ISO 8239:1987 PDF

Name: ISO 8239:1987 — Sewing machines needles — Fitting dimensions — Tolerances and combinations
SKU: ISO 8239:1987
Price: 25 EUR
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Sewing machines needles — Fitting dimensions — Tolerances and combinations

Название (английский):

ISO 8239:1987

Sewing machines needles — Fitting dimensions — Tolerances and combinations

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 3 декабря 1987 г.
Издание:: ISO IS 8239 edition 1 version 1
ICS:: 61.080

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Описание (английский):

ISO 8239 specifies the fitting dimensions of needles and needle holders. It defines general terms for sewing machine needles and specifies the tolerances for their fit in the needle holder. In addition to the rangers of dimensions for the nominal shank diameter and the length from butt to eye, ISO 8239 also indicates the preferred combinations of these two dimensions. In order to ensure the interchangeability and to reduce the variety of needles these should serve as a guide when designing new sewing machines and/or sewing machine needles.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 8239:1987 - Sewing machine needles - Fitting dimensions - Tolerances and combinations defines the fitting dimensions, general terms and tolerances for sewing machine needles and needle holders. The standard establishes ranges for the nominal shank (heel) diameter and the distance from the butt to the eye and gives recommended combinations of these two dimensions to promote interchangeability and reduce unnecessary variety in needles and needle-holder designs.

Key topics and technical requirements

Terminology and designation

Defines key terms such as diameter of the heel (a), diameter of the shank/shaft (d) and distance from butt to eye (I).
Explains the metric needle designation (Nm): Nm = d × 100 (for example, Nm 90 = 0.9 mm).

Fitting dimensions and tolerance zones

Specifies tolerance regimes for needle heels and shanks to ensure correct fit in needle holders.
For a < 1 mm, a prismatic fixation (prism) is foreseen and tolerances for the shaft diameter (d) are the primary concern.
For a > 1 mm, fixation by needle-bar holes, prisms or similar means is foreseen; tolerance zones referenced include E9 (holes) and h9 (shafts) as per ISO 286.

Recommended combinations

Provides recommended combinations of heel diameter (a) and butt-to-eye length (I) to be used as a design guide for new needles and sewing machines.

Reference to ISO systems

Uses ISO tolerance systems (ISO 206 and ISO 286) for defining fits and tolerance zones.

Applications and who uses this standard

Needle manufacturers - design and produce needles with standardised shank diameters and butt-to-eye lengths to ensure interchangeability.

Sewing machine designers and OEMs - specify needle-holder geometry and tolerances to accept standard needles reliably.

Quality engineers and inspectors - verify needle and needle-holder conformity using the specified tolerance classes.

Procurement and maintenance - select compatible needles and replacements that conform to recommended combinations to reduce downtime and inventory complexity.

Related standards

ISO 206 - System of tolerances and fits (referenced for tolerance methodology).

ISO 286 - Tolerance zones (E9, h9) used for needle-bar holes and shafts.

Keywords: ISO 8239, sewing machine needles, needle fitting dimensions, tolerances, shank diameter, butt-to-eye length, E9, h9, interchangeability, ISO 286.

ISO 8239:1987 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses this standard

Practical benefits

Related standards

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