How do you draw a spur gear?

How do you draw a spur gear?

How to design a Spur Gear (with Equations)

  1. Adding Variables. Go to: Tools > Equations, then add these under Global Variables:
  2. Drawing the Gear’s outline. Draw a circle, then assign its diameter to “Head Diameter”.
  3. Adding a Bore (Optional)
  4. Extruding the Sketch (Base)
  5. Drawing the Gear’s teeth inbetweens.
  6. Creating the Gear’s teeth.
  7. Improving the looks (Optional)

How do you draw a spur gear by hand?

Now draw this gear wheel on the grid by following these steps:

  1. Step 1: Draw two crossing centrelines to mark the centre of the gear wheel.
  2. Step 2: Draw the pitch circle using a compass.
  3. Step 3: Draw the outside diameter using a compass.
  4. Step 4: Draw the inside diameter.

How do you fit a spur gear?

  1. Step 1 – Remove the Flywheel. Using a socket wrench remove the engine cover.
  2. Step 2 – Remove the Engine from the Frame.
  3. Step 3 – Remove the Clutch.
  4. Step 4 – Remove the Idler Gear (Spur Gear)
  5. Step 5 – Replace the Gear.
  6. Step 6 – Reassemble the Motor.

How does a spur gear work?

Spur gears are a type of cylindrical gear, with shafts that are parallel and coplanar, and teeth that are straight and oriented parallel to the shafts. Because of this, spur gears are typically used for lower speed applications, although they can be used at almost any speed.

What is the minimum number of teeth on spur gear Why?

3.5 Undercutting For pressure angle 20 degrees, the minimum number of teeth free of undercutting is 17. However, gears with 16 teeth or less can be usable if their strength and contact ratio pose any ill effect.

How do you check a gear module?


  1. Count how many teeth a sample spur gear has z =
  2. Measure its tip diameter da =
  3. Estimate an approximation of its module, assuming that it has an unshifted standard full depth tooth, using the equation:
  4. Measure the span measurement of k and the span number of teeth.
  5. This difference represents pb = πm cos α

How do you determine gear size?

For this example, imagine a gear with a radius of 3 inches. Multiply this measurement by 2: 3 × 2 = 6 inches. Divide the number of teeth on the gear by this measurement. For example, if the gear has 28 teeth: 28 / 6 = 4.67.

What is law of gearing?

In other words, the common normal at the point of contact between a pair of teeth must always pass through the pitch point. This is the fundamental condition which must be satisfied while designing the profiles for the teeth of gear wheels, it is also known as the law of gearing.

How is gear backlash measured?

a) Circumferential backlash jt Assemble one pair of gear with designated centre distance, fix one side of gear, put an indicator (Dial gauge) to Pitch circle of Mating gear and turn gear to the left and right to measure the amount of backlash.

How do you adjust the backlash on a differential?

They work by tightening one side and loosening the other side to move the differential sideways. If your rear end does not use adjusters, then you need to adjust backlash by using shims. By placing various thickness shims on either side of the differential, you can adjust backlash.

What are the symptoms of a bad differential?

5 Signs of a Failing Differential

  • Tire Damages. If you notice strange damages on the sidewall and outer tread of your vehicle’s tires, it may be caused by failing differential components.
  • Hard to Handle.
  • Vibrations.
  • Gears Grinding.
  • Whining Sounds.

How do you adjust pinion depth?

Pinion Depth – The distance from the face of the pinion gear to the centerline of the ring gear. This is adjusted by adding or subtracting shims to the inner pinion bearing.

Do you need a pinion depth tool?

Pinion depth gage is used for production, but if you go by the tooth contact bearing & backlash, the gage isn’t needed.

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