Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 270mm 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
- Stroke270 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 SAIJ50BX270-20
The AirTAC SAIJ50X270-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 270 mm stroke that can be fine-tuned down by up to 20 mm, giving you a precise 250-270 mm usable travel window during commissioning. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks with ease.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE or DMSE switches later if positioning feedback becomes necessary.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 270 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 SAIJ50BX270-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×270 | 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 SAIJ50BX270-20 Is Used
Product Changeover
Dial in the 250-270 mm travel window on packaging lines to accommodate different carton sizes without changing cylinders.
End-Position Trimming
Fine-tune the retract stop during machine setup to perfect seating pressure without adding bulky external stops.
Adjustable Diverting
Vary the stroke length on a diverter arm to route different product widths accurately down the line.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX270-20 the Right Cylinder?
Choose this 50 mm bore when you need more power than a 40 mm cylinder (which provides 628 N push at 0.5 MPa) but want to avoid the bulk of a 63 mm unit. The adjustable stroke is perfect for applications requiring variable end-stops or product changeovers, saving you from swapping out a fixed-stroke SAI cylinder or adding external mechanical stops.
Because the 270 mm stroke is moderately long, ensure adequate external guiding to prevent excessive side-loading on the SUS304 rod. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify the 50 mm bore, 270 mm stroke, 20 mm adjustment, PT port, and your required mounting style from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ50BX270-20 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 270 mm down to 250 mm. This creates a 250-270 mm usable window for fine-tuning the end position at commissioning, but it acts only as a stop and does not lock the load without air pressure.
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