Fitsch's deep-partnership Weichen is a leading manufacturer and direct supplier of heavy-duty automatic lubrication system parts and premium centralized lubrication system fittings built for modern automated environments. Engineered to maintain systemic pressure barriers between -40°C and 80°C up to 400 bar, our high-precision grease line fittings provide reliable fluid routing across vital machine friction points.
Our standard product line emphasizes high-demand 4mm and 6mm lubrication line fittings, which connect industrial oil and fluid grease pumps to central progressive divider blocks or block distribution manifolds. By incorporating protective return valves to isolate system pressure, Fitsch provides complete compatibility with industry standards set by mainstream global brands such as Parker etc.
Weichen Factory is certificated with ISO 9001 quality management system, more than 10 years experience of lubrication system fittings, please click our video from youtube Centralized Lubrication System Components From Raw Material to Finished Product WeiChen Factory Fit
Cutting Ring Fittings & Threaded Adapters&Grease Blocks:
A reliable automated grease line requires precise fluid routing and balanced pressure distribution. Our integrated centralized lubrication system components are engineered to connect main line feeds seamlessly to vital machine bearings.
Cutting Ring Fittings (Bite Type): Heavy-duty carbon and stainless steel connectors engineered to withstand working pressures up to 400 bar under extreme dynamic loads without slipping.
Threaded Adapters: Rigid, zinc-plated extensions, reducers, and connectors are interchangable into global standards (including Parker and SKF Lincoln) to interface with any system layout.
Grease Blocks: Precision-metering distribution hardware and progressive divider blocks built to deliver fixed, uniform quantities of lubricant to isolated friction points.
Centralized Lubrication Technical Specifications
Category | Connection / Thread Standard | Available Sizes / Options |
Tube Connections | DIN 2353 / ISO 8434-1 | 4mm, 6mm, 8mm, 10mm, 12mm |
DIN 3854 / DIN 3862 | 4mm, 6mm | |
Male Stud Taper Threads | DIN 158-1 Taper | M6x1 keg, M8x1 keg, M8x1.25 keg, M10x1 keg |
BSPT Thread | R 1/8, R 1/4 | |
NPT Taper Thread | NPT 1/8, NPT 1/4 |
High-Pressure Hose Studs & Threaded Sleeve Assemblies:
Threaded Screw Sleeves: Rugged, zinc nickel-plated outer jackets featuring internal threads that bite securely onto high-pressure plastic grease hoses without separating under extreme dynamic tension.
Straight & Elbow Hose Studs: High-precision pipe sockets available in Straight, 45°, and 90° configurations to seamlessly guide lubricant lines away from potential machinery shear risks.
Reusable Component Design: Engineered for field maintenance efficiency, allowing technicians to assemble or cut back high-pressure grease lines directly on site using standard wrenches.
Threaded Screw Sleeves Specifications
Screw sleeves serve as the critical connecting element that locks onto high-pressure grease lines to form a pressure-resistant, detachable connection without requiring specialized tooling.
Target Hose Size (ID x OD) | Thread Type / Standard | Hex Size (SW) | Total Sleeve Length (L) |
4.1 mm x 8.75 mm | Metric Left-Hand | 12 mm | 28.0 mm |
6.35 mm x 11.3 mm | Metric Left-Hand | 17 mm | 35.8 mm |
1/8" x 5/16" | Inch Left-Hand | 1/2" | 26.0 mm |
High-Pressure Hose / Tube Stud Specifications
Hose studs interface directly with the screw sleeves to connect high-pressure grease hoses with downstream progressive distributors, cutting ring fittings, or push-in fittings.
Engineering Parameter | Technical Specification Options & Standards |
Hose Size Compatibility | • 4.1 mm x 8.75 mm |
Geometric Angular Designs | • Straight (0°) |
Structural End Variant | • Groove-Free Studs: Machined smooth for rigid Cutting Ring Fittings. |
System Pressure Rating | Engineered to securely seal continuous automated grease lines up to 840 bar dynamic pressure. |
Available Material Formats | • Galvanized / Zinc-Nickel Plated Steel (Cr-VI Free) |
Instant Tool-Free Connection: High-volume, quick-connect mechanisms utilize internal stainless steel gripping claws to grab the plastic tubing securely upon insertion, reducing assembly overhead.
