S 540 BD Rotor Complete
S groove rotor with BD boronized coating for blended yarn spinning (Ne 16–40) on Autocoro 360 / ACO 480 series. 100% dynamic-balanced. Custom profiles available from our in-house production line.
S 540 BD — Complete Specifications
All measurements in millimetres. Each rotor undergoes 100% dynamic balance testing before shipment.
Why S Groove for Blended Yarns
The S groove is the industry-standard profile for blended yarn spinning in the Ne 16–40 range.
S Groove — Applicable Yarn Count Range
Optimized for medium to fine blend counts. For 100% coarse cotton (Ne 3–16), consider the GT groove.
S Groove — Precision Fibre Control for Blends
The S groove geometry creates a controlled deposition zone inside the rotor, ensuring blended fibres are uniformly distributed and twisted. This translates to higher yarn evenness (lower CV%) and fewer thin/thick places — critical for CVC, PC and viscose blend applications.
Optimized for Ne 16–40 Blends
The S groove’s geometry is calibrated for cotton-rich and synthetic blends, delivering stable fibre separation and consistent yarn formation across the full Ne 16–40 range.
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 and improving machine efficiency on SE11/SE12 platforms.
Self-Cleaning Geometry
The groove’s parabolic cross-section prevents dust and lint accumulation in blend spinning — a root cause of periodic faults and moiré patterns in long-run production.
BD Boronized vs. DN Diamond Coating
Both coatings available from our in-house treatment line. Choose based on fibre type and speed requirements.
Thermochemical diffusion process forms a hard boride layer (FeB/Fe₂B) on the substrate. Excellent wear resistance at a competitive price. Ideal for standard cotton production where cost-per-kg is the 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 S 540 BD?
Bearing Series 5 rotors fit SE11 and SE12 generation Autocoro machines. Other generations require different spec numbers.
What to Spin with S 540 BD
Based on field data from spinning mills worldwide using SE11/SE12 machines.
✓ Ne 30–40 viscose & modal blends
✓ Denim & twill warp yarns
✓ Knitting blend yarns
✓ Recycled cotton-rich blends
◇ Modal & lyocell blends
◇ Polyester-rich blends (P/C)
◇ Mélange & slub blend yarns
→ S groove: Medium to fine blends (Ne 16–40)
→ T groove: Medium to fine (Ne 16–40)
→ K groove: Fine counts only (Ne 30–40)
→ See T 540 BD →
Order S 540 BD Rotors
Pre-filled: S 540 BD · Schlafhorst Autocoro SE11/SE12 · BD Boronized
Tell us your quantity and we’ll respond with pricing and lead time within 24 hours. Sample orders welcome.