Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10
The AirTAC SAIJ40X280-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 270-280 mm window. Delivering 879 N of push force at 0.7 MPa, it uses a G1/4 port and a 30 mm variable air cushion at both ends to decelerate the load smoothly.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic sensors if position feedback is required later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 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 SAIJ40BX280-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SAIJ40BX280-10 Is Used
End-Stop Tuning
Dial in the exact 270 to 280 mm retract position during machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adapt the stroke end-point on a packaging line when running slightly shorter product lengths.
Corrosive Sorting
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or lightly corrosive part-sorting environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-10 the Right Cylinder?
Choose this 40 mm bore when 628 N of push force at 0.5 MPa is sufficient, stepping up to the 50 mm bore (982 N at 0.5 MPa) only if your payload increases. The 10 mm rear adjuster is ideal for dialing in exact end-positions during machine commissioning or product changeover without adding external stops, unlike a fixed-stroke SAI cylinder. Because the 280 mm stroke exceeds 300 mm when fully extended, an external guide is recommended to handle side loads and prevent rod binding.
To match this ISO 15552 dimensionally interchangeable cylinder, specify: 40 mm bore, 280 mm stroke, 10 mm adjustment, PT port threads, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and no magnet. Remember that the rear adjuster is a travel stop, not a lock; it will not hold the load without live air pressure, so for dead-pilot holding you need a SAIL lock or BSAI clamp-lock cylinder.
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 SAIJ40BX280-10 FAQ
At 0.5 MPa it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
A rear screw stopper lets you shorten the nominal 280 mm stroke by up to 10 mm, creating a 270-280 mm usable travel window. It acts as a physical stop and does not hold the load without live air pressure.
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