Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 155mm 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
- Stroke155 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 SAIJ50AX155-40
The AirTAC SAIJ50X155-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 155 mm travel by up to 40 mm. This creates a precise 115-155 mm usable window, ideal for fine-tuning end positions during commissioning without swapping hardware. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This variant features a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit lacks the internal magnet, meaning position sensing via CMSE or DMSE switches is not supported without modification.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 155 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 SAIJ50AX155-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×155 | 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 SAIJ50AX155-40 Is Used
Machine Changeover
Quickly reconfigure the retract distance across a 115-155 mm window when switching a packaging line to a different product size.
End-Position Tuning
Fine-tune the exact endpoint during machine commissioning to avoid hard mechanical crashes without machining new spacers.
Variable Forming Stops
Adjust the depth of a pressing or forming operation on the fly to accommodate material thickness variations.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-40 the Right Cylinder?
Choose this 50 mm bore when an application demands moderate thrust—delivering 982 N push at 0.5 MPa—stepping up from a 40 mm bore (628 N) if extra force is needed, or dropping down if a smaller 32 mm bore (402 N) suffices. The 40 mm adjustment range is selected when a process requires significant product-size changeover flexibility, allowing the retract end-stop to move across a 115 to 155 mm window. Unlike a fixed-stroke SAI cylinder, this rear screw lets you trim travel mechanically without adding external stops.
For ISO 15552 replacement matching, confirm the 50 mm bore, 155 mm stroke, 40 mm adjustment, PT G1/4 port, and the absence of a magnet (-S). Because the stroke is 155 mm, side-load risks are moderate, but always guide the load externally for long unsupported travels. Remember that the rear adjuster acts only as a travel stop; it will not hold the load without live air. For true load-holding, consider the SAIL or BSAI series.
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 SAIJ50AX155-40 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 screw acts as a mechanical stop, allowing you to shorten the effective stroke from its nominal 155 mm down to 115 mm. This creates a 115-155 mm adjustable travel window for fine-tuning the retract position without replacing the cylinder.
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