Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 40mm 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.
- BoreØ50 mm
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- 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 SAIJ50 Adjustable Cylinder SAIJ50BX40-40S
The AirTAC SAIJ50X40-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 0 to 40 mm. It delivers 982 N of push thrust at 0.5 MPa and 1374 N at 0.7 MPa, making it a robust choice for mid-range actuation. The integrated -S magnet enables position sensing with CMSE reed and DMSE electronic switches.
This variant uses a SUS304 stainless steel rod (code B) for superior corrosion resistance in demanding environments. The extruded aluminum barrel includes sensor grooves on both sides, and the rear stopper allows you to fine-tune the end position at commissioning without adding external stops. Fluid supply connects via PT G1/4 tapered ports.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX40-40S Is Used
Machine Changeover
Dial in the 0-40 mm travel window during product size changes on a packaging line without swapping out the entire actuator.
Precision End-Stop Tuning
Fine-tune the retract position during commissioning to dial out mechanical play and achieve exact positioning.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for reliable pushing force in washdown or chemical processing areas.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX40-40S the Right Cylinder?
Select this 50 mm bore when an application requires 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). The adjustable stroke is ideal for machine setups needing variable end-stops, whereas a fixed SAI cylinder locks you to a single 40 mm travel. The rear adjuster acts purely as a mechanical stop and does not hold the load without live air; for true load-holding, consider an external rod lock or the SAIL series.
To match this ISO 15552 replacement exactly, specify: 50 mm bore, 40 mm nominal stroke, 40 mm adjustment range, PT G1/4 ports, SUS304 rod material, and the -S magnet option. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories.
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 SAIJ50 Adjustable Cylinder SAIJ50BX40-40S FAQ
At 0.5 MPa it provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The nominal stroke is 40 mm, but the rear mechanical stopper allows you to trim the effective travel back by up to 40 mm, yielding a usable 0-40 mm window. This adjuster is a travel stop, not a lock, so it will not hold the load without live air pressure.
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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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