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Q: What is the gear ratio if driving gear has 20 teeth?
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How many teeth are on a ring gear and pinion for a 4.11 gear ratio?

One key to this design problem is to remember that gears must have a whole number of teeth. It is impossible to roll a gear against another gear that has, say, half, a tooth somewhere among the whole teeth. So gears always have a whole number of teeth. Another key is that the gear ratio is the ratio of the numbers of teeth on two gears, N1 divided by N2. The result of this division often produces a fraction AND the fraction is often ROUNDED OFF in printed materials. Because of this round-off, you cannot be certain what the actual fraction is. This means that, even when you find whole-number values for N1 and N2, you cannot be certain that they represent the exact numbers. So, here is how to find the pair of gears from a given gear ratio such as 4.11. First, examine the fraction, 0.11, from the ratio. Find a whole number m such that m times the fractional part of the gear ratio gives another whole number almost exactly? Try m = 2, 3, 4 ... up to 16 or even more until you find a good fit. For the given problem, 9 x 0.11 = 0.99, which is almost 1. That whole number m is the SMALLEST possible number of teeth for one gear. Multiply the gear ratio by m and round to a whole number to get the least number of teeth on the second gear. So, 9 teeth is the smallest number of teeth for one gear and 9 x 4.11 = 36.99 (that is, 37) is the smallest number of teeth for the other gear. You can multiply the number of teeth on both gears by any whole number without changing the gear ratio. So, 2 x 9 = 18 teeth and 2 x 37 = 74 teeth also have the ratio 37 / 9 = 4.11111... Here is how to tweak the result if the fraction you chose didn't give a satisfactory result: Multiply the number of teeth from the trial answer by any whole number, say 2 or 20. 20 x 9 = 180 and 20 x 37 = 740 Now subtract 1 from the number of teeth on the larger gear and calculate the gear ratio. 740 - 1 = 739 and 739 / 180 = 4.105555... Alternatively, add a tooth to the larger gear and check that ratio: 741 / 180 = 4.116666... One key to this design problem is to remember that gears must have a whole number of teeth. It is impossible to roll a gear against another gear that has, say, half, a tooth somewhere among the whole teeth. So gears always have a whole number of teeth. Another key is that the gear ratio is the ratio of the numbers of teeth on two gears, N1 divided by N2. The result of this division often produces a fraction AND the fraction is often ROUNDED OFF in printed materials. Because of this round-off, you cannot be certain what the actual fraction is. This means that, even when you find whole-number values for N1 and N2, you cannot be certain that they represent the exact numbers. So, here is how to find the pair of gears from a given gear ratio such as 4.11. First, examine the fraction, 0.11, from the ratio. Find a whole number m such that m times the fractional part of the gear ratio gives another whole number almost exactly? Try m = 2, 3, 4 ... up to 16 or even more until you find a good fit. For the given problem, 9 x 0.11 = 0.99, which is almost 1. That whole number m is the SMALLEST possible number of teeth for one gear. Multiply the gear ratio by m and round to a whole number to get the least number of teeth on the second gear. So, 9 teeth is the smallest number of teeth for one gear and 9 x 4.11 = 36.99 (that is, 37) is the smallest number of teeth for the other gear. You can multiply the number of teeth on both gears by any whole number without changing the gear ratio. So, 2 x 9 = 18 teeth and 2 x 37 = 74 teeth also have the ratio 37 / 9 = 4.11111... Here is how to tweak the result if the fraction you chose didn't give a satisfactory result: Multiply the number of teeth from the trial answer by any whole number, say 2 or 20. 20 x 9 = 180 and 20 x 37 = 740 Now subtract 1 from the number of teeth on the larger gear and calculate the gear ratio. 740 - 1 = 739 and 739 / 180 = 4.105555... Alternatively, add a tooth to the larger gear and check that ratio: 741 / 180 = 4.116666...


Why use different gear sizes to get same gear ratio?

The gear ratio is the ratio of the number of teeth in the cogs, so 10 and 20 teeth produces the same effect as 20 and 40. As for why you'd use different sizes, it can depend on the size of the case or housing of whatever transmission, differential, drivetrain, etc. that is involved. Obviously, you'd use larger gears so they can withstand heavier use.


What is the gear ratio for Honda's CRF230F?

The gear ratio for the different gears of this bike is: 1 gear 2.769 (36/13) 2 gear 1.941 (33/17) 3 gear 1.450 (29/20) 4 gear 1.148 (31/27) 5 gear 0.960 (24/25), 6 gear0.812 (26/32).


Gear oil to use in rm 125 1992?

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What is the gas mileage on a 1966 dodge dart sdn with a 273 engine?

about 18 to 20 MPG. depending on the rear end gear ratio.


What is the ratio 57 to 20 as a fraction?

The ratio is 57/20 which cannot be simplified.The ratio is 57/20 which cannot be simplified.The ratio is 57/20 which cannot be simplified.The ratio is 57/20 which cannot be simplified.


My 1995 dodge stratus will come out of gear when driving at higher speeds then when you slow down to 20 mph it will go into 2nd gear and you can't get it out of that gear Anyone else have this sameb?

I am having the same problem and have not taking the car to the shop yet


How do you tell if you have an m20 or m22 transmission in a 1974 Corvette?

How do you tell the difference between the (M20,M21) and the M22 transmission, you can not really tell by looking at the case ,the difference is the actual cut of the gears,the M20 and M21 have a much greater angle to the teeth of the gear and also will have a twist in the teeth (helical bend), the M22 gear is a more straighter cut gear teeth and also thicker and wider gapped teeth. Muncie 4-speeds were produced in two different ratios wide ratio (M-20) and close-ratio (M-21). An extra heavy duty close-ratio version (M-22) was also offered on many of the big-block high-performance models.The choice of transmission was dictated by the engine size and rear-axle ratio. Axle ratios of 3.73 and lower (numerically higher) came with close-ratio transmissions, while axle ratios of 3.55 and higher (numerically lower) used wide-ratio transmissions. In addition, many GM high-performance engines came with M-22


How many rotations per minute does a car starter turn?

. "The ratio of the number of teeth on the ring gear and the starter drive pinion gear is usually between 15:1 and 20:1. This means the starter motor is rotating 15 to 20 times faster than the engine. Normal cranking speed for the engine is about 200 rpm. If the starter drive had a ratio of 18:1, the starter would be rotating at a speed of 3,600 rpm. If the engine started and was accelerated to 2,000 rpm, the starter speed would increase to 36,000 rpm. This would destroy the starter motor if it was not disengaged from the engine."


What is the base ratio for 20?

A ratio is when two numbers are shown in relationship to one another.the base ratio for 20 can be written as : 20 /1.that is 20 : 1.


How much miles per gallon does a 1966 dodge coronet 318 5.2 L get?

depending on the rear gear ratio usually around 18 to 20 MPG.