Airtac SDA Ultra Thin Cylinder SDA40X20
The AirTAC Airtac SDA Ultra Thin Cylinder SDA40X20 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.
- BoreØ40 mm
- Stroke20 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 SDA40X20
The AirTAC SDA40X20 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 axial package, drastically reducing mounting depth where a conventional round-body unit would protrude too far into the machine envelope.
This specific configuration features a 16 mm piston rod and female M8x1.25 rod-end thread, operating via PT1/8 ports. End-stop deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators should externally slow high-velocity approaches or bolt on a shock absorber for heavy loads. Because this base SKU lacks the -S magnet, it cannot host AirTAC reed or electronic switches.
Airtac SDA Ultra Thin Cylinder SDA40X20 Technical Specifications
| Model | Airtac SDA Ultra Thin Cylinder SDA40X20 |
|---|---|
| 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).
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 SDA40X20
| 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).
Where the Airtac SDA Ultra Thin Cylinder SDA40X20 Is Used
PCB Router Gantry
Actuates the Z-axis plunge on a printed circuit board depaneling router, utilizing the short 20 mm stroke and compact body to minimize gantry interference.
Carton Flap Folder
Drives the side flap folding mechanism on a continuous motion case erector, applying 628.3 N of extend force to square heavy corrugated board.
Injection Mold Ejector
Provides a secondary robotic knock-out push for a 32 kg plastic injection molded part, safely operating well within the 377 N safe working load limit.
Is the Airtac SDA Ultra Thin Cylinder SDA40X20 the Right Cylinder?
When sizing this 40 mm bore, 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 this SDA40X20, the safe working load is approximately 377 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. Confirm your ordering essentials: 40 mm bore, 20 mm stroke, PT1/8 port, female rod thread, and no sensor magnet.
Keep in mind that a standard compact cylinder drifts when air pressure drops or the directional valve centers. The fixed NBR bumper only softens the impact near the stroke endpoint rather than locking the payload. If your fixture must maintain vertical position without live pressure, integrate 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 SDA40X20 FAQ
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, the push force is 879.6 N and the pull force 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 speed of 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot host AirTAC reed or electronic switches. You would need to order the SDA40X20S variant for sensing capabilities. Additionally, end stopping is handled by a fixed NBR bumper, not an adjustable air cushion.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SDA Ultra Thin Cylinder SDA40X20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.