Custom Elevator Pulley & Traction Sheave Manufacturer | Low Noise Nylon Sheaves

1. What Is an Elevator Pulley?

 

An elevator pulley, also known as a traction sheave or deflector sheave, is a critical component in elevator systems. It is responsible for:

· Transmitting power from the motor to the steel wire ropes

· Supporting smooth vertical movement of the elevator car

· Ensuring traction between rope and sheave groove

Unlike crane pulleys, elevator pulleys must meet strict safety, precision, and noise requirements.

 

2. Main Types of Elevator Pulleys

2.1 Traction Sheave (Drive Sheave)

 

Installed on the main drive motor.

Features:

· High precision groove machining

· High friction coefficient

· Core power transmission component

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2.2 Deflector Sheave (Guide Pulley)

 

Used to change the direction of wire ropes.

Features:

· No direct power transmission

· Ensures rope alignment

· Reduces system vibration

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2.3 Compensation Sheave

Installed at the bottom of the shaft.

Features:

· Balances rope weight

· Improves ride comfort

· Used in high-rise elevators

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2.4 Overspeed Governor Sheave

 

 

Safety-related pulley.

Features:

· Works with safety brake system

· Detects overspeed conditions

· Critical for elevator safety compliance

 

3. Elevator Pulley Model Classification

3.1 By Elevator Type

· Passenger elevator sheave

· Freight elevator sheave

· High-speed elevator sheave

· Machine-room-less (MRL) elevator pulley

 

3.2 By Drive System

· Geared traction sheave

· Gearless traction sheave

 

3.3 By Rope Groove Type

· U-groove (standard)

· V-groove (high traction)

· Undercut groove (high friction design)

 

4. Elevator Pulley Specifications & Parameters

Parameter	Typical Range
Diameter (D)	240 mm – 1000 mm
Rope Diameter	6 mm – 16 mm
Groove Type	U / V / Undercut
Groove Hardness	40–55 HRC (steel)
Friction Coefficient	≥ 0.08 – 0.12
Rotational Accuracy	≤ 0.05 mm
Load Capacity	Based on elevator capacity (320kg–2000kg+)
Noise Requirement	Low noise / vibration
Material	Steel / Nylon (noise reduction)

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5. Why Nylon Elevator Pulleys Are Gaining Popularity

 

 

Compared to traditional steel sheaves:

Feature	Nylon Pulley	Steel Pulley
Noise	Very Low	Higher
Vibration	Reduced	Higher
Rope Wear	Minimal	Moderate
Weight	Lightweight	Heavy
Maintenance	Low	Higher

👉 Especially suitable for:

· Residential elevators

· Hospital lifts

· Silent elevator systems

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6. How to Choose the Right Elevator Pulley

6.1 Based on Elevator Speed

· Low-speed (<1.0 m/s) → Standard pulley

· High-speed (>2.5 m/s) → High precision sheave

 

6.2 Based on Load Capacity

· Passenger elevator → Standard nylon or steel

· Freight elevator → Reinforced structure

 

6.3 Based on Noise Requirements

Residential / hotel → Nylon pulley preferred

 

6.4 Based on Rope Matching

👉 Key rule:

· Groove must match rope diameter precisely

· Improper groove = slippage + wear

 

7. About Jiangsu Haida Engineering Plastics Co., Ltd.

 

 

Jiangsu Haida Engineering Plastics Co., Ltd. specializes in high-performance engineering plastic components for lifting and elevator systems.

Our Strengths:

🔹 Custom elevator nylon pulleys

🔹 Precision CNC groove machining

🔹 High wear resistance materials (MC Nylon / PA6 / PA66)

🔹 Low-noise solutions for modern elevators

🔹 OEM & ODM support

👉 Applications:

Passenger elevators

· Freight elevators

· Escalator systems

· Lifting equipment

 

FAQ

Q1: What is the difference between a traction sheave and a deflector sheave?

A: The traction sheave drives the elevator, while the deflector sheave only changes rope direction.

 

Q2: Can nylon pulleys be used in elevators?

Yes, especially in low-noise and medium-load elevator systems.

 

Q3: What is the ideal pulley diameter for elevators?

Typically 40–50 times the rope diameter for optimal performance.

 

Q4: How to reduce elevator noise?

· Use nylon pulleys

· Improve groove precision

· Ensure proper rope alignment

 

Q5: Do you support custom elevator pulley design?

Yes, full customization based on drawings and specifications.

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