Overview
ISO 98:2001 is an International Standard for textile machinery and accessories, specifically covering the main dimensions of synthetic coverings for ready‑for‑use top rollers used in spinning preparatory and spinning machinery. The standard defines dimensional series, designation rules and execution types so manufacturers, users and suppliers can ensure interchangeability, correct fit and consistent performance of top‑roller coverings in draw‑frames, combers, spinning and roving frames.
Key Topics
- Scope and applicability
- Applies to synthetic (ready‑for‑use) coverings for top rollers in spinning preparatory and spinning machinery.
- Symbols and parameters
- d (bare roller diameter), d (roller diameter with covering, finished ground), b (covering width), F (saddle force), execution types B, C, D.
- Dimensional tables
- Single‑boss top rollers: bare diameters include 16, 18, 19, 23, 26, 28, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 mm. Covered diameters include 25, 28, 32, 34, 36, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 mm. Covering widths b include 80, 90, 100, 110, 125, 140, 160, 180, 200, 220, 250, 280, 315, 355, 400, 450 mm. (Notes specify increments for larger sizes.)
- Twin‑boss top rollers: bare diameters include 19, 23, 25, 28, 30, 35, 40, 45, 50, 55, 60 mm; covered diameters 25–80 mm (listed series); widths b from 25 up to 60 mm (with increments noted for larger widths).
- Designation format
- The covering designation includes the standard reference, d1, d2, b (in mm), Shore A hardness, execution type (B/C/D) and saddle force F (in decanewtons).
- Example format: ISO 98 – d1 / d2 / b – Shore A – Execution – F (e.g., a 28/40/160 mm covering, Shore A 80, type B, F = 40 daN).
- Execution types
- B: rectangular sides, C: beveled sides, D: rounded sides. Manufacturer may supply any execution if buyer does not specify.
Applications
- Ensures interchangeability of top‑roller coverings between machinery makes and spare‑part suppliers.
- Used by:
- Textile machinery manufacturers (design and parts lists)
- Spare‑parts suppliers and aftermarket producers (dimensioning and marking)
- Textile mill maintenance and procurement (replacement and specification)
- Quality control and engineering teams (tolerance checks, compatibility)
- Practical benefits: simplifies procurement, reduces downtime, improves consistency in yarn processing where top‑roller geometry affects drafting, contact pressure and yarn quality.
Related standards
- Prepared by ISO/TC 72 (Textile machinery). Users typically reference ISO 98 alongside machine‑specific standards and other textile machinery dimensional or material standards to ensure full compatibility.