- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Journal Bearing Demonstration
Journal Bearing Demonstration (Product Code: SLE/ETM/03) is a floor-standing lubrication apparatus used to show how an oil film builds pressure around a rotating shaft in theory of machines and tribology laboratories. A motor-driven steel shaft turns inside a clear acrylic bearing with an extra-large clearance, and 16 pressure tappings feed a rear manometer panel so the oil pressure head at every point is visible at once. It is produced by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India, as part of its lab equipment for technical institutes.
Specifications
| Parameter | Detail |
|---|---|
| Construction | Floor-standing |
| Shaft | Plain steel, directly driven by an electric motor |
| Bearing | Clear acrylic shell, freely supported on the motor shaft and sealed with a rubber diaphragm |
| Clearance | Especially large, to show the oil in the bearing clearly |
| Pressure tappings | 12 equi-spaced around the circumference plus 4 along the topside and on a vertical radial plane (16 in total) |
| Manometer | Rear manometer panel connected by light, flexible plastic tubes; shows the oil pressure head at all 16 points |
| Loading | Weights attached to arms connected to the bearing |
| Speed control | Control unit adjusts motor speed in both directions; display shows motor speed |
| Oil supply | Adjustable reservoir feeding the low-pressure region at both ends of the bearing |
| Supplied with | A container of suitable oil |
| Product code | SLE/ETM/03 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Journal Bearing Demonstration Used For?
Students load the bearing with weights on its arms, run the shaft at a set speed and read the oil pressure head on all 16 manometer tubes at once. The 12 circumferential readings give a polar plot of pressure around the journal, showing where the film pressure peaks and where it falls away, while the four extra tappings show how pressure varies along the top of the bearing and on the vertical plane.
Repeating the test at different speeds and loads, and in both directions of rotation, shows how the pressure pattern follows the running conditions, while the extra-large clearance makes the oil wedge visible through the acrylic. Set the reservoir level before starting, clear any air from the manometer tubes, and let readings stabilise after each change. The unit suits tribology and machine design classes that rely on engineering lab equipment in India.
OEM Manufacturer
This journal bearing demonstration is manufactured by ScienceLab, the trading name of Jain Scientific Equipments Private Limited, which is its OEM. Production and assembly take place at the company’s own licensed factory at Saha, Ambala, Haryana, India, and the apparatus is supplied factory-direct to technical universities, engineering colleges, TVET institutes, dealers and importers in India and international markets.
If you later need replacement manometer tubing, a spare diaphragm or additional sets, the manufacturer can quote them directly — ask us. Company details are on the ScienceLab profile.
Related Theory of Machines Equipment
Apparatus that extends a lubrication and bearings practical:
- Air Bearing Apparatus — the same pressure-distribution study with an air film.
- Michell Pad Apparatus — oil-film lubrication in a tilting-pad bearing.
- Hertzian Contact Apparatus — contact between surfaces with no lubricant film between them.
- Friction Slide Apparatus — dry sliding friction, for comparison with lubricated contact.
More apparatus is listed under Theory of Machines.
Frequently Asked Questions
How many pressure tappings does the Journal Bearing Demonstration have?
The Journal Bearing Demonstration has 16 pressure tappings: 12 equally spaced around the bearing circumference and four more along its topside and on a vertical radial plane, all connected to the rear manometer panel.
How is the bearing loaded?
Students load the Journal Bearing Demonstration by attaching weights to arms connected to the bearing, which is freely supported on the motor shaft. Changing the weights shows how load alters the oil pressure distribution.
Can the shaft run in both directions?
Yes. The control unit of the Journal Bearing Demonstration adjusts motor speed in both directions of rotation, and a display shows the motor speed, so the effect of reversing the shaft on the oil film can be observed.
Is oil included with the apparatus?
Yes, a container of suitable oil is supplied with the Journal Bearing Demonstration. An adjustable reservoir feeds this oil to the low-pressure region at both ends of the bearing during operation.
Why is the bearing clearance so large?
The Journal Bearing Demonstration uses an especially large clearance so the oil in the bearing can be seen clearly through the clear acrylic shell, making the formation of the lubricating film visible to a whole class.
Who manufactures the Journal Bearing Demonstration?
The Journal Bearing Demonstration is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory in Saha, Ambala, Haryana, India, and is supplied factory-direct to institutions in India and international markets.
What should a quotation request include?
For a Journal Bearing Demonstration quotation, give the number of units, the delivery location and any spare parts you want included. Quotations are issued directly by the manufacturer through the contact page or the enquiry cart.
Request a Quote
Request a price for the Journal Bearing Demonstration straight from the manufacturer via the contact page, or add it to the enquiry cart with any other bearing apparatus you need.
Last updated: 24 September 2026
