The AirTAC AirTAC SDA40X140S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 140mm stroke, PT1/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA40X140S is a double-acting, single-rod compact cylinder engineered to deliver 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. Its riveted body assembly significantly reduces axial mounting depth compared to conventional round-body units, making it highly effective for machinery where space footprint is critical. The hard-anodized bore and two-way piston seal ensure durable performance across a 30-500 mm/s speed range.
This specific configuration includes a 140 mm stroke, which exceeds the 130 mm standard maximum for this 40 mm bore, classifying it as a non-standard, made-to-order item. It features a 16 mm piston rod, a PT1/8 air port, and a built-in piston magnet (-S) compatible with AirTAC reed or electronic switches. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion.
| Model | AirTAC SDA40X140S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 140 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×140 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Drives sorting pop-up arms on high-speed logistics conveyor lines, utilizing the 628.3 N extend force to reliably redirect parcels up to 32 kg.
Actuates the folding and flap-pressing mechanisms on automated packaging equipment, where the short riveted body conserves valuable axial floor space.
Serves as a secondary ejector in plastic injection molding cells, using the 140 mm travel to safely push finished parts clear of the machine platen.
When sizing this actuator, consider stepping down to the SDA32 bore, which provides 402.1 N of push force at 0.5 MPa, or stepping up to the SDA50 bore, which yields 981.7 N at the same pressure. For the current 40 mm bore, the safe working load is approximately 377 N (about 60% of the 0.5 MPa push figure), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. To finalize your order, confirm the 40 mm bore, 140 mm non-standard stroke, PT1/8 port, female rod-end thread (M8x1.25), and the required -S magnet option.
Keep in mind that a standard compact cylinder does not hold its position or load if air pressure is lost or the directional valve is centered; the piston will drift. The fixed NBR bumper only decelerates the stroke near its end and does not act as a locking brake. If your application requires absolute load holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, the push force is 879.6 N and the pull force is 738.9 N. The theoretical maximum push force is 128 kgf at the 1.0 MPa operating pressure limit.
No, the SDA series uses a fixed NBR bumper at each end to decelerate the stroke, not an adjustable air cushion. For high-speed or high-energy cycles, you should add an external shock absorber or slow down the approach speed. Additionally, this unit does not hold its load on air loss; use an external rod lock for position holding.
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