Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30
The AirTAC SAIJ125X800-30 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster, enabling a usable travel window of 770 to 800 mm. It delivers substantial thrust, pushing 8590 N and pulling 5734 N at 0.7 MPa, making it suitable for heavy-duty positioning. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The rear stopper allows precise end-position tuning during commissioning without adding external stops. Note that the adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX800-30 Is Used
Variable End-Stop Positioning
Dial in the exact 770 to 800 mm travel distance during machine setup to accommodate varying material thicknesses without swapping hardware.
Heavy-Duty Changeover
Leverage the 8590 N push force at 0.7 MPa to shift heavy pallets, then fine-tune the retract position for different product sizes on the same line.
Long-Stroke Forming
Execute extended 800 mm pressing or forming tasks where the 30 mm rear adjustment compensates for tooling wear over time.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30 the Right Cylinder?
Choose this 125 mm bore when 80 mm falls short (80 mm yields 3518 N push at 0.7 MPa) or 160 mm is excessive (160 mm yields 14074 N push). The 30 mm adjustment range is ideal for product changeovers requiring slightly varying end positions. For exact ISO 15552 dimensional interchangeability, match the 125 mm bore, 800 mm stroke, PT port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the 800 mm stroke is long, an external guide is recommended to manage side loads and prevent rod bending. If the application requires true load-holding without continuous air pressure, select the SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on the rear adjuster.
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 SAIJ125 Adjustable Cylinder SAIJ125AX800-30 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of push force and 5734 N of pull force. The maximum theoretical push force at 1.0 MPa is 1251 kgf.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 30 mm, providing a usable travel window of 770 to 800 mm. It only sets the end position and does not lock the load.
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