Two-Plane Rotor Balancing Explained | Influence Coefficients & ISO Standards | Part 2

# Two-Plane Rotor Balancing Explained | Influence Coefficients, Balancing Machines & ISO Standards | Part 2 How do engineers balance long industrial rotors? Why does adding a correction weight at one end affect vibration at the other end? And how do engineers calculate acceptable residual unbalance using ISO balancing standards? Welcome to **Engineering Decoded!** In Part 2 of our Rotor Balancing series, we explore advanced dynamic balancing techniques used in industrial fans, centrifugal pumps, compressors, turbines and other rotating machinery. Learn how **two-plane balancing, vibration analysis, phase measurements and influence coefficients** help engineers determine correction weights and angular positions to reduce rotor vibration. 🔧 **What You'll Learn in This Video:** ✅ Why long rotors require two-plane balancing ✅ Static unbalance vs couple unbalance ✅ Two-plane balancing procedure explained step by step ✅ Understanding cross-effects between balancing planes ✅ Influence coefficient method and 2×2 matrix calculations ✅ How balancing analyzers calculate correction weights ✅ Reusing influence coefficients to reduce trial runs ✅ Field balancing vs workshop balancing ✅ Hard-bearing vs soft-bearing balancing machines ✅ High-speed rotor balancing machines ✅ ISO 21940 balancing quality grades ✅ G 2.5, G 6.3 and G 16 balancing grades explained ✅ Permissible residual unbalance calculation ✅ Common rotor balancing mistakes and safety precautions 📐 **Practical Engineering Calculation — ISO G 2.5** In this video, we demonstrate how to calculate permissible residual unbalance for an industrial rotor. **Example data:** - Rotor mass: 400 kg - Operating speed: 10,000 RPM - Balancing quality grade: G 2.5 - Correction radius: 50 mm **Calculated results:** - Angular velocity: 1,047 rad/s - Permissible specific residual unbalance: 2.39 micrometres - Permissible total residual unbalance: approximately 955 g·mm - Illustrative equal allocation: approximately 477.5 g·mm per correction plane Understand how engineers use these calculations to evaluate rotor balancing quality and improve machinery reliability. 🏭 **Industrial Applications** The balancing techniques explained in this video are relevant to: - Industrial centrifugal fans and blowers - Steam and gas turbines - Centrifugal pumps - Industrial compressors - Electric motor rotors - Long rotating shafts - High-speed rotating equipment 👷 **Who Should Watch?** This video is especially useful for mechanical engineers, maintenance engineers, reliability engineers, vibration analysts, rotating equipment technicians, condition monitoring professionals and mechanical engineering students. 🎬 **Watch Part 1 — Rotor Balancing Fundamentals** In Part 1, we explained centrifugal force, heavy spots, high spots, phase angles, vibration measurements and single-plane balancing using the trial-weight vector method. ▶️ **Part 1 Video link : https://youtu.be/xxVQM9F5D7Q 📚 **Engineering Topics Covered:** Rotor Dynamics | Dynamic Balancing | Two-Plane Balancing | Vibration Analysis | Influence Coefficients | Predictive Maintenance | ISO Balancing Standards | Rotating Equipment Reliability 🔔 **Subscribe to Engineering Decoded** Discover how industrial machinery works through practical explanations, engineering calculations, real-world applications and technical documentaries. **Engineering Decoded — Understanding the Engineering Behind Industry.** 👍 Like the video if you found it useful. 💬 Comment below: Which balancing method do you use in your plant — single-plane balancing or two-plane balancing? 🔗 Share this video with mechanical engineers and maintenance professionals. #RotorBalancing #TwoPlaneBalancing #DynamicBalancing #VibrationAnalysis #InfluenceCoefficients #MechanicalEngineering #PredictiveMaintenance #RotatingEquipment #ISO21940 #EngineeringDecoded