Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 240mm 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
- Stroke240 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 SAIJ50AX240-40
The AirTAC SAIJ50X240-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 240 mm stroke that can be fine-tuned down by up to 40 mm, creating a precise 200-240 mm usable travel window. Delivering 982 N of push force at 0.5 MPa, it is built to handle mid-range automation tasks with reliable variable air cushions at both ends.
This specific configuration utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, allowing for direct mounting of CMSE reed or DMSE electronic switches if a magnet is added later. Fluid must be filtered to 40 um, operating safely within a 0.15-1.0 MPa pressure range.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 240 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 SAIJ50AX240-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 SAIJ50AX240-40 Is Used
Product Changeover
Quickly dial the retract stroke back by up to 40 mm to accommodate different package lengths on a packaging line without changing the cylinder.
End-Position Tuning
Fine-tune the final resting position during machine commissioning to achieve exact alignment without machining external hard stops.
Adjustable Diverting
Set precise diverting distances on conveyor systems where product sizes vary, using the 200-240 mm travel window to adapt on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-40 the Right Cylinder?
Choose this 50 mm bore when an application requires approximately 982 N of thrust at 0.5 MPa; stepping down to a 40 mm bore reduces push force to 628 N, while an 80 mm bore increases it to 2513 N. The 40 mm adjustment range is ideal for machine setups requiring product-size changeovers, allowing operators to dial in the retract end-position without swapping cylinders or adding external stops. Since the stroke is 240 mm, ensure adequate external guiding to prevent excessive rod side-loading on long unsupported loads.
When specifying a replacement, verify the 50 mm bore, 240 mm nominal stroke, 40 mm adjuster, PT tapered port threads, and the SUS420J2 rod material. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ50AX240-40 FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At a maximum 1.0 MPa operating pressure, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from its nominal 240 mm down to 200 mm. It is a travel stop, not a lock, meaning the cylinder requires live air to maintain its position.
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