Machine Design
When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / 3m)
√(3m /Pmax)
√(Pmax / 2m)
√(Pmax / m)

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Machine Design
A bolt of M 24 × 2 means that

Cross-sectional area of the threads is 24 mm²
The pitch of the thread is 24 mm and depth is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm
The nominal diameter of bolt is 24 mm and pitch is 2 mm

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Machine Design
Turn buckle has

Left hand threads on one end and right hand threads on other end
Right hand threads on bout ends
No threads
Left hand threads on both ends

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