Airtac SDA Ultra Thin Cylinder SDA40X30-S-H
The AirTAC Airtac SDA Ultra Thin Cylinder SDA40X30-S-H 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.
- BoreØ40 mm
- Stroke30 mm
- Port sizePT1/8
- Acting typeDouble acting
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
About the Airtac SDA Ultra Thin Cylinder SDA40X30-S-H
The AirTAC SDA40X30-S-H is a double-acting compact cylinder engineered where axial space is strictly limited. Its riveted assembly unites the barrel, rear cover, piston, and rod to minimize mounting depth, delivering a robust 628.3 N push force at 0.5 MPa. This specific configuration includes a built-in piston magnet for position sensing and fluororubber (FKM) seals for enhanced thermal and oil resistance.
The 16 mm piston rod utilizes an M8x1.25 female thread, while the body features integrated sensor grooves compatible with AirTAC reed or electronic switches. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, effectively decelerating the stroke end without requiring field tuning.
Airtac SDA Ultra Thin Cylinder SDA40X30-S-H Technical Specifications
| Model | Airtac SDA Ultra Thin Cylinder SDA40X30-S-H |
|---|---|
| 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).
Theoretical Output Force (Ø40mm)
| 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.
Model Code: Airtac SDA Ultra Thin Cylinder SDA40X30-S-H
| 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).
Where the Airtac SDA Ultra Thin Cylinder SDA40X30-S-H Is Used
CNC Fixture Clamping
Secures aluminium housings during machining, using the 628.3 N extend force to hold parts rigidly against cutting forces without sprawling into the work envelope.
Carton Flap Folding
Drives mechanical arms to tuck corrugated box flaps prior to sealing, where the 30 mm stroke and FKM seals withstand dusty, warm packaging environments.
Sorter Diverter Gate
Actuates routing paddles on a parcel line, relying on the integrated magnet and a reed or electronic switch to confirm divert positions for the control system.
Is the Airtac SDA Ultra Thin Cylinder SDA40X30-S-H the Right Cylinder?
When sizing this unit, evaluate your neighbours: the SDA32 provides 402.1 N push at 0.5 MPa for lighter loads, whereas the SDA50 steps up to 981.7 N for heavier demands. For the 628.3 N output at 0.5 MPa, a safe working load is approximately 377 N (around 60 percent capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin.
Verify your ordering essentials: 40 mm bore, 30 mm stroke, PT1/8 port, female rod thread, the -S magnet, and -H FKM seals. Note that a standard actuator will drift and lose its position if air pressure drops or the valve centres; the fixed bumper only slows travel near the stroke end. To secure a suspended load mechanically, incorporate an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short-body depth vs. a round-body cylinder
- ✓ Port/thread type (PT)
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
- ✓ Side load — avoid on a compact rod
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the short piston rod.
- check Very long strokes are unsuitable for the compact body.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDA Ultra Thin Cylinder SDA40X30-S-H FAQ
This 40 mm bore double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 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, which is the maximum operating pressure.
It uses a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. If your cycle speeds are high, consider adding an external shock absorber. Furthermore, it does not hold position automatically upon air loss; you will need an external rod lock or pilot-operated check valve for secure load holding.
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