Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100
The AirTAC SAIJ50X300-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 200-300 mm, allowing you to dial back the 300 mm nominal stroke by up to 100 mm during machine commissioning. It delivers 982 N of push force at 0.5 MPa and 1374 N at 0.7 MPa.
This variant features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered G1/4 ports. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR footprints.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 300 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 SAIJ50AX300-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×300 | 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 SAIJ50AX300-100 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 200 and 300 mm on packaging equipment without installing external physical stops or changing the cylinder.
Product Changeover Setup
Quickly adapt the stroke length on automated lines when switching between different product sizes by turning the rear adjustment screw.
Machine Commissioning
Fine-tune the end-of-stroke position during initial machine build to perfectly time the 982 N push force without machining new hard stops.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-100 the Right Cylinder?
Choose this 50 mm bore when you need 982 N push force at 0.5 MPa and a highly flexible end-position setup. The rear adjuster acts as a travel stop to fine-tune the retract distance without swapping cylinders, but it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead. To match ISO 15552 interchangeability, specify bore 50, stroke 300, 100 mm adjustment, PT G1/4 ports, and the desired mounting kit.
Because the nominal stroke is 300 mm, the 20 mm rod diameter and M16x1.5 rod thread will experience increased leverage on the piston. For long unsupported strokes like this, adding an external guide rail is recommended to prevent excessive side-loading and premature seal wear.
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 SAIJ50AX300-100 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 that lets you shorten the effective travel from 300 mm down to 200 mm. This creates a 200-300 mm adjustable window for fine-tuning the retract position at commissioning.
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