Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S 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
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S
The AirTAC SAIJ50X250-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982 N of push force at 0.5 MPa and features a generous 100 mm adjustment range, creating a 150-250 mm usable travel window. This wide tuning band is ideal for machinery requiring significant product-size changeovers without swapping hardware.
Built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance, it includes a magnet for position sensing. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It operates at speeds of 30-800 mm/s and uses a PT tapered G1/4 port.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S |
|---|---|
| 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 SAIJ50AX250-100S
| 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 SAIJ50AX250-100S Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 150-250 mm window during machine setup to accommodate different material thicknesses without external stopper blocks.
Product Size Changeovers
Quickly reconfigure the stroke length on packaging lines handling multiple carton sizes, leveraging the full 100 mm adjustment range for rapid format changes.
Sensor-Verified Positioning
Utilize the integrated magnet with DMSE electronic sensors to confirm the adjusted end position, ensuring precise sequencing in automated assembly tasks.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-100S the Right Cylinder?
Choose this 50 mm bore when an application requires moderate thrust and a highly variable end-position. If you need less force, stepping down to a 40 mm bore yields 628 N push at 0.5 MPa; stepping up to a 63 mm bore provides 1559 N. The 100 mm adjuster allows precise commissioning tuning without adding external stops. For holding loads without live air pressure, note that this rear adjuster acts only as a travel stop, not a lock—consider an AirTAC SAIL or BSAI cylinder for positive holding.
Because the nominal stroke is 250 mm, the 20 mm rod and M16x1.5 rod thread handle standard loads well, but an external guide is recommended to prevent excessive side-loading on long extensions. This SAIJ model is dimensionally interchangeable per ISO 15552 and utilizes a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
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 SAIJ50AX250-100S 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 acts as a mechanical stop that shortens the effective stroke. For this model, the 250 mm nominal stroke can be dialed back by up to 100 mm, resulting in a usable travel window of 150-250 mm. It is a stop, not a lock, and requires live air to maintain position.
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