Grease Fitting Port: Temperature Range -40°C to 200°C

Component Specifications

Definition

A grease fitting port is a threaded or press-fit interface component designed to accept grease fittings (zerk fittings) for controlled lubricant delivery. It serves as the entry point for grease guns to inject lubricants into bearing housings, pivot points, and sliding surfaces within industrial machinery. The port maintains sealing integrity while allowing periodic maintenance without disassembly.

Working Principle

The grease fitting port operates as a controlled access point that connects external lubrication equipment to internal lubrication channels. When a grease gun coupling engages the fitting, hydraulic pressure forces lubricant through the port into designated cavities. A check valve or ball mechanism prevents backflow and contamination while maintaining internal pressure.

Materials

Carbon steel (AISI 1018/1020), stainless steel (304/316), brass (C36000), or alloy steel with corrosion-resistant plating (zinc, nickel, or chrome)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mounting	Threaded, weld-in, or press-fit
Seal Type	O-ring, tapered thread, or metal-to-metal
Thread Type	1/8" NPT, 1/4" NPT, M6x1, M8x1.25
Pressure Rating	Up to 10,000 psi (690 bar)
Temperature Range	-40°C to 200°C

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 6149, DIN 71412, SAE J514

Parent Products

This component is used in the following industrial products

Rod Gland / End Cap

A critical sealing and structural component at the rod end of a hydraulic cylinder that contains the piston rod seal and bearing.

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Engineering Analysis

Risks & Mitigation

Contamination ingress if seals fail
Cross-threading during fitting installation
Pressure buildup causing seal blowout
Corrosion in harsh environments

FMEA Triads

Trigger: Improper installation torque
Failure: Thread stripping or cross-threading
Mitigation: Use torque wrenches and follow manufacturer specifications

Trigger: Abrasive contamination
Failure: Premature seal wear and lubricant contamination
Mitigation: Install protective caps and clean area before lubrication

Trigger: Material incompatibility
Failure: Galvanic corrosion in dissimilar metal applications
Mitigation: Select compatible materials and use dielectric coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm thread pitch diameter, ±0.05mm concentricity

Test Method

Pressure testing per ISO 6149, leak testing with helium mass spectrometry, torque testing per DIN 71412

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

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Manufacturers of Grease Fitting Port

Manufacturer profiles associated with Grease Fitting Port.

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Frequently Asked Questions

What is the difference between a grease fitting port and a grease fitting?

The grease fitting port is the fixed receptacle installed on machinery, while the grease fitting (zerk fitting) is the removable component that attaches to the grease gun. The port provides the threaded interface, while the fitting serves as the coupling mechanism.

How often should grease fitting ports be inspected?

Inspect ports during routine maintenance cycles (typically every 250-500 operating hours). Check for thread damage, contamination, seal integrity, and proper alignment with lubrication channels.

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.

Grease Fitting Port