Airtac SAIJ50 Adjustable Cylinder SAIJ50BX225-30S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX225-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm 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
- Stroke225 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 SAIJ50BX225-30S
The AirTAC SAIJ50X225-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 195-225 mm usable travel window, allowing you to trim the nominal 225 mm stroke by up to 30 mm during commissioning without adding external stops. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, matching standard SAI thrust capabilities.
This variant features a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered port threads ensure a tight pneumatic seal. The rear adjuster acts purely as a travel stop for end-position tuning, not as a lock to hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX225-30S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX225-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 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 SAIJ50BX225-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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 SAIJ50BX225-30S Is Used
Machine Changeover
Dial in the 195-225 mm travel window during product size transitions to set new end positions without swapping cylinders.
End-Stop Calibration
Fine-tune the exact retract position at commissioning using the rear adjuster, avoiding the need for external mechanical stops.
Variable Position Diverter
Adjust the stroke on the fly for a pneumatic diverter arm to accommodate different package sizes on a single line.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX225-30S the Right Cylinder?
Choose this 50 mm bore when an application requires 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). An adjustable stroke is preferred over a fixed SAI cylinder when you need fine end-position tuning at commissioning or during product changeover on a line. The integrated rear stopper simplifies setup by eliminating the need to bolt on external physical stops.
For a drop-in ISO 15552 replacement, match the 50 mm bore, 225 mm stroke, 30 mm adjustment, PT port thread, and the -S magnet option. Because the 225 mm stroke exceeds 200 mm, ensure adequate external guiding to prevent rod side-loading, as the 20 mm rod diameter cannot support unsupported transverse loads. If true load-holding is required without live air, use an SAIL air-released lock or BSAI clamp-lock cylinder instead of relying on the adjuster. 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 SAIJ50BX225-30S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 1767 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the 225 mm nominal stroke by up to 30 mm, creating a 195-225 mm usable window. It functions as a travel stop for end-position tuning and does not lock or hold the load without live air pressure.
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