Rod seal UIB2

Description

The UIB2 is a compact single-acting rod seal for heavy-duty hydraulic applications, with an integrated back-up ring, an additional support edge and a sealing edge. It includes components for axial fixing in the housing and press fit at the outside diameter, with dimensions for standardised housings according to ISO 5597. It offers very good static and dynamic tightness and permits high pressures and larger gap widths.

Assembly

Fit into a closed groove according to the dimensions on the datasheet, respecting the axial fixing and the press fit at the outside diameter. Clean the housing thoroughly, chamfer and round off sharp edges and do not drag the seal over cutting edges. Lubricate the rod before assembly and combine it with a single-acting wiper for best results.

Advantages

Materials

Made of POLYURETHANE for the sealing profile ring and PA for the back-up ring. This combination provides high resistance to pressure, wear and extrusion, and is compatible with mineral hydraulic oils and greases. For HFA, HFB and HFC fire-resistant fluids, compatibility and temperature ranges should be confirmed according to the compound.

Technical data

NO.	Ød	ØD	b	B	C
U-40508 UIB2	40	50	8	8	4.5
U-45558 UIB2	45	55	8	8	4.5
U-506512.5 UIB2	50	65	12.5	12.5	5.5
U-567112.5 UIB2	56	71	12.5	12.5	5.5
U-637812.5 UIB2	63	78	12.5	12.5	5.5
U-658013 UIB2	65	80	13	13	5.5
U-69.858513 UIB2	69.85	85	13	-	-
U-708512.5 UIB2	70	85	12.5	12.5	5.5
U-759013 UIB2	75	90	13	13	5.5
U-809512.5 UIB2	80	95	12.5	12.5	5.5
U-8510013 UIB2	85	100	13	13	5.5
U-9511013 UIB2	95	110	13	13	5.5
U-10012016 UIB2	100	120	16	16	6
U-11013016 UIB2	110	130	16	16	6
U-11513013 UIB2	115	130	13	13	5.5
U-12514516 UIB2	125	145	16	16	6
U-14016016 UIB2	140	160	16	16	6

Technical drawing and installation parameters of the UIB2 rod seal

This technical diagram defines the essential dimensions and geometric variables for the correct housing and installation of the UIB2 rod seal. It specifies the critical dimensions from the data tables, including the seal width (b), the groove width (B), the rod inner diameter (Ød) and the housing outer diameter (ØD). It also details the maximum groove bottom radius (r < 0.40 mm), the extrusion gap (E), the length of the lead-in chamfer (C) and its 20° angle. These parameters ensure suitable compression and axial retention of the seal, prevent extrusion failures at high pressures and protect the sealing lips during installation.

Three-dimensional view and components of the UIB2 rod seal

This 3D illustration details the basic structure of the UIB2 compact single-acting rod seal for heavy-duty hydraulic applications. The diagram clearly shows its key elements: the polyurethane body, the asymmetrical sealing lips (with the shortened inner lip and a sealing edge/secondary lip) and the integrated polyamide (PA) back-up ring. This configuration is designed to provide excellent static and dynamic sealing, withstanding high pressures (up to 50 MPa) and larger extrusion gaps without any loss of performance.

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