The AirTAC AirTAC SDA40X90 Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 90mm 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 SDA40X90 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 assembly securely joins the barrel, rear cover, piston, and 16 mm rod, drastically reducing axial mounting depth compared to round-body alternatives. This space efficiency makes it highly suitable for machinery where footprint reduction is critical.
This specific configuration features a 90 mm stroke and a PT1/8 port. The internal bore is hard-anodized and uses a two-way piston seal for reliable operation across a 30-500 mm/s speed range. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be added for high-energy cycles. This base SKU lacks a piston magnet, so it cannot host magnetic position switches.
| Model | AirTAC SDA40X90 Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 90 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. |
| ×90 | 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 molding machines, utilizing the 628.3 N push capacity to safely strip finished parts from tight mold cavities.
Drives the mechanical flap folders on automated corrugated box erecting lines, where the shortened body length prevents interference with adjacent conveyor guides.
Actuates routing gates on pallet handling conveyors, using the 90 mm stroke to clear the path for downstream packaging stations without occupying excessive frame depth.
When sizing this actuator, stepping down to the SDA32 yields 402.1 N of push force at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N at the same pressure. For the SDA40X90 specifically, 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. Keep in mind that a standard compact 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; an external rod lock or pilot-operated check valve is required for strict position holding.
To finalize your order, confirm the essentials: 40 mm bore, 90 mm stroke, PT1/8 port, female M8x1.25 rod-end thread (or male M14x1.5 if specified with a B option), and no sensor magnet for this base model.
Quick checklist
The SDA40X90 generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum push force is 128 kgf at 1.0 MPa. It operates between 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and supports a speed range of 30-500 mm/s.
This specific SKU does not include a piston magnet, so it cannot support reed or electronic switches; you must specify the -S option for sensing capabilities. Additionally, it uses a fixed NBR bumper at each end for end-stop deceleration rather than an adjustable air cushion, so external shock absorbers are recommended for high-speed applications.
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