Deublin Precision Rotary Joints & Spindle Coolant Connectors – New Expanded Lineup for Crane & Heavy Machinery Applications

Published on: 2026-05-24

Qinma Crane is proud to announce the new expanded lineup of Deublin (杜博林) high‑precision rotary joints, spindle coolant connectors, and hydraulic rotary unions — engineered for extreme durability, precise sealing performance, and reliable operation in port cranes, heavy‑duty machinery, industrial automation, and hydraulic systems.

Deublin, a global leader in rotary union technology since 1945, is renowned for its Pop‑Off sealing technology, high‑speed stability, and long service life — making it the preferred choice for critical rotating fluid transfer applications worldwide.

Key Advantages of Deublin Rotary Joints for Crane & Industrial Use

Ultra‑Precision Sealing: Leak‑tight performance for coolant, hydraulic oil, air, and other industrial fluids.
High‑Speed & High‑Pressure Rating: Suitable for spindle coolant up to 2,000 psi and continuous rotary motion.
Long Service Life: Hardened stainless steel components with corrosion‑resistant coating.
Global Quality Standard: Manufactured under ISO quality control, widely used in ports, steel mills, and heavy machinery.
Multi‑Thread Compatibility: UNF, NPT, PT, Metric (M) threads available for seamless integration.

New Expanded Product Lineup (Key Specifications)

The new series covers 1005, 1101, 1102, 1109, 1114, 1115, 1116, 1117, 1121 models, with thread sizes from 1/8" to 5/8" and metric M10–M16, plus various pilot diameters and overall lengths.

Featured Models Highlights

1005 Series: Compact 3.18 mm seal, 1/8" NPT / UNF / Metric threads, 65–76 mm length — ideal for small cranes and auxiliary equipment.
1101 Series: M16×1.5 heavy‑duty body, 3/8" NPT/PT/G threads, 3.78"–4.331" length — perfect for main crane hydraulic systems.
1109 Series: Long‑body (4.882"–5.787") high‑capacity joints for heavy‑load port cranes and offshore machinery.
1114–1121 Series: Female hex, O‑ring seal, and special pilot designs for custom hydraulic and coolant applications.

Full Technical Specifications Table

Model	Seal / Pilot	Thread	Length	OD
1005-000-019	3.18 mm	3/8"-24 UNF RH	69.9 mm	28.372 mm
1005-000-037	3.18 mm	M10×1 RH	70 mm	28.372 mm
1005-000-038	3.18 mm	1/8"-27 NPT RH	70 mm	28.372 mm
1005-165-061	5/8"-18 UNF RH, 16.649 mm pilot	1/8"-27 NPT	81 mm	28.372 mm
1101-195-343	M16×1.5 LH, 0.708" pilot	G 3/8"-19	4.016"	1.687"
1101-339-259	M16×1.5 LH, 0.631" pilot	3/8"-18 NPT	3.78"	1.687"
1109-020-188	M16×1.5 LH, 0.708" pilot	G 3/8"-19	5.315"	2.106"
1114-710-717	Female Hex, 0.432" pilot	G 3/8"-19	5.354"	2.323"
1116-656-578658	M16×1.5 RH, 0.708" pilot	G 1/4"-19	6.102"	1.752"
1121-380-345	M16×1.5 LH, 0.708" pilot	G 3/8"-19	3.858"	2.126"