Gear ratios are important as they allow us to better control speed and torque. The gear mesh is adjustable in order for you to have the ability to change the gear ratio by using different pinion and spur gears. Gear progression is the key. It’s most likely that gearing up will make everything run a bit hotter, and shorten … The gear ratios are correct. A bigger pinion or smaller spur gear makes the vehicle have more top speed, at a decrease in acceleration. (Mod 1). In either case, it is important to make the correct adjustments in the gear mesh for best performance and reduced wear. As an example, a 120 spur and 20 pinion equals a 6 to 1 ratio. This particular version focuses on 48P gears (48p refers to the pitch of each tooth on the pinion gear). There are only 3 possible outcomes after you set the gear mesh. But it can also reduce your top speed and fuel economy. In the example below, the output shaft of gear set number one is connected to the input shaft of gear set number two. Seventh and eight are overdrive gears. Determine if there is significant wear occurring at the tips of the teeth on the spur gear. 4WD vehicles also usually have a one-speed transmission, and are gear and propeller shaft driven or belt and pulley driven. A gear ratio of 1:8.0 means that if the motor rotates eight times, the wheels spin one time. To find the gear ratio, simply divide the spur gear by the pinion gear. Therefore the spur gear 93T & motor gear 28T are needed So easy Source: … Team Novak - Brushless motor gearing recommendations Les recommendations de Team Novak à propos … Gears & Ratios … In this image, ripple voltage is produced by a 4s, RC LiPo Battery Power & Configuration Calculator, RC Drone Max Distance and Maximum Flight time Calculator, Brushless Motor Kv – Measure a Motor’s Kv, Understanding Electricity – For RC vehicles, Measuring Electricity – Voltage, Current, Power, RC Electric Boats – Guide for Successful Electric Boating, RC Sailboat Controls – Radio Layout, Radio Setup, Here is why you need to Buy the Highest C rating RC LiPo, What is the Purpose of a Slipper Clutch on an RC Car. The gear ratio is simply the number of teeth of one gear divided by the number of teeth of a mating gear. There’s two gears on your RC, the pinion gear and the spur gear. To find the gear ratio, simply divide the spur gear by the pinion gear. The aim here is to bring the pinion gear away by about 15-20% of the overlapping distance. Low ratio gears are gears where the pinion gear (attached to the motor) has fewer teeth than the ring gear (the gear it turns). Once everything is centered up, tighten the pinion set screw down. Use the chalk or paint pen. 0. Gear Ratio: To calculate the car’s gear ratio, you need to be familiar with the type of drivetrain it has. Lastly, if you like to use rollout to calculate the size pinion gear you need. Gearing is basically the ratio of the Spur and the Pinion. This means that the motor must turn 9 times to fully rotate the wheels of the car once. To equate the pinion to spur ratio, a simple formula is used: Pinion to Spur gear ratio = # of teeth on spur gear / # of teeth on pinion gear To give an example, assume you have a 25 tooth pinion gear and a 100 tooth spur gear installed on your car. There should be a small amount of space between the meshing gears where you can see light through. For every 10 turns of the input shaft, the output shaft turns once. In many RC vehicles, multiple sets of gears are used. Optimal mesh is achieved when 80-85% of the gears are overlapped. If we move let’s get it then put it back again. What does a diff do? In this case, bring both the pinion and spur gear together until it feels like the gears bottom out on each other. You can alter your car’s gear ratio by using a different pinion or spur gear. Adjust the Gear Ratio. Spur Gear in Motion For example, gear box is a type of gear train, that is used to increase engine torque and reduce speed at the car wheels. In this image, ripple voltage is produced by a 4s, RC LiPo Battery Power & Configuration Calculator, RC Drone Max Distance and Maximum Flight time Calculator, Brushless Motor Kv – Measure a Motor’s Kv, Understanding Electricity – For RC vehicles, Measuring Electricity – Voltage, Current, Power, RC Electric Boats – Guide for Successful Electric Boating, RC Sailboat Controls – Radio Layout, Radio Setup, Here is why you need to Buy the Highest C rating RC LiPo, What is the Purpose of a Slipper Clutch on an RC Car. Slide the new Pinion on, re-install in car (if applicable), and adjust the Gear mesh. Common metals include Aluminium, Steel and Titanium. Check the factory suggested gear ratio first 2. How to Choose the Best Gear Ratio. A car tuned to run the tunnel drags at SSR7 will develop a great gear ratio setup. Transmitter This is the radio of “radio control” and is often simply referred to as the radio. This means that for every 6 turns the motor rotates, the wheels rotate 1 time. Gear Machine - RC car ratio calculator. 