Rotavator Shaft – Steel Bright Bar Applications
A rotavator shaft is a heavy-duty rotating component used in agricultural tillage equipment
to transmit power from the tractor PTO to rotating blades.
It operates under high torsional load, soil impact, shock loading and continuous cyclic stress.
For this reason, rotavator shafts are manufactured from steel bright bars
with controlled chemistry, high strength and excellent fatigue resistance.
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Where Rotavator Shafts Are Used
- Agricultural rotavators and tillers
- Soil preparation equipment
- Seedbed preparation machinery
- Heavy-duty farming attachments
- Custom agricultural implements
Why Steel Bright Bars Are Used for Rotavator Shafts
- High torsional strength to transmit continuous power
- Excellent fatigue resistance under cyclic loading
- Good machinability for flanges, splines and keyways
- Uniform mechanical properties across length
- Reliable heat treatment response
Rotavator Shaft – Typical Geometry & Machined Features
Rotavator shafts incorporate blade mounting flanges, keyways and bearing seats.
Dimensional accuracy and concentricity are critical for vibration-free operation.
Common Steel Grades Used
| Application Type | Typical Steel Grades |
|---|---|
| Standard Rotavator Shafts | EN8, EN8D, C45 |
| Medium to Heavy Duty Applications | EN19 |
| Extreme Load Conditions | 42CrMo4 |
Typical Processing & Operations
- Cold drawn or peeled & polished bright bars
- CNC turning and machining
- Keyway cutting and flange machining
- Induction hardening (as required)
- Protective surface coating
Bright Bar Sections & Supply Form
- Round bright bars (primary section)
- Custom diameters based on design
- Straight lengths suitable for machining
Manufacturing & Quality Considerations
- Strict straightness and concentricity control
- Controlled chemistry for fatigue resistance
- Dimensional inspection at critical stages
- Traceability for agricultural OEM supply
Related Components
- PTO Shafts
- Coupling Shafts
- Flanged Shafts
Why Steelmet Industries?
- Bright bars engineered for heavy-duty agricultural use
- Supply of EN8, EN19 and alloy steel grades
- VD route steels available for fatigue-critical parts
- Inspection support via NABL-certified laboratories
FAQs
Why do rotavator shafts require high fatigue strength?
They operate continuously in soil under impact loads, making fatigue resistance critical
to prevent cracking and failure.
Which steel grade is commonly used?
EN8 and EN8D are widely used, while EN19 and 42CrMo4 are selected for heavy-duty operations.
Are rotavator shafts subjected to shock loads?
Yes. Soil resistance and stone impact generate fluctuating shock loads during operation.
Contact for Enquiries
For sourcing steel bright bars for rotavator shaft manufacturing: