The transportation of delicate items often requires greater control of cylinder acceleration and deceleration than is afforded by traditional air cushions. For this reason, SMC has developed the REC sine cylinder. The term "sine cylinder" is derived from the shape of the velocity curve at both ends of stroke. This control is achieved with the addition of two grooves on each cushion spear which
st: , 1001 to 1500 st: JIS Symbol Standard Stroke Maximum manufacturable stroke (mm) Minimum stroke (1) Bore size (mm) Standard stroke (2) (Recommended) (mm) 20 150 Up to 700 25 150 Up to 700 1500 32 150 Up to 1000 40 200 Up to 1000 Note 1) The cylinder performance may not as expected when stroke is longer than recommended stroke even they are available.