Blade Shaft: Torque Capacity 50-2000 Nm, Diameter 20-100 mm

Component Specifications

Definition

The blade shaft is a critical rotating component in inlet/outlet dampers or vanes, designed to transfer mechanical power from actuators to multiple blades simultaneously. It ensures synchronized blade movement for precise airflow modulation in ducts, HVAC systems, or industrial ventilation. Typically mounted horizontally or vertically, it features keyways, splines, or mounting points for blade attachment and bearing surfaces for smooth rotation under operational loads.

Working Principle

The blade shaft operates on rotational torque transmission principles. When an actuator (electric, pneumatic, or manual) applies torque to one end, the shaft rotates uniformly along its axis. This rotation is transferred to attached blades via mechanical connections (keys, set screws, or welded joints), causing all blades to pivot in unison. The angular position of the shaft determines the blade orientation, thereby controlling the open/closed percentage of the airflow passage. Precision bearings or bushings support the shaft to minimize friction and maintain alignment under thermal and mechanical stresses.

Materials

Common materials include: Carbon steel (AISI 1045, 4140) for general applications; Stainless steel (304, 316) for corrosive environments; Aluminum alloys (6061-T6) for lightweight needs; Alloy steels for high-torque applications. Surface treatments: Zinc plating, powder coating, or passivation for corrosion resistance. Hardness: Typically 30-45 HRC for steel shafts to resist wear.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	500-3000 mm
Max RPM	50-200
Diameter	20-100 mm
Surface Finish	Ra 1.6-3.2 μm
Torque Capacity	50-2000 Nm
Straightness Tolerance	0.1 mm/m

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 286-2, DIN 748-3, ISO 1101

Parent Products

This component is used in the following industrial products

Inlet/Outlet Dampers or Vanes

Flow control devices installed at the inlet or outlet of an ID (Induced Draft) fan to regulate air/gas volume and pressure.

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Engineering Analysis

Risks & Mitigation

Shaft misalignment causing binding
Corrosion in humid environments
Fatigue failure from cyclic loading
Wear at bearing surfaces

FMEA Triads

Trigger: Improper alignment during installation
Failure: Increased friction, overheating, and eventual seizure
Mitigation: Use precision alignment tools during assembly and conduct run-out tests

Trigger: Inadequate lubrication
Failure: Accelerated wear and premature bearing failure
Mitigation: Implement scheduled lubrication protocols with compatible greases

Trigger: Excessive torque from actuator
Failure: Shaft deformation or fracture
Mitigation: Install torque limiters and regularly calibrate actuators

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm on diameter, ±0.1° on angular position

Test Method

Torque testing per ISO 898-1, dimensional inspection with CMM, and rotational balance testing

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Blade Shaft

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

HX Packaging

Yantai, Shandong, CN

Also makes: Powder Packaging Machine, High-Speed Rotary Bottle Filling Machine, High-Speed Rotary Bottle Capping Machine and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “cutting blade shaft”
View source page ↗ hx-packaging.com · checked 2026-09-05

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 primary function of a blade shaft?

To transmit rotational torque from an actuator to multiple damper blades, ensuring synchronized movement for accurate airflow regulation.

How do you select the right material for a blade shaft?

Consider operational environment (corrosion, temperature), torque requirements, and weight constraints. Stainless steel is preferred for harsh conditions, while carbon steel offers cost-effectiveness for standard applications.

What maintenance is required for blade shafts?

Regular lubrication of bearings/bushings, inspection for wear or corrosion, and alignment checks to prevent binding or excessive vibration.

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.

Blade Shaft