DESCRIPTION
Technical Description
This benchtop unit is based on the vertical combination of a threaded spindle and a nut. It contains two spindles with trapezoid threads and varying lead. To match these spindles, three long nuts made of different materials with single lead, and a cast iron nut with a double lead are provided. A spring balance with a nylon cord enables a turning moment to be exercised on the spindle using a pulley. Additional weights can be placed on the rotating plate to change the axial load on the thread. The thread efficiency can be determined and compared using the measured values. The unit is portable and is equipped with anti-slip feet to ensure that it remains stable. The painted metal base plate is fitted with clips for the individual parts.
Learning Objectives / Experiments
- Determination of the coefficient of friction of a threaded spindle with
+ a cast iron nut
+ a bronze nut
+ a plastic nut
- Determination of the respective thread efficiency
FEATURES
Specification
[1] Benchtop experiment on thread efficiency with different materials
[2] 2 trapezoidal threaded spindles with different thread pitches
[3] 4 different nuts
[4] Steel plate and 2 additional weights for axial load
[5] Spring balance, cord and pulley to apply turning moment
Technical Data
Spindle threads
- TR30x6
- TR30x12P6
Nuts
- 3x single lead (cast iron, bronze, plastic)
- 1x double lead (cast iron)
Steel plate
- diameter: D=140mm
- weight: 30N
Load weights: 1x 10N and 1x 20N
Spring balance: 0...5N, graduations 0.05N
Dimensions and Weight
l x w x h : 300 x 300 x 300 mm
Weight : approx. 15 kg
Scope of Delivery
1 complete experimental apparatus
1 instruction manual
