Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75
The AirTAC SAIJ50X290-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 290 mm travel but allows you to dial back the retract position by up to 75 mm, creating a precise 215-290 mm usable window. Delivering 982 N of push force at 0.5 MPa, it is built with an SUS420J2 stainless steel rod for improved corrosion resistance and features PT tapered port threads.
Because this is a profile cylinder with an extruded aluminum barrel, it includes sensor grooves on both sides. However, this specific SKU is configured without a magnet, so it cannot host CMSE or DMSE electronic sensors for position detection without adding one. The rear stopper simply acts as a mechanical end-limit, meaning it will not hold a load securely without continuous live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 290 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 SAIJ50AX290-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×290 | 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 SAIJ50AX290-75 Is Used
Product Changeover
Dial in the exact end-stop for different package lengths on a packaging line, utilizing the 75 mm adjustment window to switch formats rapidly.
Machine Setup
Fine-tune the retract position during commissioning without adding external mechanical stops or changing the cylinder mounting.
Variable End Stops
Accommodate multiple part sizes in a single machining fixture by adjusting the stroke limit between 215 and 290 mm on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-75 the Right Cylinder?
Choose this 50 mm bore when an application requires moderate thrust—stepping up from a 40 mm bore (628 N push at 0.5 MPa) or down from a 63 mm bore (1559 N push). The 75 mm adjustment range is exceptionally wide, making it ideal for machines that process varying product sizes and need rapid changeovers without swapping out the physical cylinder. If you need to hold a load mid-stroke without air pressure, a standard SAIJ will not suffice; you should look at the SAIL (air-released lock) or BSAI (clamp-lock) variants instead.
For an exact ISO 15552 replacement, match the 50 mm bore, 290 mm stroke, 75 mm adjustment code, PT port thread, and SUS420J2 rod material. Since the stroke is 290 mm, the 20 mm piston rod experiences leverage forces; while the robust M16x1.5 rod thread handles side loads well, you should still use an external guide to prevent binding on longer travels. 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 SAIJ50AX290-75 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke. For this model, you can trim the 290 mm nominal travel back by up to 75 mm, yielding a usable 215-290 mm positioning window. Note that this stopper does not lock the load without live air.
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