Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 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 SAIJ50AX400-40S
The AirTAC SAIJ50X400-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 360 to 400 mm. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it well-suited for moderate-load positioning tasks. This variant includes a magnet for position sensing and features a SUS420J2 stainless steel rod for enhanced corrosion resistance.
The external adjusting screw acts as a mechanical stop to fine-tune the retract end-position during commissioning or product changeovers without swapping the cylinder. It is important to note that this adjuster and the variable air cushions only decelerate the travel end; neither will hold a load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 SAIJ50AX400-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 SAIJ50AX400-40S Is Used
Product Changeovers
Dial in the stroke from 360 to 400 mm during line format changes to accommodate varying package sizes without replacing hardware.
End-Stop Calibration
Fine-tune the retract position during machine commissioning using the rear adjuster to achieve exact mechanical spacing.
Dynamic Diverter
Adjust the travel end on a sorting diverter arm to handle different product profiles on the fly without adding external stops.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX400-40S the Right Cylinder?
Choose this 50 mm bore model when an application requires a 400 mm stroke that needs precise end-position tuning within a 360-400 mm window. If your process demands higher force, stepping up to the 63 mm bore yields 1559 N of push force at 0.5 MPa. Conversely, lighter duties can drop to the 40 mm bore providing 628 N. Because the 400 mm stroke is relatively long, an external guide is recommended to prevent excessive side-load on the rod.
An adjustable-stroke SAIJ is selected over a fixed SAI when machine setups require variable end-stops or product-size changeovers. This specific SKU is dimensionally interchangeable per ISO 15552 mounting interfaces and ships configured with a PT tapered port, SUS420J2 rod material, and a magnet (-S) compatible with CMSE reed and DMSE electronic sensors. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ50AX400-40S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 1767 N of push force at 0.9 MPa.
The rear adjusting screw acts as a mechanical stop that allows you to trim the effective travel back by up to 40 mm. This creates a usable stroke window of 360 to 400 mm, which can be fine-tuned during commissioning without swapping the cylinder.
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