Plz answer this in 40 min, i need the answer ASAP,thx mechanical engineering Determine from the image below: 1. Types of gears in below gearbox. 2. module 3. surface width (tooth width), and 4. Outer diameter of pinion and gear.

According to the question ,

1. Types of gears in the given gear box is worm and worm wheel gear.

• These gears are used for when higher speed reduction is required.
• The Worm Gear Box reduction is defined as the ratio of  the number of starts of the worm and number of teeth on the worm gear.
• Worm gear  are used to transmit power between non-parallel, non-intersecting shafts, in which shaft are aligned perpendicular to each other.
• The direction of rotation of the worm wheel depends upon the direction of rotation of the worm.
• The worm teeth can move in a left-hand or right-hand direction. But  right hand worm and worm gear sets are considered standard.

2. Module-

In worm and worm wheel gear, teeth are spiral in shape. 

Module is defined as the ratio of diameter of worm to the number of teeth of the worm wheel.

$$\begin{gathered} 1-worm \\ 2-worm wheel \\ {\lambda }_1=lead angle \\ {m}_2=module of worm wheel \\ {m}_2=m=\frac{D}{T} \\ Normal module, \\ {m}_n=m_2\cos {\lambda }_1 \end{gathered}$$