The lubrication line compression fittings Straight Union provides a robust, inline tube-to-tube connection designed specifically for high-frequency automatic lubrication and centralized grease systems. Featuring an identical, symmetric connection profile on both ends, this equal union joins two separate metric lines of the exact same diameter seamlessly, eliminating pressure drops and ensuring uninterrupted flow to downstream distribution blocks.
As a dedicated global OEM and bulk supplier, our production facilities employ high-precision Swiss-type turning lathes to guarantee perfectly matched, aligned internal bores and tight machining tolerances across both entry ports. Every batch is pressure-validated to survive the harsh mechanical pulses generated by progressive lubrication pumps. This straight coupling acts as the ideal splicing or extension link for delicate, small-diameter lines routing through complex mechanical chassis.
Part No. | ØD | Series | L1 | S1 | S2 | Designation | BEK | FRI | SK | Weight |
1LL-4 | 4 | LL | 31 | 9 | 10 | G4LL | 04013600106 | 104-000 | 223-12531-8 | 15g |
1LL-6 | 6 | LL | 32 | 11 | 12 | G6LL | 04013600313 | 106-000 | 223-12482-9 | 21g |
1LL-8 | 8 | LL | 35 | 12 | 14 | G8LL | 04013600406 | 108-000 | 223-12531-9 | 26g |
1L-10 | 10 | L | 42 | 17 | 19 | G10L | 04013601206 | 110-000-L | 223-12531-2 | 65g |
Core Technical Blueprint & Symmetric Assembly
The Lubrication Line Advantage: Tailored for the Extra Light (LL) Series parameters, this inline union handles operating boundaries up to 100 bar, matching the standard limits of automated oil and grease lines (engineered for small-diameter tubing ranging from 4mm to 12mm). Its thin-walled, low-mass structure allows it to fit inside the tightest machinery corridors without adding unnecessary weight.
Symmetric Metric Design: Engineered as a direct tube-to-tube joiner, both ends feature identical 24° internal cones machined to the same metric specifications. This eliminates the need for mixed adapters, allowing maintenance crews to connect or repair tubing runs using one standardized component.
Metric Taper Tube Seats: Matches standardized European and global machinery lubrication loops for direct, identical cross-over plumbing.
Application & Compliance
Double-Bite Sealing Mechanics: Tightening the dual compression nuts drives both cutting rings inward simultaneously, forcing them to bite firmly into the exterior surface of the copper, steel, or high-pressure nylon lubrication tubes. This continuous, balanced mechanical grip prevents line blowouts and stays completely leak-free under severe vibration, constant machine cycling, and shock loads.
Traceable Compliance: Manufactured in strict accordance with ISO 8434-1 and DIN 2353 extra-light guidelines. These identical straight unions offer complete interchangeability with leading global fluid handling brands, making them the industry standard for wind turbine bearings, commercial vehicle chassis lubrication, printing presses, and automated assembly conveyor networks.