0. Then set your … Pairing this gear up with a new spur gear will only wear the crap out of the new spur gear. In a 4.10 gear set you will have to rotate the pinion gear 4.1 times to rotate the ring gear once. (Remember that lowering the ratio produces a higher number.) And the ratios can't be changed just like in real life. Typically, the pinion gear is made of metal and the spur gear is made from a form of plastic or nylon. Tools to adjust the Gear Mesh on your RC vehicle. Both of these gears can stimulate a reasonable speed. Yes, i have a okay. First you have to know the fixed (second) gear ratio in your car. Spur gear: large gear that is on the chassis. Gear ratios can be confusing when there are multiple sets being used. Iit is important to properly set gear mesh for optimum performance. Bring the two meshing gears together and apply a small amount of pressure to jam the piece of paper. Backlash causes wear when you must switch the direction of motion frequently. Look at the gear ratio list 4. I will help you find what your RC vehicle’s gear ratio first, and then apply it to the final drive The pinion gear on the motor is the first gear that is in a set. This app quickly calculates ranges of RC car gear ratios for you to compare. Unfortunately, this symptom will not provide you with much of a warning. The gear ratio calculator uses 2 combinations of gears to output an overall drive ratio. Most RC Car’s allow you to adjust the gear mesh by adjusting the location of the motor. A good way to prevent this is to check the mesh of the gears before driving your RC Car or Truck. The gear ratio, like you, can’t, see right now, so take a closer look at this. Tools to adjust the Gear Mesh on your RC vehicle. Now it is time to set the gear mesh itself. These parts are sold as assembled, plug-in components; you don’t have to solder anything or know about wiring schematics to install or use them. For example 32 Pitch or Metric Module 1. Why use a Cap Pack on an RC Car? Also place a mark on the back of one of the rear tires. To prevent further damage, stop the vehicle and adjust the gear mesh to be not as tight. The transmitter h… The next gear ratio is an internal transmission ratio or most commonly a differential gear ratio. On an electric car, the Pinion is changed by loosening the screws to the motor (or, in some cases, removing it from the car) and then removing the Pinion. While the engine is idling on the neutral gear, AFR displayed on the gauge will … The resulting value is the gear ratio for the entire system. … The gear ratio is determined by the final drive gears that are installed in your vehicle. The above method is used to calculate the ratio in each set. The output shaft going to either the front or rear differential contains a pinion gear. This is good for torque but not speed. We should define the term "gear ratio" right from the start. You do not want go too low in an effort to increase power to the wheels and/or relieve stress in the rest of the drivetrain. Using paper works best when you have a larger set of gears. Part 3 of 5: Determining an approximation of your car’s gear ratio. Gearing changes are mainly done to make a vehicle faster, or on the scale/crawling side, crawl better. Definition: gear ratio n. The ratio of the speed of rotation of the powered gear of a gear train to that of the final or driven gear. On an electric car, the Pinion is changed by loosening the screws to the motor (or, in some cases, removing it from the car) and then removing the Pinion. The good news is that setting the gear mesh of your RC car or vehicle can be done quite easily. The spur gear is the larger gear that the pinion turns. Gear Ratio’s can be difficult to understand, but with a fairly brief explanation I will attempt to make this often misunderstood equation VERY easy to grasp. _____ Once the face of the teeth are checked, turn the pinion gear to it’s side and check the side of the teeth. Pinion Gear. If you happen to set the gear mesh too tight, you may hear a grinding noise or in general excessive noise coming from the meshed gears.