Tag Archives: hole
Jun
Torricelli's Principle
A tank with a circular hole of diameter d and at a depth h discharges water at a rate of Q.
The discharge rate is derived from Torricelli’s Principle and given by:
where
Q =discharge rate (m³/s)
h =depth of water (m)
A =area of opening (m²)
g =acceleration due to gravity (9.81 m/s²)
Torque, Speed and Power in a Gearmotor
The system represented consists of an electric motor and a gearbox. The calculator is designed to obtain the technical specifications at the output of the gearbox. To use this calculation tool, input data as detailed in the following protocol:
MOTOR:
- Rotational Speed: Input the speed at which the motor rotates, expressed in revolutions per minute.
- Power: Input the power that the motor is capable of generating, specified in kilowatts.
From these inputs, the calculator will generate the Nominal Torque, which will display the nominal torque the motor can develop based on the input rotational speed and power.
GEARBOX:
Input information pertaining to the gearbox that will be connected to the motor.
- Transmission Ratio: Input the ratio of the gearbox’s input and output speeds.
- Efficiency: Input the gearbox’s capability to conserve power during transmission, expressed as a decimal value (for example, 0.80 for an efficiency of 80%).
OUTPUT:
- Rotational Speed: The calculator will show the new output shaft speed after passing through the gearbox, based on the transmission ratio.
- Nominal Torque: Will show the torque available at the gearbox output, adjusted according to the efficiency input previously.
- Useful Power: Will display the effective power at the output, taking into account the losses associated with the efficiency of the gearbox.
Mar
Rotation speed in 3-phase induction motor
The number of poles determines the nominal rotation velocity, when motor is connected by contactor.
Nov
3D printed parts samples
Jul
Countersinks
Countersink for DIN 7991, DIN 7987, DIN 7988, DIN 87, DIN 88, DIN 7513, DIN 7516
DIN 75
FORM B
This Calculator provides the values of the countersink for next countersunk head screws :
DIN 87, form B
DIN 7987, form B
DIN 7991, form B
DIN 88, form B
DIN 7988, form B
DIN 7514 , form D and E from M6
DIN 7516, form B and C
Countersink for DIN 912
DIN 75
Countersink for DIN 84
DIN 75