31-XGM-BD-EC1 Rotor Complete
Standard G-groove rotor complete for mainstream cotton spinning (Ne 16–40) on the Rieter R60 fully automatic platform. Boronized (boron-steel) base with a diamond working face. Every assembly is dynamically balanced and vibration-checked before shipment, at 40–60% below the OEM part price.
31-XGM-BD-EC1 — Complete Specifications
All measurements in millimetres. Every rotor complete assembly is 100% dynamically balanced on our own balancing line before shipment.
Why XGM Groove for Everyday Cotton Spinning
G is the standard-profile groove: neither as tight as the narrow T family nor as wide as the general-purpose U, it is sized to the fibre volume of mainstream cotton counts (Ne 16–40). Rotors in this group share that groove and differ by cup diameter, so the groove can stay constant while the count moves.
XGM Groove — Applicable Yarn Count Range
The G profile covers the mainstream of the range. Blends and speciality fibres are better served by the S groove, and the T family takes over at the fine end. Mills usually run a sample first to verify the groove on the machine before a bulk order.
XGM Groove — Mainstream Cotton, Held Steady
Because the groove is neither over-tight nor over-wide, the G rotor absorbs the natural variation in cotton fineness and maturity that arrives delivery to delivery. That makes it the low-surprise choice for a steady Ne 16–40 schedule. The profile is deliberately neutral: it tolerates lot-to-lot variation instead of relying on a tight window.
Diameter Choice, Same Groove
Group members share the groove and differ in cup diameter, so counts can shift by changing rotor size without changing spinning-box setup.
Cost-Effective Standard
The G rotor is the workhorse of the range — a straightforward coated cup for mills where cost per kilogram of yarn and steady running both matter.
Matched to Ne 16–40
The groove volume is sized for the fibre mass of 16–40 Ne cotton, so fibre collection stays in the stable part of the curve across the whole band.
Even Yarn, Run to Run
A medium-width deposition zone holds the fibre ring steady between doffs, which is what keeps count and appearance consistent in routine production.
What BD Means: Base and Working Surface
The trailing letters of the model code are two independent codes, not one word: B is the substrate, D is the working surface. This code is a two-layer build: B puts a boronized (boron-steel) substrate under the film, D is the diamond top layer. The base is what stops fibre impact from deforming the rotor and cracking the coating. Standard lead time on coated rotors is 7–15 days, with urgent orders on request.
B = boronized (boron-steel) substrate. A diamond film is only microns thick, so the steel underneath decides whether it survives: a soft substrate deforms under fibre and grit impact and the film cracks and spalls off. The boronized base is the hardening step that keeps the diamond layer intact.
D = diamond top layer, grown on the prepared substrate as a micron-scale film. It takes the fibre and grit contact directly, which is where the wear resistance, the friction coefficient of 0.05–0.1 and the anti-stick behaviour come from that hold the groove profile over long runs. Diamond coating technology of US origin, applied on JSM’s own treatment line.
Which Rieter Machines Use 31-XGM-BD-EC1?
The R60-EC1 bearing locks this rotor to the Rieter R60 platform. Rotors from a different bearing group will not interchange, however similar the cup looks.
What to Spin with 31-XGM-BD-EC1
Typical operating profile for the XGM groove on the Rieter R60 fully automatic platform. Groove count windows follow the catalogue data.
✓ Long production orders that need low-surprise running
✓ Cotton and cotton-rich blends, medium to fine counts
✓ Ne 16–40 — the mainstream of a cotton spinning schedule
◇ Fine counts at the top of the band — XT / XTC narrow family
◇ Blends and speciality fibres — S groove
◇ Medium–coarse counts Ne 10–30 — U groove
→ U: General purpose (Ne 10–30)
→ GL: Large (Ne 3–16)
→ G: Standard (Ne 16–40) — this model
→ T: Narrow (Ne 16–40)
→ TT: Extra narrow (Ne 16–40)
→ See all 4 Rieter R60 rotor models →
31-XGM-BD-EC1 — Frequently Asked Questions
Answers to the questions buyers ask most often about this rotor. If yours is not listed, send it with your machine model and current rotor code — we reply within 24 hours.
Is 31-XGM-BD-EC1 compatible with my Rieter R60 machine?
What does the model code 31-XGM-BD-EC1 mean?
What yarn counts does the XGM groove suit?
What do the letters BD mean in the model code 31-XGM-BD-EC1?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order 31-XGM-BD-EC1 Rotors
Pre-filled: 31-XGM-BD-EC1 · Rieter R60 · boronized base + diamond coating
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