Stainless Steel Pinion Coupler Sleeve Adapter Converts 3.175mm To 5mm Pinions For RC Motors 3650 550 540 12mm Long Wear Resistant Includes 3 Sleeves And Allen Key For Easy Gear Ratio Changes

Stainless Pinion Adapter: 3.175mm to 5mm Sleeves, 12mm
✔️ 3 sleeves incl., 3.175mm to 5mm adapter, stainless steel, 12.2mm

This stainless steel pinion coupler sleeve adapter lets you convert 3.175 mm (1/8 in) pinion apertures to 5 mm (0.196 in) with a compact 12.2 mm length. It's ideal for RC car setups using motors like 3650, 550, 540, enabling easy gear ratio changes and compatibility across parts. Made from wear-resistant stainless steel for longevity.

✅ Inner diameter: 3.175 mm (0.125 in)
✅ Outer diameter: 5.0 mm (0.196 in)
✅ Length: 12.2 mm (0.48 in)
✅ Material: stainless steel with wear resistance
✅ Includes: 3 sleeves, L Allen key, 10x M4 set screws

💡 What is a pinion sleeve adapter used for in RC motor gear trains? This handy accessory helps dial in gear ratios by adapting pinion bore sizes.

This handy accessory helps dial in gear ratios by adapting pinion bore sizes. - handy for dialing gear ratios in RC gearing systems
- compatible with 3.175 mm to 5 mm pinion sleeves and adapters
- reduces the need to buy new components when upgrading motors