Whirling of Shaft Apparatus
Product Code : EL-DOMLE-10781
Whirling of Shaft Apparatus (code EL-DOMLE-10781) is an experimental unit for demonstrating the critical speeds, modes of oscillation and resonances of rotors with continuous mass distribution. Six thin, elastic rotor shafts of high-strength steel, 3, 6 or 7 mm in diameter and 600 or 900 mm long, are driven by a 0.37 kW motor at 0-6000 min-1, and an 80 mm, 1 kg steel disc turns a shaft into a Laval rotor.
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Specifications
| Parameter | Detail |
|---|---|
| Rotor shafts | 6, thin and elastic, high-strength steel |
| Shaft diameters | 3 mm, 6 mm, 7 mm |
| Shaft lengths | 600 mm, 900 mm |
| Rotor disc | Steel, 80 mm diameter, 1 kg; for assembling a Laval rotor with discrete mass distribution |
| Bearings | Free choice of bearing arrangement; adapters compensate for different shaft diameters |
| Catch bearings | Limit the amplitude of oscillation |
| Coupling | Elastic coupling for the rotor's freedom of movement |
| Motor | 0.37 kW, 0–6000 min-1, speed electronically controlled |
| Speed control | Digital display, adjustment with potentiometers, 2 rotational speeds can be preselected and switched as required |
| Guard | Transparent protective cover for observing the experiment |
| Optional | Set of vibration sensors for displaying the rotor path on an oscilloscope |
| Experiments | Critical rotational speeds on simply loaded and continuous shafts; mode shapes of continuous rotor shafts; variation of bearing spacing and shaft diameter |
| Power supply | 230 V, 50 Hz, 1 phase; 230 V, 60 Hz, 1 phase; or 120 V, 60 Hz, 1 phase |
| Dimensions | 1400 × 600 × 800 mm approx. (L × W × H) |
| Weight | 85 kg |
| Product code | EL-DOMLE-10781 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Whirling of Shaft Apparatus Used For?
A rotating shaft whirls, bowing out into large deflections, when its speed reaches a critical speed that matches one of its natural frequencies of bending, and a continuous shaft has several such speeds, each with its own mode shape. Students fit a shaft in the chosen bearing arrangement, close the transparent cover and raise the motor speed slowly, watching the shaft bow into its first and higher modes while the catch bearings limit the amplitude. Changing the shaft diameter or bearing spacing, or adding the rotor disc, shows how each affects the critical speed, and the optional vibration sensors let the rotor path be shown on an oscilloscope.
What to Specify When Ordering
- Quantity — the number of apparatus required.
- Vibration sensors — whether the optional set of vibration sensors for oscilloscope display is wanted.
- Power supply — 230 V 50 Hz, 230 V 60 Hz or 120 V 60 Hz single phase.
Frequently Asked Questions
What does the Whirling of Shaft Apparatus demonstrate?
It shows how rotors with continuous mass distribution oscillate and resonate, and lets students find the critical rotational speeds of simply loaded and continuous shafts.
Which rotor shafts are supplied?
Six thin, elastic rotor shafts of high-strength steel are supplied, in diameters of 3 mm, 6 mm and 7 mm and lengths of 600 mm and 900 mm.
What is the rotor disc for?
The 80 mm diameter, 1 kg steel disc is fitted to assemble a Laval rotor, which has a discrete rather than continuous mass distribution.
How is the motor speed set?
The 0.37 kW motor runs from 0 to 6000 min-1 under electronic control; speed is adjusted with potentiometers, shown digitally, and two speeds can be preselected and switched as required.
What details should an export enquiry give?
Please give the number of units, the destination country and port or city, the delivery terms required, for example FOB or CIF, any special packing and the tender reference if the purchase is tendered.
How is the oscillation kept within safe limits?
Catch bearings limit the amplitude of oscillation, and a transparent protective cover lets the experiment be observed safely while the shaft is running.
OEM Manufacturer
Buyers of the Whirling of Shaft Apparatus deal directly with its maker, Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd), whose works are at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests dynamics of machines apparatus such as governors, gyroscopes, cams and balancing machines, supplies engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and builds to institution-specific requirements on request. Tender details are on the Tenders/OEM page.
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See the full Dynamics of Machine Lab Equipment range or all Mechanical Engineering Lab Equipment.
Request a Quote
For this and other dynamics of machine lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. Quotations are given on request: send the number of apparatus and whether the optional vibration sensor set is needed and your delivery location through the contact page, or add the Whirling of Shaft Apparatus to the enquiry cart from this page.
Last updated: October 2026
