Optimize New Vacuum Suction Cup Assembly FESTO 1395671 VASB-15-18-PUR-B Designed For Reliable Part Handling In Pneumatic Vacuum System

The FESTO 1395671 VASB-15-1/8-PUR-B is a compact complete vacuum suction cup assembly designed for reliable part handling in pneumatic vacuum systems. In FESTO’s official data, this model is identified as a 15 mm suction cup with a G1/8 vacuum connection, a PUR suction element, and a round bellows design with 1.5 convolutions. It is intended for applications where a machine needs stable vacuum pickup in a small installation space while still benefiting from a degree of height compensation and flexible contact behavior.

What makes this model technically useful is not just its size, but the way its construction combines several practical handling features into one small assembly. FESTO specifies a 5.6 mm height compensator, 12.4 mm effective suction diameter, 0.83 cm³ suction cup volume, and nominal size 3 mm. Those figures indicate a component built for controlled vacuum gripping rather than heavy-duty lifting. In practical machine design, that usually means a product like this is well suited to light and repeatable pick-up tasks where compactness, simple installation, and predictable vacuum behavior matter more than maximum holding force alone. That conclusion is an engineering inference from the official dimensions and operating data.

Key Specifications

The table below summarizes the main technical data for FESTO VASB-15-1/8-PUR-B, part number 1395671, based on FESTO’s official product page and datasheet.

A major strength of the VASB-15-1/8-PUR-B is its bellows-type geometry. FESTO defines the suction cup shape as a round bellows with 1.5 convolutions, which generally means the cup can tolerate a small degree of height variation and contact irregularity better than a completely flat, rigid profile. That does not turn it into a heavy compensation device, but it does make it more forgiving in real production conditions where part surfaces are not always perfectly aligned. The 5.6 mm height compensation value reinforces that point. For machine builders, this kind of design can help reduce mis-picks and improve contact stability when handling lightweight workpieces in repetitive cycles. The statement about practical benefit is an inference from the official bellows geometry and compensation specification.

Another important feature is the balance between compact size and functional vacuum performance. FESTO lists a holding force of 8.5 N at the nominal operating pressure of -0.07 MPa (-0.7 bar). That figure places the product in the category of small vacuum gripping elements intended for light handling tasks rather than large-sheet or high-mass lifting. In automation terms, this is often exactly what is needed for fast, compact tooling where oversized suction hardware would only add weight, volume, and unnecessary air demand. With a product weight of only 11 g, the VASB-15-1/8-PUR-B is especially suitable where moving mass needs to stay low, such as on compact end effectors, lightweight transfer units, or densely packed vacuum manifolds.

The connection and installation format is also straightforward. FESTO specifies a top-positioned connection, G1/8 vacuum port, and mounting via the vacuum port, while also stating that the mounting position is optional. This combination simplifies integration into many vacuum assemblies because the component can be installed without a complicated bracket arrangement. From a design perspective, that can reduce the number of separate parts in the gripping head and help keep the vacuum path short and clean. When engineers are building compact handling stations, simple interface logic like this often matters as much as the suction specification itself. The advantage described here is an inference from the official connection and mounting configuration.

Material selection is another point worth noting. FESTO specifies a PUR suction cup material and a brass screwed plug, and identifies the assembly as RoHS-compliant. The datasheet also states a Shore hardness of 60 +/- 5 and a CRC 2 corrosion resistance classification, which FESTO describes as moderate corrosion stress. These details matter because vacuum cups are wear parts, and their material behavior has a direct effect on sealing, flexibility, service life, and compatibility with the handled workpiece. PUR is commonly selected in industrial vacuum handling where a user wants a practical compromise between elasticity and resistance to wear. The last sentence is a general engineering interpretation rather than a direct quote from FESTO.

The operating range is also clearly defined. FESTO gives an operating pressure range from -0.095 MPa to 0 MPa, equivalent to -0.95 bar to 0 bar, and an ambient temperature range from -20 °C to 60 °C. It also specifies atmospheric air based on ISO 8573-1:2010 [7:-:-] as the operating medium. These are practical industrial values. They indicate that the suction cup is meant to work in standard vacuum handling systems using prepared air, and that it can function across a fairly broad ambient temperature window. For users, this means the product is suitable for general industrial environments provided the vacuum system is designed correctly and the handled part remains within the cup’s holding capability.

From an application standpoint, the VASB-15-1/8-PUR-B is best described as a compact vacuum gripping component for precise and repeatable light-duty handling. Because the cup diameter is 15 mm, the effective suction diameter is 12.4 mm, and the assembly is very light, it is not aimed at large or high-mass products. Instead, its value lies in controlled handling of relatively small parts where repeatability, compactness, and uncomplicated installation are more important than brute lifting capacity. Its bellows profile, height compensation, and top vacuum connection make it particularly attractive in tightly arranged tooling where the gripper must adapt slightly to the part while still fitting into a compact machine layout. That application summary is based on the official specifications and standard vacuum handling design logic.

Another advantage is product clarity. FESTO’s official identification of this item as a complete suction cup assembly reduces ambiguity during selection and replacement. Buyers are not only dealing with a bare elastomer cup; they are selecting a defined configuration with connection, material, size, and performance parameters already specified. In maintenance and procurement work, that matters because it lowers the risk of mixing incompatible vacuum cup bodies, threads, or materials. For OEMs, that also helps standardize spare parts and makes documentation cleaner when the machine BOM needs exact replacement references. This is an operational inference based on the way FESTO defines the product and part number.

In overall terms, the FESTO 1395671 VASB-15-1/8-PUR-B is a well-defined, compact vacuum handling solution for light industrial automation. Its official specification combines a 15 mm PUR bellows suction cup, G1/8 connection, 5.6 mm height compensation, 8.5 N holding force at nominal vacuum, and a very low product weight of 11 g. That combination makes it a practical choice for designers who want a small, ready-to-integrate suction cup assembly with stable vacuum performance and straightforward installation. For systems that need compact vacuum pickup without unnecessary complexity, this model is a technically sound and easy-to-specify option.