Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-40S 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
- 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 SAIJ50AX50-40S
The AirTAC SAIJ50X50-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 50 mm nominal travel to a precise 10-50 mm usable window. It delivers 982 N of push force at 0.5 MPa, making it a robust choice for mid-range actuation. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct switching via CMSE reed or DMSE solid-state sensors.
This model features a SUS420J2 stainless steel rod (code A) for superior corrosion resistance compared to standard carbon steel. The PT tapered port threads are G1/4, and the 20 mm rod diameter with an M16x1.5 thread provides excellent resistance to side loads. The rear adjuster acts purely as a mechanical stop to fine-tune end positions, meaning it will not hold a load without continuous air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-40S |
|---|---|
| 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 SAIJ50AX50-40S
| 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 SAIJ50AX50-40S Is Used
Product Changeovers
Dial in the exact 10 to 50 mm end-position during a production line size changeover without swapping out the physical cylinder.
Machine Setup
Fine-tune the retract stop during commissioning to perfect a 982 N press fit, avoiding the cost of custom external stops.
Variable End Stops
Adjust the travel window on the fly for testing different sensor trigger points using the integrated CMSE and DMSE switches.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX50-40S the Right Cylinder?
Choose this 50 mm bore when an application requires a variable end-stop within a compact 50 mm stroke, delivering 982 N of thrust at 0.5 MPa. If your setup needs less force, stepping down to a 40 mm bore yields 628 N; if you need more power, a 63 mm bore provides 1559 N. The adjustable stroke is ideal for product-size changeovers on a production line, eliminating the need to physically swap cylinders or bolt on external stops.
When matching an ISO 15552 replacement, verify the 50 mm stroke, 40 mm adjustment range, PT G1/4 port, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. Because the rear adjuster is a travel stop and not a locking device, use an external pilot-operated check valve or an AirTAC SAIL/BSAI cylinder if the load must be held safely without live air.
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 SAIJ50AX50-40S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 200 kgf.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the 50 mm nominal stroke by up to 40 mm, creating a usable travel window of 10 to 50 mm. It only sets the end position and does not lock or hold the load without live air pressure.
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