The AirTAC AirTAC SDA40X70SN Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 70mm 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 SDA40X70SN 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 merges the barrel, rear cover, piston, and rod into a highly shortened unit, saving substantial axial mounting depth where a conventional round-body actuator would simply not fit. The 40 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable low-friction operation.
This specific configuration includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body grooves, enabling precise end-of-stroke detection. End-stopping relies on a fixed NBR bumper that decelerates the piston near stroke limits; it is not a field-adjustable air cushion, so high-energy cycles may require external shock absorption. Operating speed ranges from 30-500 mm/s across a 0.15-1.0 MPa pressure range.
| Model | AirTAC SDA40X70SN Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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. |
| ×70 | 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).
Pushes a spindle carriage on an electronics PCB depaneling router, utilizing the 70 mm stroke and 628.3 N force to plunge cutting bits precisely without consuming excessive Z-axis height.
Folds minor corrugated box flaps on a continuous packaging line, where the fixed NBR bumper reliably halts the 16 mm rod at stroke end without needing external adjustment.
Presses small bronze bushings into automotive housings, applying a safe working load of roughly 377 N while the built-in magnet triggers a solid-state switch to confirm insertion depth.
When sizing this actuator, evaluate your force requirements against adjacent bores: 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 SDA40X70SN, a safe working load is approximately 377 N (about 60% of the 628.3 N capacity at 0.5 MPa), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder will drift and cannot hold a load if air pressure is lost or the valve is centered; maintaining vertical loads requires an external rod lock or a pilot-operated check valve. To finalize your order, confirm the 40 mm bore, 70 mm stroke, PT1/8 port, female rod-end thread (M8x1.25), and the required magnetic sensor option.
Quick checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628.3 N of push force and 527.8 N of pull force. At 0.7 MPa, push increases to 879.6 N. The theoretical maximum push force is 128 kgf at 1.0 MPa, with a proof pressure rating of 1.5 MPa.
No, the piston will drift if air is lost or the directional valve is centered. The fixed NBR bumper only decelerates the rod near the end of travel; it does not function as a locking brake. To maintain vertical position, you must add an external rod lock or a pilot-operated check valve.
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