The AirTAC AirTAC SDA40X20H Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 20mm 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 SDA40X20H is a double-acting single-rod compact cylinder engineered for tight axial spaces. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa, operating within a 0.15-1.0 MPa pressure range. This specific SKU utilizes a fluororubber (FKM) seal for enhanced thermal and oil resistance, while the bore is hard-anodized to minimize friction.
The riveted body design drastically reduces overall mounting depth compared to round-body alternatives. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, meaning operators should slow the approach speed or add external shock absorbers for high-energy loads. This unit lacks a piston magnet, so it cannot host magnetic switches without the -S option.
| Model | AirTAC SDA40X20H Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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. |
| ×20 | 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 machining. The FKM seals resist cutting fluid splash while the short 20mm stroke conserves valuable tooling envelope space.
Drives the upper platen on a medical blister packaging line. The 628.3 N output at 0.5 MPa provides consistent sealing pressure without crushing the plastic web.
Actuates a routing flap on a high-speed logistics conveyor. Its compact footprint fits neatly between the support rollers without interfering with belt travel.
When sizing this 40mm bore, step down to the SDA32 for 402.1 N of push at 0.5 MPa, or step up to the SDA50 for 981.7 N. For this H-seal variant, confirm the fluororubber compatibility with your operating environment. The 16mm rod uses a female M8x1.25 thread, air ports are PT1/8, and the 20mm stroke is well within the 130mm standard limit. A safe working load is roughly 377 N (about 60% of the 0.5 MPa figure), allowing a vertical lift of approximately 32 kg with a 2:1 margin.
Note that a standard actuator drifts when air pressure is lost or the valve is centered. The fixed bumper only softens the impact near the stroke end and does not function as a locking brake. If your application must hold a load without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
This 40mm bore double-acting cylinder provides 628.3 N push and 527.8 N pull at 0.5 MPa, and 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, proof pressure is 1.5 MPa, and speed ranges from 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You must specify the -S option to add a magnet for sensor grooves. Additionally, end stops rely on a fixed NBR bumper, not an adjustable air cushion.
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