Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S
The AirTAC SAIJ40X1000-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 950 to 1000 mm usable travel window. Equipped with a SUS304 stainless steel rod and a magnetic piston for position sensing, it delivers 628 N of push force at 0.5 MPa. The PT tapered port threads ensure a tight, reliable pneumatic connection.
Because the nominal 1000 mm stroke is dialed back by up to 50 mm via the rear stopper screw, you can fine-tune the end position during commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. This adjustable design omits the FB, CA, CB, and CR mounting kits, utilizing a focused set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 1000 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 SAIJ40BX1000-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×1000 | 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 SAIJ40BX1000-50S Is Used
Long-Stroke Conveyor Diverter
Dial in the 950-1000 mm travel window to precisely position a diverter arm on variable-width conveyor lines without swapping cylinders.
Machine Setup Changeover
Use the 50 mm rear adjustment to fine-tune the retract end position during format changeovers, avoiding the need to bolt on physical stop blocks.
Variable Push-Off Station
Adjust the push-back distance for different carton depths on a packaging line, relying on the 628 N thrust to move loads reliably.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX1000-50S the Right Cylinder?
Choose this 40 mm bore when an application requires roughly 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore that provides 402 N, or down from a 50 mm bore yielding 982 N. An adjustable stroke is preferred over a fixed SAI cylinder when you need to trim the end-of-travel position during product changeovers or machine setup. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an external rod lock or the SAIL and BSAI locking cylinder series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 1000 mm nominal stroke, 50 mm adjustment range, PT port threads, and the -S magnet requirement. Since this unit features a 1000 mm stroke, the 16 mm rod and M12x1.25 rod thread should be paired with an external guide to prevent excessive side-loading on the piston.
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 SAIJ40BX1000-50S FAQ
The rear stopper screw allows you to shorten the effective travel from the 1000 mm nominal stroke by up to 50 mm, providing a 950 to 1000 mm adjustable window. It acts as a mechanical stop for end-position tuning and is not a locking mechanism.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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