The AirTAC AirTAC SDA40X30SB Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 30mm 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 SDA40X30SB is a double-acting, single-rod compact cylinder engineered to deliver 628.3 N of push force at 0.5 MPa. Its riveted body assembly significantly reduces axial mounting depth, making it highly effective for machinery where a standard round-body unit would occupy too much space. The 40 mm bore features a hard-anodized inner wall and operates on filtered air at 30-500 mm/s.
This specific configuration includes a built-in piston magnet (-S) for position detection using an AirTAC reed or electronic switch mounted in the body grooves. It also features a male M14x1.5 piston rod thread (-B) for secure load coupling. End-stops rely on a fixed NBR bumper that decelerates the piston near stroke limits rather than an adjustable air cushion.
| Model | AirTAC SDA40X30SB Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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. |
| ×30 | 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).
Provides compact ejection force for plastic injection molds where axial depth is restricted and the male M14x1.5 rod threads directly into the ejector plate.
Drives folding mechanisms on packaging lines, using the 628.3 N extend force to cleanly tuck carton flaps prior to sealing at cycle speeds up to 500 mm/s.
Actuates routing gates on conveyor systems, benefiting from the short riveted body to fit within tight transfer zone footprints without protruding into walkways.
When sizing this unit, stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. For the 40 mm bore at 0.5 MPa, 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. Keep in mind a plain SDA does not hold its position if air pressure drops or the valve is centered; the piston will drift. Use an external rod lock or pilot-operated check valve if the application requires load holding. Confirm your ordering essentials: 40 mm bore, 30 mm stroke, PT1/8 port, magnet included, and male M14x1.5 rod thread.
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, push is 879.6 N and pull is 738.9 N. The theoretical maximum push force is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa.
No. It uses a fixed NBR bumper at each end to decelerate the stroke, not an adjustable air cushion. Additionally, it does not hold its load if air is lost; the piston drifts. An external rod lock or pilot-operated check valve is required for position holding.
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