Actuators Service life has been improved with a lub-retainer compared with SMC’s standard models. Compatible with a low dew point (.40°C). 91- Series Material restriction + Lub-retainer 91-
-XC4 Series Material restriction + Lub-retainer + Heavy-duty scraper 91-CQ2 Series 91-CQ2
-XC4 Series Lub-retainer Lub-retainer Heavy-duty scraper 90- spec. Mounting dimensions are the same as those of standard models. 91- spec. 91-XC4 spec. 5 to 7 mm longer 3 to 5 mm longer Mounting Dimension Comparison Lub-retainer Heavy-duty scraper Lub-retainer Heavy-duty scraper Removal of foreign particles Lub-retainer Lub-retainer Grease lubrication Improved service life  Air Cylinder Mounting dimensions are not interchangeable with the 90- series. For use in dusty environment Dustproofing has been improved with a lub-retainer and heavy-duty scraper.  Air Cylinder Mounting dimensions are not interchangeable with the 90- and 91- series. Note) For some models, the minimum operating pressure may be different from that of standard models. Front matter 4