SMC ZPT08UNK10-04-A8 | ZP Series Basic Flat Vacuum Pad 8mm Vertical Inlet With Buffer NBR Rubber 10mm Stroke One-Touch Fitting

The SMC ZPT08UNK10-04-A8 is a basic flat type vacuum pad from the ZP series, configured with an 8mm pad diameter, NBR rubber construction, vertical vacuum inlet, and 10mm buffer stroke for general-purpose small component handling. The flat "U" type pad provides maximum contact area on smooth, flat workpiece surfaces, delivering reliable vacuum seal formation for consistent pick-and-place performance in automated assembly, testing, and packaging operations.

How does the ZPT08UNK10-04 compare to the ZPT08BUK15-B5? Both pads share the 8mm diameter and vertical entry configuration, but differ in two critical ways: pad shape and material. The ZPT08UNK10 uses a flat pad shape with NBR rubber, optimized for flat, smooth surfaces at standard temperatures (0°C to +70°C). The ZPT08BUK15 uses a bellows shape with urethane, better suited for curved or angled surfaces with mark-free requirements. Choosing between flat and bellows depends on your workpiece geometry and surface sensitivity requirements.

The 10mm buffer stroke ("K10") provides moderate shock absorption during workpiece approach, protecting both the pad and delicate components from impact damage during high-speed cycling. The ø4mm one-touch fitting ("04") enables tool-free pneumatic connection for rapid installation, replacement, and reconfiguration. The "A8" designation specifies the buffer body assembly compatible with 8mm class pads.

NBR (nitrile butadiene rubber) is the most widely specified vacuum pad material for industrial automation, offering excellent resistance to oils, hydraulic fluids, and common industrial chemicals. This pad is RoHS compliant and part of SMC's ZPT series spanning 2 to 125mm diameters with six materials and four pad designs for comprehensive application coverage.