High-Pressure Integrity: Engineered with specialized internal seals to maintain airtight performance under extreme dynamic pressures up to 200 bar within continuous automated grease lines.
4mm & 6mm Optimization: Available in high-demand standard diameters to connect industrial oil and fluid grease pumps directly to progressive divider blocks or distribution manifolds.
Quick-Connect Push-In Fitting Specifications
These nickel-plated brass connectors are engineered to simplify grease line assembly by providing a reliable tool-free insertion mechanism.
Structural Configuration & Thread Layout Matrix
Fitting Geometry | Port Thread Specifications (Metric & Inch) | Wrench Size (SW) |
Straight Quick Connectors | • Metric: M6x1, M8x1, M10x1 tap threads | 10 mm to 12 mm |
Elbow Quick Connectors (Fixed) | • Metric: M6x1, M8x1, M10x1 tap threads | 10 mm |
Pivotable Swivel Elbows | • Metric: M6x1, M8x1, M10x1 tap threads | 13 mm |
T-Quick Unions | Available in standard Straight and Elbow push-in configurations | industrial sizing |
Precision-metering distribution hardware built to deliver fixed, uniform quantities of lubricant to isolated bearings.
Standardized straight, 45°, and 90° lubrication ports and adapters to handle manual or automated injection feeds safely.
Our premium stainless steel centralized lubrication fittings are specifically engineered for highly volatile, offshore, marine, and heavy industrial environments where traditional carbon steel components would prematurely fail.
Premium Corrosion Resistance: Forged from high-grade SS316L and SS304 stainless steel to withstand chemical washdowns, extreme salt spray, and moisture saturation without oxidizing.
DIN ISO 8434-1 Cutting Rings: Bite-type compression components form a tight, leak-proof mechanical seal directly on rigid stainless steel or polyamide lines, safely dampening heavy machine vibration.
Extreme Pressure Maintenance: Structurally rated to maintain system line integrity and uniform fluid routing under intensive continuous dynamic pressures up to 400 bar.
Construction Machinery: Excavators, wheel loaders, track components, and asphalt mixing plants.
On-Road Commercial Transport: Long-haul buses, commercial trucks, and specialized transport trailers.
Heavy Manufacturing Plants: Steel mills, automated material handling setups, and conveyor networks.
Commercial Production Lines: Paper and packaging equipment, and food & beverage facilities.
Renewable Energy: Wind power generation platforms and clean energy mechanical systems.
Fitsch can offer you catalog of fittings and accessories for lubrication systems, with dimension and part no which is analogs to Parker, SKF Lincoln, trico etc company standards. Material is carbon steel, stainless steel and brass for lubrication fittings.
DIN EN ISO 8434-1 24 degree cone tube connector with 4LL, 5LL, 6LL outside diameters for automatic lubrication system.
DIN 158-1 Standard Metric taper external screw thread of M6 keg, M8x1 keg and M10x1 keg for centralized lubrication system fittings.
DIN 74324 standard specifies requirements and methods of test for single-ply tubing of polyamide (as in DIN 73378) for use in the air braking systems of road vehicles and trailers
DIN 73378 standard specifies requirements for and methods of testing polyamide tubing intended for the transport of fuel in motor vehicles.
ISO 7628 thermoplastic tubing for air braking systems road vehicles.
DIN 2391 seamless precision steel tube
Here is our online Shop from made-in-china.cn for purchasing:
2026 Central Lubrication Fittings - Fitsch Ningbo International Trade Co. Ltd - page 1.
Click Here To Download the PDF Catalog
Technical Guide: Material Selection for Centralized Lubrication System Fittings
Catalog of Central Lubrication System Hoses and Fittings
