40-XTC-BD-EC1 Rotor Complete
Extra-narrow XTC rotor complete for closely controlled fine yarns (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.
40-XTC-BD-EC1 — Complete Specifications
All measurements in millimetres. Every rotor complete assembly is 100% dynamically balanced on our own balancing line before shipment.
Why XTC Groove for Compact Fine Yarn
Extra-narrow geometry is for mills that judge a rotor on yarn appearance: XTC holds the deposition zone tight so fibre placement stays exact at the top of the count range. Bearing fit is unchanged across the group — only the groove profile and cup size distinguish the models.
XTC Groove — Applicable Yarn Count Range
The extra-narrow profile is at its best above Ne 20. Medium counts are better served by the G groove. Mills usually run a sample first to verify the groove on the machine before a bulk order.
XTC Groove — Precision at the Fine End
Because the deposition zone is so tight, the XTC rotor holds a stable fibre ring even when the raw material varies. Mills running compact fine counts use it to keep yarn appearance predictable order after order. Extra-narrow rotors reward mills whose count and fibre supply are already under control.
Stable on Variable Raw Material
A tight, clean cross-section keeps the fibre ring steady even when the cotton lot changes.
Best Above Ne 20
The tighter the zone, the finer the count it suits — this profile is aimed at the top of the Ne 16–40 band.
Extra-Narrow Zone
The tightest groove in the range gives the closest control of where fibres land during deposition.
Compact Yarn Appearance
Tight placement control is what makes compact-style fine yarns look uniform doff after doff.
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. The diamond layer is only microns thick, so the boronized base underneath is what carries the load. That pairing is why this rotor holds its profile on long runs. 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 40-XTC-BD-EC1?
Machine fit is set by the bearing: R60-EC1 here, for the Rieter R60 platform. Other Rieter generations use different rotor groups.
What to Spin with 40-XTC-BD-EC1
Application guidance for 40-XTC-BD-EC1 on the fully automatic side of the Rieter range; counts and fibre types follow the XTC groove specification.
✓ Work where standard profiles are not tight enough
✓ Compact and appearance-critical fine yarns
✓ Fine counts at the top of the Ne 16–40 band
◇ Medium counts Ne 16–30 — G standard or U general purpose
◇ Less exacting fine counts — XT / T narrow groove
◇ Blends and speciality fibres — S groove
→ See all 4 Rieter R60 rotor models →
40-XTC-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 40-XTC-BD-EC1 compatible with my Rieter R60 machine?
What does the model code 40-XTC-BD-EC1 mean?
What yarn counts does the XTC groove suit?
What do the letters BD mean in the model code 40-XTC-BD-EC1?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order 40-XTC-BD-EC1 Rotors
Pre-filled: 40-XTC-BD-EC1 · Rieter R60 · boronized base + diamond coating
Tell us your quantity and we respond with pricing, lead time and freight options within 24 hours. Sample orders welcome.
No spam · Your information stays private · Leo Wang replies personally