The AirTAC AirTAC SDA40X45S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 45mm 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 SDA40X45S is a double-acting, single-rod compact cylinder engineered to deliver a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. Its short riveted body design significantly reduces axial mounting depth, offering a distinct space-saving advantage for machinery where a standard round-body unit simply will not fit. The hard-anodized bore and two-way piston seal ensure durable, reliable linear motion.
This specific configuration includes a built-in piston magnet (-S) for position detection via AirTAC reed or electronic switches mounted in the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be added for high-energy loads. Operating at speeds between 30-500 mm/s, it features a 16 mm piston rod and a PT1/8 air port.
| Model | AirTAC SDA40X45S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 45 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. |
| ×45 | 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).
Secures aluminum engine blocks during CNC machining, utilizing the 628.3 N extend force to hold parts rigidly against the spindle torque without consuming excessive Z-axis height.
Drives the mechanical arms that tuck top flaps on packaging lines, where the 45 mm stroke and compact riveted body fit neatly within tight conveyor side-rail clearances.
Acts as a pneumatic stop pin for incoming pallets on a roller conveyor, absorbing the impact via the fixed NBR bumper while the 16 mm rod resists lateral deflection.
When sizing this 40 mm bore unit, consider stepping down to the SDA32 which yields 402.1 N of push force at 0.5 MPa, or moving up to the SDA50 which provides 981.7 N at the same pressure. For this SDA40X45S model, the safe working load is approximately 377 N (about 60% of the 628.3 N figure), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. Be aware that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates the stroke end rather than locking the load; utilize an external rod lock or pilot-operated check valve if position holding is critical.
To finalize your order, confirm these essentials: 40 mm bore, 45 mm stroke, PT1/8 port thread, the built-in magnet (S option), and the default female M8x1.25 rod-end thread (with a male M14x1.5 option available if required).
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 1.0 MPa. The operating pressure range is 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and the operating temperature spans -20 to +70 C.
No, the piston will drift if air pressure is lost or the control valve is centered. The fixed NBR bumper at each end only serves to decelerate the piston near the stroke extremes; it does not function as a locking brake. To maintain a vertical load position without live pressure, you must install an external rod lock or a pilot-operated check valve.
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