35-D III-D Rotor Complete
Application-matched D III rotor complete for counts confirmed per order on the Rieter R1, R20, R40 and R60 fully automatic platform. Diamond top layer on the prepared substrate. Every assembly is dynamically balanced and vibration-checked before shipment, at 40–60% below the OEM part price.
35-D III-D — Complete Specifications
All measurements in millimetres. Every rotor complete assembly is 100% dynamically balanced on our own balancing line before shipment.
Why D III Groove for Application-Specific Spinning
D III is a code outside the standard count-band families: no fixed Ne window is published for it in our catalogue data, so the rotor is specified against the application. The group is stocked across several cup sizes, which lets a mill shift counts without changing the spinning-box setup.
D III Groove — Yarn Count Range
The count band is confirmed per order. Include your target Ne, fibre type and spinning position with the enquiry. Send us the fibre type and target count with the enquiry and we confirm the pairing.
D III Groove — Application-Matched Rotor
D III rotors run on the R20 Twin Disc bearing, which is shared by the Rieter R1, R20, R40 and R60 series, so machine compatibility is unambiguous. The count side is not published as a fixed band: send the fibre type and target Ne and our engineers confirm the correct pairing before the order is released. Send the fibre, the target count and the spinning position and the selection is confirmed before quoting.
Engineer-Confirmed Selection
Groove, cup size and coating are confirmed together before the order is released.
No Trial-and-Error at the Machine
Getting the pairing right before shipment avoids change-overs that cost production time.
Shared Bearing, Four Machine Series
The R20 Twin Disc bearing serves the Rieter R1, R20, R40 and R60 series, so one rotor covers all four generations.
Cup Size From the Code
The leading number gives the cup diameter in millimetres, so the rotor size is unambiguous.
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 35-D III-D?
Bearing fit comes first — here the R20 Twin Disc bearing, common to the Rieter R1, R20, R40 and R60 series. A rotor from another bearing group will not seat correctly, however similar the cup looks.
What to Spin with 35-D III-D
How this rotor is normally applied on Rieter R1, R20, R40 and R60 machines, with the D III groove’s published count window where the catalogue documents one.
✓ Replacing a rotor at a known position
✓ Mills needing the count confirmed before ordering
✓ Buyers standardising on the R20 Twin Disc bearing
◇ Blends and speciality fibres — S groove
◇ Coarse counts Ne 3–16 — GL groove
◇ Abrasive or high-impurity fibre — DN diamond coating
→ T: Narrow (Ne 16–40)
→ TT: Extra narrow (Ne 16–40)
→ S: Special (Ne 16–40)
→ U: General purpose (Ne 10–30)
→ GL: Large (Ne 3–16)
→ G: Standard (Ne 16–40)
→ See all 6 Rieter R1, R20, R40 and R60 rotor models →
35-D III-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 35-D III-D compatible with my Rieter R1, R20, R40 and R60 machine?
What does the model code 35-D III-D mean?
What yarn counts does the D III groove suit?
What do the letters BD mean in the model code 35-D III-D?
How much does an OEM-equivalent rotor save versus the original?
Can I order the rotor spindle or rotor cup separately?
Order 35-D III-D Rotors
Pre-filled: 35-D III-D · Rieter R1 / R20 / R40 / R60 · diamond coating
Tell us your quantity and we respond with pricing, lead time and freight options within 24 hours. Sample orders welcome.
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