SMC ZPT13BNK20-04-A10 | ZP Series Basic Bellows Vacuum Pad 13mm Vertical Inlet With Buffer NBR Rubber 20mm Stroke One-Touch Fitting

The SMC ZPT13BNK20-04-A10 is a bellows type vacuum pad from the ZP series, featuring a 13mm pad diameter with NBR rubber construction, vertical vacuum inlet, and 20mm buffer stroke. This configuration combines the angular compensation of the bellows design with a generous 20mm buffer travel, providing substantial compliance for applications where workpiece height varies significantly or where gentle, extended-travel approach is needed to prevent damage to delicate components.

What applications benefit from a 20mm buffer stroke on a 13mm bellows pad? The extended 20mm buffer is particularly valuable in tray-based component feeding systems where part heights vary due to stacking inconsistencies, in multi-level pick operations where the pad must accommodate different component heights within the same pick cycle, and in applications where the robot's Z-axis positioning has wider tolerances that must be compensated mechanically at the pad level. The K-type buffer spring provides firm, positive return force.

NBR (nitrile butadiene rubber), designated by the "N" material code, is the standard industrial material offering reliable vacuum sealing, excellent oil resistance, and cost-effective performance within 0°C to +70°C. For this 13mm bellows configuration, NBR provides the optimal balance of seal conformability around the bellows convolutions and durability for extended cycle life in production environments.

The ø4mm one-touch fitting ("04") enables tool-free pneumatic connection, and the "A10" buffer body is sized for 13mm class pad assemblies. This pad integrates with SMC's complete vacuum product range and is RoHS compliant. The ZPT series offers diameters from 2 to 125mm with four pad designs and six material options.