Strength Class Definition – Jump Rings

This page defines the structural strength classification system used by ONESIKA for jump rings. Strength classes are determined by wire diameter, ring diameter, and intended load, rather than appearance alone.

---

1. Strength Classification Principles

Jump ring strength is evaluated based on three primary factors:

1. Wire Diameter (WD) – primary determinant of tensile strength

2. Ring Diameter (OD / ID) – affects leverage and deformation risk

3. Intended Use – frequency of movement and load conditions

ONESIKA assigns strength classes to support reliable assembly decisions, not to imply absolute load ratings.

---

2. Strength Class Overview

Strength Class	Definition	Typical Characteristics
Light	Designed for minimal load and decorative connections	Thin wire, small OD, visually delicate
Medium	Balanced strength for everyday jewelry use	Moderate wire thickness, stable geometry
Heavy	Designed for structural or load-bearing connections	Thick wire, deformation-resistant

---

3. Strength Class Assignment Rules

Light Strength

Criteria

• Wire Diameter: ≤ 0.6 mm

• Outer Diameter: ≤ 4 mm

• Typical ID: ≤ 2.8 mm

Typical Use

• Earrings

• Fine chain connections

• Decorative elements with minimal load

Notes

• Not recommended for bracelets or high-movement areas

• Prioritizes appearance over structural strength

---

Medium Strength

Criteria

• Wire Diameter: 0.8 mm

• Outer Diameter: 5–6 mm

• Typical ID: 3.4–4.4 mm

Typical Use

• Bracelets

• Necklaces

• Standard clasp connections

Notes

• Most versatile class

• Suitable for frequent wear and movement

---

Heavy Strength

Criteria

• Wire Diameter: ≥ 1.0 mm

• Outer Diameter: ≥ 5 mm

• Typical ID: ≥ 3.0 mm

Typical Use

• Structural links

• Load-bearing connections

• Statement jewelry

Notes

• Strength prioritized over delicacy

• May appear visually heavier

---

4. Strength Class Reference – Current ONESIKA Sizes

Jump Ring Size (WD × OD)	Strength Class	Primary Use
0.6 × 3 mm	Light	Fine connectors
0.6 × 4 mm	Light	Earrings
0.8 × 5 mm	Medium	Bracelets
0.8 × 6 mm	Medium	Necklaces
1.0 × 5 mm	Heavy	Structural links
1.0 × 6 mm	Heavy	Load-bearing connections

---

5. Important Notes on Strength Classification

• Strength classes are relative, not absolute load ratings.

• Actual performance depends on material type, temper, and closure quality.

• For critical connections, always select a larger wire diameter or smaller ID when possible.

• Strength definitions are intended to guide component selection, not replace testing.

---

6. Relationship to Other Standards

• Dimensional definitions follow Size & Gauge Reference – Jump Rings

• Field usage aligns with Product Specification Schema – Jump Rings

• Application guidance is detailed in Compatibility Matrix – Jump Rings

---

7. Change Control

Strength classifications may be updated as new sizes or materials are introduced. Refer to the most recent version of this document for current standards.