Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 20mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke20 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10
The AirTAC SAIJ40X20-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 10 to 20mm usable travel window, allowing you to fine-tune the retract end position at commissioning without adding external stops. This 40mm bore delivers 628N of push force at 0.5 MPa and uses a PT tapered port thread.
Equipped with a SUS304 stainless steel rod (option B), it handles demanding environments better than standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed and DMSE electronic sensors if a magnet is added later. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 SAIJ40 Adjustable Cylinder SAIJ40BX20-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 Is Used
Precision Clamping
Dial in the exact clamping position on variable-sized parts using the 10 to 20mm travel window during machine setup.
End-Stop Tuning
Fine-tune the retract position at commissioning without swapping the cylinder or bolting on external mechanical stops.
Changeover Adjustments
Quickly adapt automated lines for new product dimensions by adjusting the rear stopper screw on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 the Right Cylinder?
Choose this 40mm bore when you need 628N of push force at 0.5 MPa, stepping up from a 32mm bore that provides 402N. The 10mm adjustment range is ideal for applications requiring exact end-position tuning during product changeover rather than a fixed stroke. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For load-holding, select a SAIL or BSAI cylinder.
To match this ISO 15552 interchangeable cylinder, specify a 40mm bore, 20mm nominal stroke, 10mm adjustment, PT port, and SUS304 rod material. Because the nominal stroke is only 20mm, side-loading is minimal, but always ensure the load is guided to prevent rod binding.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
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 piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX20-10 FAQ
At an operating pressure of 0.5 MPa, this 40mm bore cylinder generates 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw lets you shorten the 20mm nominal stroke by up to 10mm, creating a 10 to 20mm usable travel window. It functions as a mechanical stop and does not lock the load without live air pressure.
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