Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 120mm 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
- Stroke120 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 SAIJ50AX120-40S
The AirTAC SAIJ50X120-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 120 mm stroke that can be fine-tuned down by up to 40 mm, creating an exact 80-120 mm usable travel window. Delivering 982 N of push force at 0.5 MPa, it fits perfectly into mid-range pneumatic setups requiring precision end-position tuning.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 120 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 SAIJ50AX120-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×120 | 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 SAIJ50AX120-40S Is Used
Product Changeovers
Quickly dial the stroke back from 120 mm to 80 mm via the rear screw when adapting the line to different product sizes, avoiding physical cylinder swaps.
End-Position Tuning
Fine-tune the retraction point during machine commissioning to achieve exact clamping or positioning without machining custom external spacers.
Automated Assembly
Provides 982 N of thrust at 0.5 MPa for pressing or lifting tasks, while the SUS420J2 rod resists washdown environments in food or packaging plants.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40S the Right Cylinder?
Select this 50 mm bore when an application requires 982 N 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 chosen over a fixed SAI cylinder when you need to dial in the exact end-stop during commissioning or product changeovers without adding external stops. If your machine requires holding the load without live air pressure, note that the rear adjuster is a travel stop, not a lock; you should use an SAIL or BSAI cylinder instead.
For this 120 mm stroke, the 16 mm rod thread handles standard side loads adequately, but any setup exceeding 300 mm of travel requires an external guide. To match this ISO 15552 interchangeable cylinder, specify: 50 mm bore, 120 mm stroke, 40 mm adjustment, PT tapered port threads, and the -S magnet option.
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 SAIJ50AX120-40S FAQ
The rear adjuster acts as a mechanical stop that trims the effective travel. For this model, you can shorten the 120 mm nominal stroke by up to 40 mm, providing an adjustable travel window of 80 to 120 mm. It only sets the end position; it does not lock the load.
At 0.5 MPa operating pressure, the SAIJ50X120-40-S generates 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
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