C533/T-D Rotor Complete
Narrow T-profile rotor complete for the fine end of the count range (Ne 16–40) on the Rieter R923 and R35 semi-automatic platform. D — diamond coating over the rotor substrate. T013 bearing rated to 110,000 rpm with a recommended ceiling of ≤ 105,000 rpm — dimensionally identical to the original, at 40–60% below OEM price.
C533/T-D — Complete Specifications
All measurements in millimetres. Every rotor complete assembly is 100% dynamically balanced on our own balancing line before shipment.
Why T Groove for Fine Yarn
T-profile rotors run a narrow groove for a reason: at fine counts the fibre ribbon is thin, and a tighter deposition zone keeps it under control through twist insertion. Because the count band is not published, the selection is checked against your fibre and target count before quoting.
T Groove — Applicable Yarn Count Range
Best kept inside Ne 16–40. If the schedule runs coarser than Ne 16, the U or GL groove will run more comfortably. Send us the fibre type and target count with the enquiry and we confirm the pairing.
T Groove — Where Fine Counts Are Decided
At fine counts every extra millimetre of groove width costs yarn quality. The narrow T profile keeps the fibre ribbon tight against the groove wall, giving uniform twist propagation and a smoother yarn surface. Evenness, not operating width, is what a narrow profile is bought for.
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.
Lower Break Rate
Smoother twist propagation at fine counts cuts the tension peaks that break ends at high rotor speeds.
What D 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. Diamond top layer (HV 1000-1200) with a friction coefficient of 0.05–0.1, which reduces fibre damage at the groove face. The rotor is dimensionally identical to the original part, so no machine modification is needed.
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. This code does not carry the B step; it is the -BD- variant that pairs the diamond layer with the boronized base.
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 C533/T-D?
This rotor runs the T013 bearing, shared by the Rieter R923 and R35 semi-automatic machines. Models in the group differ by groove and rotor size, not by bearing fit.
What to Spin with C533/T-D
How this rotor is applied on Rieter R923 and R35 machines, with the T groove’s count window where one is published.
✓ Fine and medium-fine counts, Ne 16–40
✓ Cotton, viscose and modal at the fine end
✓ Fine knitting and shirting-type yarns
◇ Coarse counts Ne 3–16 — GL groove
◇ Extremely fine compact counts — XTC extra-narrow groove
◇ Abrasive or recycled fibre — DN diamond coating
→ GL: Large (Ne 3–16)
→ G: Standard (Ne 16–40)
→ T: Narrow (Ne 16–40) — this model
→ TT: Extra narrow (Ne 16–40)
→ S: Special (Ne 16–40)
→ See all 9 Rieter R923 and R35 rotor models →
C533/T-D — 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 C533/T-D compatible with my Rieter R923 and R35 machine?
What does the model code C533/T-D mean?
What yarn counts does the T groove suit?
What do the letters BD mean in the model code C533/T-D?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order C533/T-D Rotors
Pre-filled: C533/T-D · Rieter R923 / R35 · diamond coating
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