Airtac SDA Ultra Thin Cylinder SDA40X40
The AirTAC Airtac SDA Ultra Thin Cylinder SDA40X40 is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port sizePT1/8
- Acting typeDouble acting
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDA Ultra Thin Cylinder SDA40X40
The AirTAC SDA40X40 is a double-acting, single-rod compact cylinder delivering 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 short unit, drastically reducing axial mounting depth compared to conventional round-body designs. The 16 mm piston rod features an M8x1.25 female thread for straightforward load coupling.
This model relies on a fixed NBR bumper at each end to decelerate the stroke, meaning it is not a field-adjustable air cushion. Operating between 0.15 and 1.0 MPa, the hard-anodized bore supports speeds of 30-500 mm/s. Note that this specific SKU lacks a piston magnet, so it cannot directly host magnetic switches without upgrading to the -S option.
Airtac SDA Ultra Thin Cylinder SDA40X40 Technical Specifications
| Model | Airtac SDA Ultra Thin Cylinder SDA40X40 |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 SDA40X40
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SDA40X40 Is Used
CNC Fixture Clamping
Secures aluminum workpieces inside CNC machining centers, utilizing the 628.3 N extend force to hold parts firmly against locators during high-speed milling.
Carton Flap Folding
Drives mechanical arms to tuck and fold corrugated cardboard flaps on automated packaging lines, where the compact 40 mm stroke fits within tight conveyor side frames.
Sorting Diverter Gate
Actuates lightweight aluminum diverter arms on parcel handling conveyors, rapidly pushing packages into chutes at speeds up to 500 mm/s.
Is the Airtac SDA Ultra Thin Cylinder SDA40X40 the Right Cylinder?
When sizing this 40 mm bore, consider stepping down to the SDA32, which yields 402.1 N of push at 0.5 MPa, or moving up to the SDA50, which provides 981.7 N at the same pressure. A practical safe working load for this SDA40X40 is roughly 377 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin.
Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the fixed rubber bumper only slows travel near the end of the stroke rather than locking the piston. If your application demands strict position holding, integrate an external rod lock or a pilot-operated check valve. To order, confirm the 40 mm bore, 40 mm stroke, PT1/8 port, female rod thread, and the absence of a magnet.
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 SDA40X40 FAQ
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You must select the SDA40X40S variant to enable sensor feedback via the body grooves.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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