SMC CDQ2B125SZ (CDQ2B12-5SZ) - Compact Air Cylinder, 12 mm Bore, 5 mm Stroke

SMC CDQ2B125SZ Compact Air Cylinder — 12 mm bore, 5 mm stroke, SINGLE ACTING spring return (S), built-in magnet, rod end female thread, Z auto switch groove - NOT a 125 mm bore. SMC CQ2-Z Series compact air cylinder, standard type, SINGLE ACTING, single rod, spring return. Parsing note: the compressed part number CDQ2B125SZ resolves to CDQ2B12-5SZ, i.e. 12 mm BORE with a 5 mm STROKE - not a 125 mm bore. Verified on the SMC WEB Catalog, which returns 'CQ2 Z Series Compact Cylinder: Standard Type Single Acting, Single Rod' with Bore Size 12 (12 mm), Cylinder Stroke 5 (standard stroke 5 mm) and Action S = 'Single Acting, Spring Return'. Code breakdown: D = built-in auto switch magnet, B = through-hole mounting (standard), 12 = bore, blank port thread = Rc/M thread (M thread on 12-25 mm bores), 5 = stroke, S = single acting spring return (T is the spring extend code), blank body option = rod end female thread, Z = auto switch mounting groove (2 surfaces on 12-25 mm bores; 4 surfaces on 32-50 mm). Supplied without auto switch. Air is supplied to one port only; the return spring retracts the rod on exhaust. Operating pressure and theoretical output for the single acting version differ from the double acting model - refer to the SMC single acting CQ2 specification table (single acting CQ2 range is 12 to 50 mm bore). Replacement seal kit: CQ2B12-S-PS.

MPN: CDQ2B12-5SZ · SKU: CDQ2B125SZ

CDQ2B12-5SZ Applications

Single acting spring return means the rod retracts automatically when air is lost, which suits fail-safe clamps, hold-down fingers, small stops and ejectors where the safe state is retracted. Only one air line and a 3-port valve are needed, simplifying the circuit and halving air consumption compared with a double acting unit. The 12 mm bore with 5 mm stroke handles micro-clamping, pin locating and pressing duties in electronics, small parts assembly and test fixtures where space is extremely limited.

CDQ2B12-5SZ Specifications