Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S
The AirTAC SAIJ50X50-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 982N push force at 0.5 MPa and provides a usable travel window of 20 to 50mm by trimming the nominal 50mm stroke up to 30mm. This built-in adjustability allows precise end-position tuning at commissioning without swapping out the cylinder.
This model includes a magnet for position sensing via CMSE reed or DMSE electronic switches. It uses a standard carbon steel rod and features extruded aluminum barrel sensor grooves on both sides. The rear adjuster acts purely as a travel stop for deceleration, so it will not hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAIJ50X50-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SAIJ50X50-30S Is Used
Changeover Calibration
Dial in the exact 20-50mm travel window during machine setup to accommodate new product dimensions without changing hardware.
Variable End-Stop Positioning
Fine-tune the retract end-position at commissioning using the rear screw, preventing the need for external mechanical stops.
Assembly Line Actuation
Provide 982N of push force at 0.5 MPa for pressing or lifting tasks while retaining the flexibility to adjust the stroke on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50X50-30S the Right Cylinder?
Choose this 50mm bore when an application requires higher thrust than a 40mm bore (628N at 0.5 MPa) but does not need the full capacity of a 63mm bore (1559N at 0.5 MPa). The 30mm adjustment range is ideal for product changeovers on a line, letting operators dial in the exact 20-50mm end-stop without adding external stops. For true load-holding without continuous air pressure, consider the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 50mm bore, 50mm stroke, 30mm adjustment, PT tapered port threads, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is under 300mm, side-load concerns are minimal, though the 20mm rod and M16x1.5 thread handle standard stresses well.
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 SAIJ50X50-30S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder generates 982N of push force and 825N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster screw allows you to shorten the effective travel from its nominal 50mm down to 20mm. This creates a 20-50mm usable window for fine-tuning the end position at commissioning, but the adjuster acts only as a stop and does not lock the load without live air.
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