Skip to main content

### All About Gear

To transmit motion between two shafts. or a shaft and a slide.

Sliding motion between Gears tooth surfaces.

Omega = Angular Velocity (rad/s)

Omega1*Radius1 = Omega2*Radius2

Practical limit for Velocity Ratio...

for Spur Gears = 6

for Helical Gears = 10

for higher ratios, two or more Gear Pairs are used.

Parallel Shafts:

Spur Gears - since Line Contact,

- Sudden application of load,

- high impact stresses,

- excessive noise at high speeds.

Helical Gears - starts with a point contact and extends along a diagonal line across the teeth - low impact stresses, reduction in noise.

Spur Rack (infinite diameter), Pinion, Gear

External Gear, Internal Gear

External Pinion, External Gear => One rotates in CW, One rotates in CCW

External Pinion, Internal Gear => Both rotate in same direction

### It's Summer Here, How About Designing some Ice Cubes?

By the way I'm a Mechanical  Design Engineer. And I was pretty poor at designing. And I feel this is pretty easy way to learn to design things.  My Mantra towards designing things is (if you're not a pro), start with pretty basic geometry and build from there. Since you'll be building things only virtually, you shouldn't be wasting any material or energy. So, for the first tutorial let's move on with designing an ice cube. My choice of CAD software for accomplishing this would be Autodesk Fusion 360. Being a simple person and also a math fanatic, I start with simple geometries.. something like below. The next step I will be doing is to taper all the sides with a draft of 15 deg. After the modification the design will be altered as below. Fusion allows us to do this by rotating the side faces about the top edges by means of a  Mystic Wheel .  Note: There is another way to achieve the above design, by Lofting the above and below face sketches. And the reason for not

### Design Speed - How Fast you can Design

Analogy.. How fast you can speak depends on how fast your thoughts are (flow of thoughts) and.. how long have been Fast/Articulated Speaking. How fast you can type depends on Muscle Memory and.. Speed and Dexterity of fingers. Similarly, how fast you can design depends on your ability to manipulate 3d thoughts in your head and.. Familiarity with CAD software interface. First one is mental ability and second one is skill (which comes with practice) The latter can be improved within short time. But the former..

### Writing vs Designing

Both Writing and Designing are Creative fields.  For (Creative) Writing to happen, one should Read extensively. Have their fair share everyday. Similarly, to create (Great) Designs, one should feed themselves with other Designs. It's not about reproducing the same content. But, mix and matching the intrinsic features to create a completely new creature.