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Whirling of Shaft Apparatus
Whirling of Shaft Apparatus (Product Code: SLE/MCE/81) is a rotor dynamics trainer used to find the critical (whirling) speeds and mode shapes of slender rotating shafts in mechanical engineering laboratories. Six high-strength steel rotor shafts of 3, 6 and 7 mm diameter and 600 or 900 mm length are driven by a 0.37 kW adjustable-speed motor up to 6000 rpm behind a transparent protective cover. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Rotor shafts | 6, high-strength steel |
| Shaft diameters | 3 mm, 6 mm, 7 mm |
| Shaft lengths | 600 mm, 900 mm |
| Other listed data | Diameter 80 mm; weight 1 kg |
| Experiment variables | Bearing spacing and shaft diameter; mode shapes of continuous rotor shafts |
| Motor | 0.37 kW, adjustable speed, digital display, potentiometer adjustment, 2 preselectable rotational speeds |
| Speed range | 0–6000 min⁻¹ (rpm) |
| Guard | Transparent protective cover for clear observation |
| Dimensions | 1400 x 600 x 800 mm |
| Weight | 85 kg |
| Power supply | 230 V, 50 Hz, 1 phase; or 230 V, 60 Hz, 1 phase; or 120 V, 60 Hz, 1 phase |
| Product code | SLE/MCE/81 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Whirling of Shaft Apparatus Used For?
Every slender shaft has speeds at which it bows outward and whirls, because the running speed coincides with a natural frequency of transverse vibration. Students fit a rotor shaft, raise the motor speed slowly with the potentiometers, and note on the digital display the speed at which the shaft visibly whirls, then compare it with the value calculated from shaft stiffness, mass and support conditions.
Repeating the run with the 3, 6 and 7 mm shafts, the 600 and 900 mm lengths and different bearing spacing shows how diameter, length and support position move the critical speed, while higher speeds reveal the mode shapes of a continuous rotor. The two preselectable speeds make it quick to return to a point of interest. Keep the cover closed and pass steadily through each critical speed; as engineering lab equipment in India for dynamics of machinery, it shows clearly why turbine and pump shafts are designed to run away from their critical speeds.
What to Specify When Ordering
- Power supply version: 230 V 50 Hz, 230 V 60 Hz or 120 V 60 Hz, single phase
- Spare rotor shafts, if you expect heavy student use (ask us)
- Number of units and the delivery location
OEM Manufacturer
ScienceLab manufactures the Whirling of Shaft Apparatus as the OEM at the licensed factory of Jain Scientific Equipments Private Limited in Saha, Ambala, Haryana, India. Engineering institutions, dealers and importers buy directly from the maker, so quotations, spare shafts and repeat orders are all handled by one company.
For institutional and tender vendor registration, the company's details are GSTIN 06AAECJ8618A1ZT and LEI 3358004HRD1JIVXKYX49. See the ScienceLab profile for more about the company.
Related Theory of Machines Equipment
Apparatus that builds the same rotor dynamics topic from different angles:
- Static and Dynamic Balancing Apparatus — the imbalance that excites whirling in real rotors.
- Free and Forced Vibration Apparatus — resonance studied on a spring-mounted beam.
- Free Vibrations Of A Cantilever — transverse vibration of a non-rotating member for comparison.
- Journal Bearing Demonstration — how rotating shafts are supported.
The Theory of Machines category lists all related trainers.
Frequently Asked Questions
What does the Whirling of Shaft Apparatus measure?
The Whirling of Shaft Apparatus is used to find the critical (whirling) speeds of rotating shafts and to observe the mode shapes of continuous rotor shafts, while varying bearing spacing and shaft diameter to see how each changes the result.
Which rotor shafts come with the Whirling of Shaft Apparatus?
The Whirling of Shaft Apparatus lists six rotor shafts of high-strength steel, with diameters of 3, 6 and 7 mm and lengths of 600 and 900 mm. Ask us through the contact page to confirm the exact diameter and length combination in the set.
What motor and speed range does the Whirling of Shaft Apparatus have?
The Whirling of Shaft Apparatus uses a 0.37 kW adjustable-speed motor running from 0 to 6000 min⁻¹ (rpm). Speed is set with potentiometers, shown on a digital display, and two rotational speeds can be preselected.
How does the Whirling of Shaft Apparatus protect users?
The Whirling of Shaft Apparatus has a transparent protective cover over the rotating shaft, so students can observe whirling and mode shapes closely without contact with moving parts. Keep the cover closed whenever the motor runs.
What space and power does the Whirling of Shaft Apparatus need?
The Whirling of Shaft Apparatus measures 1400 x 600 x 800 mm and weighs 85 kg. It is offered for 230 V 50 Hz, 230 V 60 Hz or 120 V 60 Hz single-phase supply, so state your mains supply when ordering.
Who manufactures the Whirling of Shaft Apparatus?
The Whirling of Shaft Apparatus is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India. Quotations for India and international markets come directly from the manufacturer.
Is a calibration certificate available for the Whirling of Shaft Apparatus speed display?
Calibration documents for the Whirling of Shaft Apparatus speed display are not stated in the product listing. If your department requires a calibration certificate, mention it in your enquiry so that availability can be discussed with us before ordering.
Request a Quote
Request a quotation for the Whirling of Shaft Apparatus (SLE/MCE/81) through the contact page, or add it to the enquiry cart with your power supply version and quantity. The manufacturer quotes you directly.
Last updated: 24 September 2026
