Airtac SAIJ50 Adjustable Cylinder SAIJ50BX55-30S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX55-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 55mm 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
- Stroke55 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 SAIJ50BX55-30S
The AirTAC SAIJ50X55-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 982N of push force at 0.5 MPa. With a nominal 55mm stroke and a 30mm adjustment range, it provides a highly customizable usable travel window of 25-55mm. This allows precise end-position tuning at commissioning without swapping out the entire cylinder. The extruded aluminum barrel features sensor grooves on both sides, and this configuration includes a SUS304 stainless steel rod and a magnet for position sensing.
Because the rear adjuster acts strictly as a mechanical stop and works alongside the standard air cushions to manage deceleration, it does not hold the load without live air pressure. For applications requiring true load-holding without continuous pressure, consider the SAIL or BSAI variants. This -S model supports AirTAC CMSE reed and DMSE electronic solid-state sensors, while the PT tapered ports ensure a secure pneumatic connection.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX55-30S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX55-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 55 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 SAIJ50BX55-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×55 | 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 SAIJ50BX55-30S Is Used
Product Changeovers
Quickly dial in the 25-55mm travel window during format changes on packaging lines without adding external stopper blocks.
End-Position Tuning
Fine-tune the retract end-point during machine commissioning to achieve precise seating of components under the 982N thrust.
Sensor-Driven Sorting
Leverage the integrated magnet with DMSE electronic sensors to confirm part ejection positions across the adjusted stroke range.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX55-30S the Right Cylinder?
Selecting this 50mm bore cylinder makes sense when you need the 982N push force at 0.5 MPa but require variable end-stops for product changeovers on a line. If your setup only requires 528N of pull force, a 40mm bore might suffice, but stepping up to this 50mm profile provides a stiffer 20mm rod and M16x1.5 thread to better handle side loads. The adjustable stroke is chosen over a fixed SAI cylinder when fine-tuning the retract position is necessary during machine setup. To match this exact ISO 15552 replacement, specify a 50mm bore, 55mm stroke, 30mm adjustment, PT ports, SUS304 (B) rod material, and the -S magnet option.
Since the nominal stroke is 55mm, external guides are less critical than on long-stroke models, but always ensure the load is adequately supported to prevent binding. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR configurations.
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 SAIJ50BX55-30S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its 55mm nominal length down to 25mm, creating a 25-55mm usable travel window. It functions as a stop for end-position tuning and does not lock the load without live air.
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