Sealing Gland: Cable Diameter Range 3mm to 25mm

Component Specifications

Definition

A sealing gland, specifically within industrial wire harness strain relief bushings, is a precision-engineered component designed to secure and seal the entry point of cables or wires into an enclosure. It functions by compressing a sealing element (typically an elastomeric gasket or O-ring) against the cable and the enclosure wall, creating a watertight, dustproof, and strain-resistant seal. This prevents environmental contaminants from entering the enclosure while also anchoring the cable to absorb mechanical stress, vibrations, and pull forces, thereby protecting internal electrical connections from damage.

Working Principle

The sealing gland operates on a compression sealing principle. When the gland nut is tightened, it axially compresses a sealing element (e.g., a rubber grommet or conical seal) between the gland body and the enclosure. This compression radially deforms the seal against both the outer jacket of the cable and the inner wall of the mounting hole, creating a hermetic barrier. Simultaneously, the mechanical grip of the gland body and nut provides strain relief by clamping the cable, transferring any tensile or vibrational loads to the enclosure rather than the internal terminations.

Materials

Body: Nylon 6/6, Polyamide, Stainless Steel (AISI 304/316), Brass, Aluminum. Sealing Element: Nitrile Rubber (NBR), Ethylene Propylene Diene Monomer (EPDM), Silicone (VMQ), Fluorocarbon (FKM/Viton). Gland Nut: Same as body material or coated steel.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP68, IP69K
Thread Size	M12x1.5 to M40x1.5 (metric), PG7 to PG21 (conduit), NPT 1/4" to 1"
Pressure Rating	Up to 10 bar (with appropriate seal)
EMI/RFI Shielding	Optional (with metallic components or conductive seals)
Temperature Range	-40°C to +120°C (dependent on seal material)
UL/CSA Recognition	Yes (for flame-retardant materials)
Cable Diameter Range	3mm to 25mm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, DIN 40050-9, IEC 60529, UL 94, RoHS, REACH

Parent Products

This component is used in the following industrial products

Industrial Wire Harness Strain Relief Bushing

Mechanical component that secures and protects wire harnesses at entry/exit points.

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Engineering Analysis

Risks & Mitigation

Incorrect installation leading to seal failure
Material incompatibility causing chemical degradation
Over-tightening damaging the cable or threads
Undersized gland allowing cable pull-out
Vibration loosening the gland nut over time

FMEA Triads

Trigger: Improper torque application during installation
Failure: Insufficient compression leads to seal leakage; over-torque cracks the gland body or deforms the seal permanently
Mitigation: Use a calibrated torque wrench following manufacturer specs; implement installer training and visual torque indicators

Trigger: Chemical exposure incompatible with seal material
Failure: Seal swelling, cracking, or degradation, resulting in loss of environmental protection
Mitigation: Conduct material compatibility testing for specific chemicals; select FKM or EPDM seals for aggressive environments

Trigger: High vibration or thermal cycling
Failure: Gland nut loosening, loss of compression, and eventual seal failure
Mitigation: Apply thread-locking adhesive; use glands with locknuts or spring washers; specify designs with vibration-resistant features

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Thread tolerance: 6g for metric threads per ISO 965-1; cable entry hole tolerance: ±0.5mm; seal compression force: 20-30 N·m per diameter range

Test Method

IP rating tested per IEC 60529 (water/dust ingress); vibration testing per IEC 60068-2-6; pull-out force tested per UL 2238; material flammability per UL 94; chemical resistance per ASTM D471

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Sealing Gland

Manufacturer profiles associated with Sealing Gland.

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Frequently Asked Questions

What is the difference between a sealing gland and a standard cable gland?

A sealing gland specifically incorporates enhanced sealing elements and strain relief features designed for wire harness applications in harsh environments, often meeting higher IP ratings (like IP68/IP69K) and providing superior vibration resistance compared to basic cable glands.

How do I select the right sealing gland material?

Choose based on environment: Nylon for general use, stainless steel for corrosive/outdoor settings. Select seal material: NBR for oils, EPDM for weather/steam, Silicone for high/low temperatures, FKM for chemicals. Ensure compatibility with cable diameter and thread type.

Can sealing glands be reused?

Typically, yes, but the sealing element may degrade with repeated compression. Inspect seals for cracks or permanent deformation after disassembly. It is recommended to replace the sealing element during maintenance for guaranteed performance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Sealing Gland