uxcell 48P 7075 Aluminum Pinion Motor Gear Set, 38T, 39T, 40T, for 5mm RC Motor Shaft, 48-Pitch Gear for RC Cars, Includes Hex Wrench, 3 Pieces

1. Diameter Pitch: 48DP, Gear Aperture: 5mm, Gear Height: 9mm, Number of Teeth: 38T, 39T, 40T 2. 48P (48DP) is the pitch of each tooth on the pinion gear, and 38T, 39T, 40T are the number of teeth on the pinion gear. Make sure the pitch of the spur gear and pinion gear are the same. Otherwise, the teeth will not mesh. 3. This RC car pinion gear set is made of high-quality 7075 aluminum, making it durable and reusable, allowing you to enjoy fun RC racing. 4. Excellent machining results in smooth rotation with less roughness and noise compared to other pinions. 5. Speeds vary depending on the gear ratio. We offer pinion gears with various tooth sizes to expand your gear ratio options. 6. This pinion gear set is made of hardened steel and can be used with steel spur gears. Do not use with plastic or aluminum spur gears. You can start with the smallest teeth first. Next, upgrade to larger teeth and periodically check the motor temperature while driving. Ultimately, you'll be able to control faster speeds while avoiding potential risks. 7. Package Includes: 3 x 48dp Pinion Gears, 3 x Grub Screws, 1 x Hex Wrench Size - 48P (48DP) is the pitch of each tooth on the pinion gear, and 38T, 39T, or 40T is the number of teeth on the pinion gear. Make sure the pitch of the spur gear and pinion gear are the same. Otherwise, the teeth will not mesh. Material - The RC car pinion gear set is made of high-quality 7075 aluminum, making it durable and reusable, allowing you to enjoy fun RC racing hours. Features - Excellent processing ensures smooth rotation with less roughness and noise compared to other pinions. Applications - Speeds vary depending on the gear ratio. We offer pinion gears with various tooth sizes to expand your gear ratio options. Tip: This pinion gear set is made from hardened steel and can be used with steel spur gears. Do not use with plastic or aluminum spur gears. You can start with the smallest teeth first. Then upgrade to larger teeth, periodically checking the motor temperature while operating. Eventually, you'll be able to control high speeds while avoiding potential risks.