Screw Jack Apparatus | ProDynami – 1208
The Screw Jack Apparatus ProDynami – 1208 uses a bench-mounted turntable fitted with a metric square pitch screw jack thread. This Screw Jack Apparatus applies calibrated weights via a load hanger to produce known torque for studying mechanical advantage and friction loss. It supports comparison of lubricated and un-lubricated threads against theoretical results. A comprehensive instruction manual and full weight set are included.
The Screw Jack Apparatus ProDynami – 1208 is based around a bench-mounted base incorporating a turntable fitted with a metric square pitch screw jack thread. This Screw Jack Apparatus uses a cord wound around the turntable’s periphery, threaded over a pulley, to accept a load hanger with calibrated weights. It demonstrates screw thread efficiency and mechanical advantage.
Product Overview
This simple screw jack is based around a bench-mounted base incorporating a turntable fitted with a metric square pitch screw jack thread. The apparatus is stood on a firm bench and a cord is wound around the periphery of the turntable. The free end of the cord is threaded over a pulley and then hangs vertically to accept the load hanger supplied.
A set of calibrated weights is supplied which are suspended from the load hanger, thus producing a known torque on the system. To adjust the experimental parameters further, the calibrated weights can also be applied to the top surface of the turntable, extending the range of tests possible on this Screw Jack Apparatus. A comprehensive instruction manual for lecturer and student, giving full details on apparatus assembly and operation as well as example results, is provided. All necessary assembly and operational tools are provided.
Screw Jack Apparatus ProDynami – 1208, Technical Specifications
| Specification | Detail |
|---|---|
| Turntable | Approximately Ø250mm |
| Thread Outside Diameter | 20mm |
| Thread Pitch | 5mm |
| Effort Application | Can be applied to raise or lower the load |
| Weights | Set of weights supplied |
| Documentation | Comprehensive instruction manual provided |
Technical Data
Overall Dimensions (without rod)
| Parameter | Value |
|---|---|
| L x W x H | 390x345x200mm (approx) |
Base Plate
| Parameter | Value |
|---|---|
| Diameter | 250mm |
Load Weights
| Parameter | Value |
|---|---|
| Weights | 1kg, 2kg, 5kg |
Hangers
| Parameter | Value |
|---|---|
| Configuration | 2x 0.5N (each) |
Weights
| Parameter | Value |
|---|---|
| Set | 20x 0.1N, 4x 0.5N, 2x 1N, 2x 2N |
Key Features
- Turntable Diameter: approximately Ø250mm
- Thread Outside Diameter: 20mm
- Thread Pitch: 5mm
- Base Plate Diameter: 250mm
- Overall Dimensions: 390x345x200mm (approx), without rod
- Load Application: effort can be applied to raise or lower the load
- Weight Set: 1kg, 2kg, 5kg load weights plus hanger and calibration weights
- Torque Generation: calibrated weights suspended from load hanger produce known torque on this Screw Jack Apparatus
- Documentation: comprehensive instruction manual for lecturer and student
Experiments
- Efficiency of screw thread
- Mechanical advantage
- Determination of the friction loss
- Determination of velocity ratio
- Comparison of lubricated and un-lubricated screw threads
- Comparison of actual results with theoretical
Construction and Design
The Screw Jack Apparatus ProDynami – 1208 is built around a bench-mounted base incorporating a turntable, approximately Ø250mm in diameter, fitted with a metric square pitch screw jack thread. The thread has an outside diameter of 20mm and a pitch of 5mm. The base plate has a diameter of 250mm, and overall dimensions, without the rod, are approximately 390x345x200mm. A cord is wound around the periphery of the turntable, with its free end threaded over a pulley and hanging vertically to accept the load hanger. Calibrated weights, supplied as 1kg, 2kg, and 5kg load weights along with hangers rated 2x 0.5N each and a weight set of 20x 0.1N, 4x 0.5N, 2x 1N, and 2x 2N, are suspended from the load hanger or applied to the turntable’s top surface to produce known torque.
Scope of Delivery
- 1 experimental unit
- 1 instruction manual
- 1 set of weights
- 1 thread
Q: What is the Screw Jack Apparatus ProDynami – 1208 used for?
A: It is used to study screw thread efficiency, mechanical advantage, friction loss, and velocity ratio using a bench-mounted turntable and calibrated weights.
Q: What is the diameter of the turntable and base plate?
A: The turntable is approximately Ø250mm, and the base plate diameter is 250mm.
Q: What is the thread pitch and outside diameter?
A: The thread has a pitch of 5mm and an outside diameter of 20mm.
Q: What weights are included with the apparatus?
A: Load weights of 1kg, 2kg, and 5kg are included, along with hangers rated 2x 0.5N each and a weight set of 20x 0.1N, 4x 0.5N, 2x 1N, and 2x 2N.
Q: Can lubricated and un-lubricated screw threads be compared using this apparatus?
A: Yes, comparison of lubricated and un-lubricated screw threads is one of the experiments supported by this apparatus.
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