What are SMC stopper cylinders and where are they used industrially?

SMC stopper cylinders are specialized pneumatic actuators designed for heavy-duty positioning and blocking applications in automated production lines. These cylinders, including the RS2H series with bore sizes from 50mm to 80mm, provide precise stopping force for workpiece positioning, conveyor indexing, and machine tool clamping operations. Primary industrial applications include automotive assembly lines, packaging machinery, material handling systems, and injection molding equipment where reliable positioning and holding forces are critical for production quality and cycle time optimization.

What technical criteria determine SMC stopper cylinder selection?

Technical selection of SMC stopper cylinders requires evaluation of bore diameter, stroke length, mounting configuration, and operating pressure requirements. The RS2H series offers bore sizes of 50mm, 63mm, and 80mm with stroke lengths ranging from 30mm to 40mm, operating at standard pneumatic pressures of 0.1 to 1.0 MPa. Critical selection factors include required stopping force, available mounting space, port thread specifications (typically M5 or G1/8), and environmental conditions such as temperature range and contamination exposure that affect seal material compatibility and cylinder longevity.

Which international standards apply to SMC stopper cylinders?

SMC stopper cylinders comply with ISO 15552 for pneumatic cylinder dimensions and ISO 8573 for compressed air quality requirements. The cylinders meet EN 983 safety standards for pneumatic systems and incorporate ISO 4762 socket head cap screws for mounting hardware. Electrical connections, where applicable, conform to IEC 61131 standards for industrial automation systems. These certifications ensure compatibility with European machinery directive requirements and facilitate integration into CE-marked automation equipment across manufacturing industries.

How do different SMC RS2H stopper cylinder variants differ?

SMC RS2H stopper cylinder variants differ primarily in bore diameter, mounting style, and port configuration within the heavy-duty series designation. The RS2H50, RS2H63, and RS2H80 models feature 50mm, 63mm, and 80mm bore diameters respectively, with suffix codes indicating specific mounting options like TF for through-rod configuration and A for standard mounting. Port designations such as BL, DL, BM, and DM specify pneumatic connection orientations and thread specifications, while additional suffixes like -D, -P, and -R indicate special sealing, cushioning, or orientation requirements for specific application environments.

What installation requirements apply to SMC stopper cylinders?

SMC stopper cylinder installation requires compressed air supply at 0.1 to 1.0 MPa with air quality meeting ISO 8573-1 Class 7.4.4 standards for particles, water, and oil content. Mounting surfaces must provide adequate rigidity to handle reaction forces, with bolt torque specifications varying by cylinder size from 8 Nm for M6 bolts on smaller units to 25 Nm for M10 bolts on 80mm bore models. Pneumatic connections utilize standard G1/8 or M5 threads with appropriate thread sealant, and electrical connections for position sensing require IP65-rated cable glands when integrated with proximity switches or linear encoders.

What are the operating temperature and pressure limits for SMC stopper cylinders?

SMC RS2H series stopper cylinders operate within temperature ranges of -10°C to +60°C for standard nitrile seals, with optional fluoroelastomer seals extending operation to +80°C for elevated temperature applications. Operating pressure range spans 0.1 to 1.0 MPa with proof pressure rating of 1.5 MPa for safety margin verification during commissioning. The cylinders achieve IP40 protection class as standard configuration, with optional IP65 rating available through enhanced sealing for harsh industrial environments involving washdown procedures or contaminated atmospheres common in food processing and chemical manufacturing facilities.

What maintenance intervals and service life expectations apply to SMC stopper cylinders?

SMC stopper cylinders require preventive maintenance inspection every 500,000 cycles or 12 months, whichever occurs first, including examination of rod seals, end cap condition, and pneumatic connection integrity. Expected service life reaches 20 million cycles under normal operating conditions with proper air preparation and contamination control according to ISO 8573 standards. Seal replacement typically occurs at 5-year intervals or upon detection of internal leakage exceeding 10 ml/min at 0.6 MPa, with complete cylinder overhaul recommended after 10 years of continuous operation to maintain positioning accuracy and safety performance in critical automation applications.

Stopper cylinder

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Discover Superior Control with SMC Stopper Cylinders

SMC stopper cylinders are a cornerstone in the realm of pneumatic and hydraulic solutions, offering unmatched precision and reliability. These stopper cylinders are engineered to deliver exceptional performance in controlling and halting linear motion in automated systems. Whether you're optimizing an existing setup or initiating a new project, SMC stopper cylinders provide the robust support and control necessary for efficient operation.

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