Description

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Our high-pressure grease fitting joint ensures secure, leak-proof connections between lubrication pumps, supply lines, and bearings, delivering reliable grease delivery under rigorous industrial conditions.

Technical Specifications

Technical Parameter	Specification / Standard Range
Compatible Media	Grease (NLGI #0 to #3), Synthetic & Mineral Oils
Max Working Pressure	Up to 400 bar / 5800 psi (dependent on size and configuration)
Safety Factor	3:1 Burst-to-Working Pressure Ratio
Thread Standards	BSPT, NPT, Metric (M10x1, M12x1, M14x1.5), G-Thread, SAE
Operating Temperature	-40°C to +120°C (-40°F to +248°F, seal-dependent)
Body Material Options	Carbon Steel (Zinc-Plated), Brass, Stainless Steel (AISI 304 / 316)
Internal Seal Material	NBR, Viton (FKM for high-temp/chemical applications)
Compatible Tubing OD	4 mm, 6 mm, 8 mm, 10 mm, 12 mm / 1/4", 3/8"
Surface Treatment	Cr3+ White/Yellow Zinc Plated, Passivated Stainless Steel

Grease Fitting Joint

We offer a comprehensive selection of configurations to match diverse equipment layouts and routing angles:

Straight Connectors (180°): Ideal for direct, linear line routing from distributors to standard lube points.

Elbow Fittings (90° & 45°): Designed for tight spaces and awkward angles, preventing line kinking and tension.

Tee & Cross Junctions: Multi-way fittings used to branch out a single lubrication line to feed multiple bearings simultaneously.

Swivel Joints: Articulated fittings that allow rotational movement, preventing twisting fatigue in dynamic or moving machine parts.

Material Options

To survive diverse operational environments, our fittings are available in multiple material grades:

Carbon Steel (Zinc-Plated): Cost-effective, high-strength choice featuring trivalent passivation for standard industrial protection.

Brass: Excellent corrosion resistance and anti-galling properties, frequently used in pneumatic and light-duty fluid systems.

Stainless Steel (AISI 304 / 316): Ultimate choice for highly corrosive, marine, chemical, or food-grade processing environments requiring resistance to oxidation and harsh washdowns.

OEM / ODM & Customization

We specialize in tailoring lubrication components to meet exact Original Equipment Manufacturer (OEM) specifications:

Custom Dimensions & Threads: Non-standard thread pitches, special body lengths, and specific port sizes engineered to match your proprietary block designs.

Private Labeling: Laser-etched part numbers, custom logo stamping on the body, and bespoke barcoded packaging for distributor brands.

Specialized Coatings: Advanced surface treatments (such as PTFE or nickel plating) available upon request for extreme temperature or corrosive environments.

Quality Assurance & Standards Compliance

Material Traceability: Certified Mill Test Reports (MTR) provided upon request to verify raw material composition.

100% Factory Pressure Testing: Proof-pressure tested to ensure zero leakage under operating thresholds.

Corrosion & Tolerance Checks: Regular salt-spray audits and optical comparator thread measurements ensure compliance with international hydraulic and lubrication standards.

Certificates: Manufactured under ISO 9001 quality management systems.

Packaging & Logistics

Inner Packaging: Each batch of fittings is counted, oil-coated for temporary anti-rust protection, and sealed in heavy-duty polyethylene bags with clear label identification (Part Number, Batch Code, Quantity).

Outer Packaging: Packed in double-walled corrugated export cartons, then palletized and shrink-wrapped for sea or air freight transit. Custom barcode labeling and private-label packaging are available for global distributors.

Shipping Terms: EXW, FOB, CIF, DDP via air express, air cargo, or ocean container shipping. Real-time tracking and full customs documentation (Certificate of Origin, Material Test Report) are provided with every shipment.

Frequently Asked Questions

Q: What is the maximum working pressure of your grease fitting joints?

A: Our standard carbon steel and stainless steel joints are designed to handle working pressures up to 400 bar (5,800 psi), featuring a 3:1 safety burst ratio. Always check the specific part number datasheet for exact pressure ratings matching your tube size.

Q: Can these joints be used with both grease and oil?

A: Yes. They are fully compatible with standard lubrication grease up to NLGI Grade 3, as well as mineral and synthetic lubricating oils, provided the correct internal seal material (NBR or Viton) is chosen for your media.

Q: What thread standards do you support?

A: We manufacture a comprehensive range of international thread standards including BSPT, NPT, Metric (M-threads like M10x1, M12x1), G-threads (BSPP), and SAE threads. Custom thread types can be produced based on OEM engineering drawings.

Q: What is the difference between your Carbon Steel and Stainless Steel fittings?

A: Carbon steel fittings feature a high-grade trivalent chromium zinc plating, offering 300+ hours of salt spray protection, ideal for standard industrial environments. Stainless Steel (AISI 304 or 316) options are recommended for highly corrosive, marine, chemical, or food-grade processing applications.

Q: Do you provide 3D CAD files for engineering design?

A: Yes. You can download free 3D CAD models in STEP and IGES formats directly from our resources section or request them from our engineering support team to drop straight into your equipment assemblies.

Q: What is your Minimum Order Quantity (MOQ) for standard versus custom items?

A: For standard stock items, our MOQ is flexible to support sample testing and small-batch MRO orders. For custom thread sizes, specialized materials, or private labeling, minimum order quantities apply-please contact our sales engineering team for a tailored quote.

Q: Do you offer free samples for testing?

A: Yes, we welcome OEM and qualified industrial buyers to evaluate our product quality. Free samples of standard configurations can be provided, with freight collect or covered by the buyer.

Q: How do you package fittings to prevent transit damage and rust?

A: Fittings are treated with a light anti-rust protective film, sealed in heavy-duty plastic bags by size, and packed inside sturdy export-grade cartons secured on wooden pallets to prevent crushing or moisture damage during international shipping.

Q: What is your standard production lead time?

A: For standard catalog items in stock, orders typically ship within 3 to 5 business days. Custom production runs or OEM bulk manufacturing generally require 20 to 30 days depending on order volume and plating requirements.

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