Airtac SDA Ultra Thin Cylinder SDA40X30-H
The AirTAC Airtac SDA Ultra Thin Cylinder SDA40X30-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-H
The AirTAC SDA40X30-H is a double-acting single-rod compact cylinder engineered for tight machinery layouts. Its riveted assembly reduces axial mounting depth compared to round-body units, yielding a 628.3 N push and 527.8 N pull at 0.5 MPa. The -H designation specifies fluororubber (FKM) seals for upgraded thermal and oil resistance, while the hard-anodized 40 mm bore operates at 30-500 mm/s.
This unit relies on a fixed NBR bumper at each end to decelerate the stroke, meaning it is not an adjustable air cushion. Because this specific SKU lacks the -S magnet, it cannot accept magnetic switches. The 16 mm piston rod features a female M8x1.25 thread end, requiring careful alignment to prevent side loading on the compact body.
Airtac SDA Ultra Thin Cylinder SDA40X30-H Technical Specifications
| Model | Airtac SDA Ultra Thin Cylinder SDA40X30-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-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-H Is Used
Carton Erector Jaws
Provides the 628.3 N push force required to fold and seal corrugated cardboard flaps on high-speed packaging lines where FKM seals withstand warm adhesive environments.
Pallet Diverting Gate
Actuates routing gates on conveyor systems, utilizing the short riveted body to fit within restricted frame widths while handling diverting loads safely.
CNC Tool Changer Arm
Indexes tool holders in machining centers, relying on the 16 mm rod and female M8x1.25 thread to securely couple the load without excessive axial footprint.
Is the Airtac SDA Ultra Thin Cylinder SDA40X30-H the Right Cylinder?
When sizing this 40 mm bore, stepping down to the SDA32 provides 402.1 N of push force, whereas stepping up to the SDA50 yields 981.7 N at 0.5 MPa. For this 628.3 N output, a safe working load is roughly 377 N, translating to a vertical lift capacity of about 32 kg with a 2:1 safety margin. Note that a standard cylinder drifts when air is lost or a valve is centered, as the fixed bumper only decelerates near stroke end rather than locking the load; utilize an external rod lock or pilot-operated check valve for position holding. To order, confirm the 40 mm bore, 30 mm stroke, PT1/8 port, female rod thread, and FKM seal requirement.
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-H FAQ
At 0.5 MPa, this 40 mm bore cylinder outputs 628.3 N of push and 527.8 N of pull. At 0.7 MPa, push increases to 879.6 N. The theoretical maximum push is 128 kgf at the 1.0 MPa operating pressure limit.
No, this specific SKU does not include the -S piston magnet, so it cannot trigger reed or electronic switches. You would need the -S variant for position sensing, and all SDA models use a fixed NBR bumper rather than an adjustable air cushion.
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