Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100 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 SAIJ50AX250-100
The AirTAC SAIJ50X250-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 250 mm travel by up to 100 mm, creating a highly flexible 150-250 mm usable window. This wide adjustment range is ideal for product changeovers and fine-tuning end positions at commissioning without swapping out the entire unit. It delivers a robust 982 N push force at 0.5 MPa and 1374 N at 0.7 MPa.
This model features a SUS420J2 stainless steel piston rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a travel stop to set the retract position, so it will not hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100 |
|---|---|
| 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 SAIJ50AX250-100
| 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 SAIJ50AX250-100 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within a 150-250 mm window during machine commissioning to perfect product handling without adding external mechanical stops.
Product Size Changeover
Quickly adapt the cylinder stroke on packaging lines when switching between different package sizes, using the 100 mm adjustment range to handle varied formats.
Adjustable Diverter Stroke
Modify the travel distance of a conveyor diverter arm on the fly to accommodate varying product widths without replacing the installed cylinder.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100 the Right Cylinder?
Choose this 50 mm bore when an application requires a 150-250 mm variable stroke and approximately 982 N of thrust at 0.5 MPa. If your setup needs less force, stepping down to a 40 mm bore yields 628 N; if you need more power, a 63 mm bore provides 1559 N. The 250 mm stroke on this 50 mm bore is well within standard limits, but at this length an external guide is recommended to prevent rod side-loading and premature wear.
Select the SAIJ adjustable-stroke series over a fixed SAI cylinder when you need precise end-position tuning during machine commissioning or frequent product size changes. Because the rear adjuster is a stop and not a lock, this cylinder will not hold position without live air—use an external rod lock or a SAIL pneumatic lock cylinder for true fail-safe load holding. The SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ50AX250-100 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 0.7 MPa, the push force increases to 1374 N.
The rear adjuster screw allows you to shorten the effective stroke from its 250 mm nominal length by up to 100 mm, providing a usable travel window of 150-250 mm. The adjuster acts as a mechanical stop and does not function as a lock to hold the load without air pressure.
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