36-XTC-BD-AE Rotor Complete
Extra-narrow rotor complete for compact, appearance-critical fine yarns (Ne 16–40) on the Rieter R40 fully automatic platform. BD build — boronized base under a diamond top layer. 100% dynamically balanced and dimensionally identical to the original — at 40–60% below OEM price.
36-XTC-BD-AE — 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
The XTC extra-narrow groove is the tightest profile in the range: a compact deposition zone for the finest and most exacting counts inside the Ne 16–40 band. Rotors in this group share that groove and differ by cup diameter, so the groove can stay constant while the count moves.
XTC Groove — Applicable Yarn Count Range
Suited to compact fine counts. If the schedule runs medium or coarser, the standard G or U groove gives more operating width. Groove and cup size are confirmed together when the order is placed.
XTC Groove — The Tightest Fibre Zone
The extra-narrow XTC profile presses the fibre ribbon into a compact zone, giving the closest control of fibre placement available in this catalogue. That translates into cleaner yarn surfaces and fewer appearance faults — the reason compact fine yarns are run on extra-narrow rotors rather than standard profiles. The tighter the groove, the more the profile depends on consistent raw material and a steady count.
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.
Fewer Appearance Faults
The narrow zone suppresses the thin and thick places that show up immediately in fine knitted fabric.
Smooth Yarn Face
Precise fibre placement at insertion produces the smooth surface compact yarns are bought for.
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. Every assembly is 100% dynamically balanced before it leaves the balancing line.
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 36-XTC-BD-AE?
The R40-AE bearing locks this rotor to the Rieter R40 platform. Rotors from a different bearing group will not interchange, however similar the cup looks.
What to Spin with 36-XTC-BD-AE
Typical operating profile for the XTC groove on the Rieter R40 fully automatic platform. Groove count windows follow the catalogue data.
✓ Fine counts at the top of the Ne 16–40 band
✓ Cotton, viscose and modal at fine counts
✓ Fine knitting yarns where appearance is the selling point
◇ Coarse counts Ne 3–16 — GL groove
◇ High-impurity or abrasive fibre — DN diamond coating
◇ Medium counts Ne 16–30 — G standard or U general purpose
→ See all 9 Rieter R40 rotor models →
36-XTC-BD-AE — 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 36-XTC-BD-AE compatible with my Rieter R40 machine?
What does the model code 36-XTC-BD-AE mean?
What yarn counts does the XTC groove suit?
What do the letters BD mean in the model code 36-XTC-BD-AE?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order 36-XTC-BD-AE Rotors
Pre-filled: 36-XTC-BD-AE · Rieter R40 · boronized base + diamond coating
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