastage and variation
4. Convert to 1kg packets or cones accordingly

For example: A workshop rewinding 50 ceiling fan motors per month at 60 metres each = 3000 metres. Add 20% buffer = 3600 metres. At 1800 metres per 1kg packet, you need 2 packets per month.

Frequently Asked Questions

How many metres of thread does a ceiling fan motor winding need?

A typical ceiling fan motor rewinding requires approximately 40 to 80 metres of polyester thread depending on the motor size and winding pattern. A single 300 metre roll is more than sufficient for one ceiling fan motor. Most workshops buy thread in 1kg packets (6 rolls of 300 metres) for economy.

How many ceiling fan motors can be wound from one 1kg packet of thread?

One 1kg packet contains 6 rolls of approximately 300 metres each, totalling approximately 1800 metres. At an average of 50 to 60 metres per ceiling fan motor, one packet should be sufficient for 25 to 35 ceiling fan motor windings.

Does thread consumption vary between manual and automatic winding?

The total thread used per motor winding is approximately the same whether done manually or on an automatic machine. The difference is in the format: manual winding uses 300 metre rolls and automatic machines use 1500 metre cones.