IRT812 Metric Single Inner Ring for Shell-Type Needle Roller Bearings, 8 mm ID x 12 mm OD x 12.5 mm Width, High-Carbon Steel, Fits TA1212Z TLA1212Z YT1212

Single IRT812 metric inner ring for needle bearings
✔️ 8 mm ID, 12 mm OD, 12.5 mm width; shell-type; fits TA1212Z

This single metric inner ring (IRT812) is a tapered-bore race for shell-type needle roller bearings made from high-carbon steel. It’s typically used in transmissions, gearboxes, linear slide units and other industrial assemblies where a hard raceway is required.

✅ Model: IRT812 (IRT Metric Series)
✅ Inner diameter: 8 mm, tapered bore
✅ Outer diameter: 12 mm
✅ Width: 12,5 mm
✅ Material: high-carbon steel
✅ Fits: TA1212Z, TLA1212Z and YT1212 shell assemblies
✅ Pack: single inner ring; SKU 860655

💡 What is an inner ring for a needle roller bearing used for in industrial assemblies? An inner ring provides a hardened raceway for needle rollers when shafts can't be finished to bearing race tolerances. Short intro: Here are common reasons you’d pick an inner ring for your setup: - Gives a reliable, hardened running surface in transmissions, gearboxes and power tools to boost load capacity and life. - Lets you use tapered bore options and shell-type housings, handy for linear slide units and sealed ball bearing housings. - Keeps shaft machining simple while allowing upgrades like ceramic rollers or sealed ball bearing replacements.