G 331 BD Rotor Complete
G Groove rotor with BD boronized coating for 100% cotton and cotton-dominant blends on Autocoro 312 / 360 series. Full dynamic balancing. In-house manufacturing with custom groove profiles available.
G 331 BD — Complete Specifications
All measurements in millimetres. Each rotor undergoes 100% dynamic balance testing before shipment.
Why G Groove for This Application
The G Groove profile is engineered for 100% cotton and cotton-dominant blends.
G Groove — Precision Fibre Control for Target Yarn
The G Groove geometry creates a controlled deposition zone inside the rotor, ensuring 100% cotton and cotton-dominant blends are uniformly distributed and twisted. This translates to higher yarn evenness (lower CV%) and fewer thin/thick places compared to generic groove profiles.
Superior Fibre Opening
The G groove’s wider entry angle ensures complete fibre separation before twist insertion, reducing neps and improving yarn appearance at Ne 6–30.
Consistent Yarn Evenness
Stable fibre deposition zone produces CV% values consistently below Uster 25% benchmarks, critical for downstream knitting and weaving quality.
Reduced End Breakage
Optimized twist propagation path reduces spinning tension peaks, lowering end-break rates by 15–25% compared to non-optimized groove designs at equivalent speeds.
Self-Cleaning Geometry
The groove’s parabolic cross-section prevents micro-dust accumulation — a common root cause of moiré and periodic faults in continuous long-run production.
BD Boronized vs. DN Diamond Coating
Choose the right coating for your production environment. Both available from our in-house treatment line.
Thermochemical diffusion process forms a hard boride layer (FeB/Fe₂B) on the substrate. Excellent wear resistance at a competitive price. Ideal for standard cotton and cotton-blend production where cost-per-kg is a priority.
CVD diamond-like carbon coating delivering extreme surface hardness. Recommended for abrasive fibres (recycled cotton, coloured cotton, viscose blends), high-speed production, and mills targeting maximum uptime and longest service intervals.
Which Schlafhorst Machines Use G 331 BD?
Bearing Series 3 rotors fit SE9 / SE10 generation Autocoro machines (Autocoro 312 / 360). If your machine is from a different generation, see the equivalent groove-type models on our catalog page.
What to Spin with G 331 BD
Production recommendations based on field data from spinning mills worldwide.
✓ Ne 10–30 combed cotton
✓ Denim & bottom-weight yarns
✓ Terry towel pile yarns
✓ Open-end knitting yarns
◇ PC blends (polyester/cotton)
◇ Regenerated cotton blends
◇ Cotton-rich mélange
→ 100% viscose / modal
→ Microfibre blends
→ Compact feel requirements
→ See T 533 BD →
Order G 331 BD Rotors
Pre-filled: G 331 BD · Schlafhorst Autocoro SE9 / SE10 · BD Boronized
Tell us your quantity and we’ll respond with pricing and lead time within 24 hours. Sample orders welcome.