A&I Navel R4 is a false-twist element for open-end rotor spinning. The navel sits at the rotor outlet and imparts the false twist that stabilises the spun yarn as it is drawn off; the bore geometry — entry diameter D1 and throat diameter D2 — together with the surface finish influence yarn evenness, hairiness and running stability.

Catalog variants:

Type	Reference	Speed (rpm)	Bore D1 (mm)	Bore D2 (mm)	Compatible machines
R4	03583186	40,000	14	4	BD200RC / RCE / S
R4	03653201	60,000	12	4	BD200 / RCE / S

Confirm the exact variant by machine model and current part number — send your RFQ for matching. Pricing on request.