33-XT-BD-AE1 Rotor Complete
Narrow T-profile rotor complete for the fine end of the count range (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.
33-XT-BD-AE1 — Complete Specifications
All measurements in millimetres. Every rotor complete assembly is 100% dynamically balanced on our own balancing line before shipment.
Why XT Groove for Fine Yarn
Narrow-profile geometry is the fine-count answer. The T groove concentrates deposition into a compact zone so the fibre bundle is twisted evenly at the top of the count range. Bearing fit is unchanged across the group — only the groove profile and cup size distinguish the models.
XT Groove — Applicable Yarn Count Range
Aim this groove at the fine half of the range. Coarse counts in the Ne 3–16 band need the wider GL profile. Groove and cup size are confirmed together when the order is placed.
XT Groove — A Tight Zone for a Thin Ribbon
Narrow grooves trade operating width for control, and the T profile makes that trade deliberately: inside Ne 16–40 the tighter zone produces steadier fibre separation and a yarn that holds its appearance through downstream processing. The profile is intended to be run at the fine end of the schedule and swapped out at the coarse end.
Thin-Place Reduction
Control of the deposition zone directly limits the thin places that downgrade fine knitting yarn.
Smooth Yarn Surface
Even fibre distribution at insertion gives a smoother yarn face — the property that decides how fine knits look and feel.
Tuned to Ne 16–40
A narrow zone matched to thin fibre ribbons keeps collection stable across the whole fine-count band.
Better Evenness at Fine Counts
Tighter deposition control is what holds thin and thick places down when the yarn gets fine — the effect buyers notice first.
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. 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 33-XT-BD-AE1?
Machine fit is set by the bearing: R60-AE1 here, for the Rieter R60 platform. Other Rieter generations use different rotor groups.
What to Spin with 33-XT-BD-AE1
Application guidance for 33-XT-BD-AE1 on the fully automatic side of the Rieter range; counts and fibre types follow the XT groove specification.
✓ Fully automatic platforms running fine-count delivery
✓ Fine and medium-fine counts, Ne 16–40
✓ Cotton, viscose and modal at the fine end
◇ Abrasive or recycled fibre — DN diamond coating
◇ Medium counts below Ne 16 — G standard or U general purpose
◇ Blends and speciality fibres — S groove
→ G: Standard (Ne 16–40)
→ T: Narrow (Ne 16–40) — this model
→ TT: Extra narrow (Ne 16–40)
→ S: Special (Ne 16–40)
→ U: General purpose (Ne 10–30)
→ See all 7 Rieter R60 rotor models →
33-XT-BD-AE1 — 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 33-XT-BD-AE1 compatible with my Rieter R60 machine?
What does the model code 33-XT-BD-AE1 mean?
What yarn counts does the XT groove suit?
What do the letters BD mean in the model code 33-XT-BD-AE1?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order 33-XT-BD-AE1 Rotors
Pre-filled: 33-XT-BD-AE1 · Rieter R60 · boronized base + diamond coating
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