Pulley (Drive/Head): Power Capacity 0.5-500 kW

Component Specifications

Definition

The drive/head pulley is a critical component in conveyor belt systems, typically located at the discharge end where it receives power from a motor through a drive system (such as gear reducers or direct drives). It converts rotational mechanical energy into linear motion of the conveyor belt through frictional contact between the pulley surface and the belt. This component is responsible for initiating and maintaining belt movement, handling the primary load forces, and often includes features like lagging to increase friction and prevent slippage.

Working Principle

The pulley operates on the principle of friction-driven power transmission. When the motor rotates the pulley shaft, the pulley surface (often with rubber lagging) creates sufficient frictional force against the conveyor belt to overcome inertia and drag forces. The wrap angle of the belt around the pulley (typically 180-240 degrees) increases the contact area and frictional grip. Torque from the drive system is transferred to the belt, converting rotational motion into linear belt movement for material transport.

Materials

Carbon steel (ASTM A36 or equivalent) for the core structure with rubber lagging (SBR or ceramic tiles) for surface friction. Shafts are typically made of forged steel (ASTM A668 Class D or equivalent). Bearings are usually spherical roller bearings (ISO 15 series).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	200-1000 mm
Face Width	300-2000 mm
Power Capacity	0.5-500 kW
Shaft Diameter	50-300 mm
Maximum Belt Speed	0.5-5.0 m/s
Operating Temperature	-20°C to 80°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5288, DIN 22101, ISO 15236-1, DIN 22109

Parent Products

This component is used in the following industrial products

Infeed Conveyor Belt

A conveyor belt designed to receive and transport products into a processing or packaging system.

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Engineering Analysis

Risks & Mitigation

Belt slippage due to insufficient friction
Shaft failure from fatigue or overload
Bearing seizure from contamination or improper lubrication
Lagging detachment causing belt damage
Misalignment leading to premature wear

FMEA Triads

Trigger: Insufficient lagging friction or improper tensioning
Failure: Belt slippage reducing conveyor efficiency
Mitigation: Install ceramic lagging, maintain proper belt tension, implement automatic tensioning systems

Trigger: Corrosion or fatigue stress on shaft
Failure: Shaft fracture causing catastrophic system failure
Mitigation: Use corrosion-resistant coatings, implement regular NDT inspections, maintain proper shaft alignment

Trigger: Contaminated lubrication or excessive load
Failure: Bearing overheating and seizure
Mitigation: Implement automated lubrication systems, install temperature sensors, follow bearing maintenance schedules

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Shaft straightness: ±0.05 mm/m, Diameter tolerance: ±0.5 mm, Runout tolerance: ±0.1 mm

Test Method

Dynamic balancing to ISO 1940 G6.3, Non-destructive testing (UT/MT) per ASTM E165/E1444, Friction coefficient testing per ISO 9856

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Pulley (Drive/Head)

Manufacturer profiles associated with Pulley (Drive/Head).

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between drive pulley and head pulley?

In conveyor terminology, 'drive pulley' refers specifically to the pulley that receives power from the motor, while 'head pulley' indicates its position at the discharge end. Often these are the same component, serving both functions.

How often should pulley lagging be replaced?

Lagging replacement depends on operating conditions, typically every 2-5 years. Monitor for wear patterns, reduced friction, or visible damage to determine replacement timing.

What causes pulley misalignment and how to correct it?

Misalignment results from improper installation, foundation settling, or structural deflection. Correct by checking and adjusting pulley brackets, ensuring proper shaft parallelism, and verifying belt tracking mechanisms.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Pulley (Drive/Head)