Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 250mm 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
- Stroke250 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 SAIJ50AX250-30
The AirTAC SAIJ50X250-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the 250 mm nominal travel by up to 30 mm. This yields a precise 220-250 mm usable window, perfect for fine-tuning end positions during commissioning without swapping hardware. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This SKU features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and PT tapered port threads (G1/4). The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for locking needs, consider the SAIL or BSAI series.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 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 SAIJ50AX250-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SAIJ50AX250-30 Is Used
Machine Changeover
Quickly reconfigure the 220-250 mm travel window when switching product sizes on a packaging line, avoiding the need to physically swap out the entire cylinder.
End-Position Tuning
Dial in the exact retracted stop during commissioning to perfect tooling alignment, absorbing mechanical tolerance stack-ups without adding external stopper blocks.
Variable End Stops
Provide adjustable physical endpoints for diverter arms or gating mechanisms on conveyors, allowing operators to tweak stroke limits on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-30 the Right Cylinder?
Choose this 50 mm bore when an application requires roughly 982 N of thrust at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). The adjustable 220-250 mm window is ideal for product changeovers on a line, whereas a fixed SAI cylinder locks you into a single exact dimension. To match this cylinder for an ISO 15552 replacement, verify the 250 mm stroke, 30 mm adjustment range, PT G1/4 port, and desired mounting style.
Because the 250 mm stroke is substantial, the 20 mm piston rod should be adequately supported by an external guide to prevent excessive side-loading and premature seal wear. The SAIJ supports a reduced mounting set of 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 SAIJ50AX250-30 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the 250 mm nominal stroke down to a minimum of 220 mm, creating a 220-250 mm usable window. It only sets the travel end and does not lock the load without continuous air pressure.
Operating at 0.5 MPa, the SAIJ50X250-30 provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 1767 N.
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Covers non-human-caused product damage.
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