Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-40 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 SAIJ125AX800-40
The AirTAC SAIJ125X800-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 760-800mm usable travel window, allowing you to dial back the 800mm nominal stroke by up to 40mm during commissioning. Delivering 6136N of push force at 0.5 MPa, it handles heavy-duty positioning with precision.
This model uses a SUS420J2 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic solid-state switches if a magnet is added later. The rear adjuster acts purely as a mechanical stop to fine-tune the end position, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-40 |
|---|---|
| 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 SAIJ125AX800-40
| 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 SAIJ125AX800-40 Is Used
Long-Stroke Positioning
Ideal for heavy-duty automated lines needing a 760-800mm travel window, allowing precise end-stop tuning during initial machine setup.
Product Changeover
Enables rapid adjustment of the retract end-position by up to 40mm when conveyor product sizes or formats change on the fly.
Assembly Actuation
Provides 6136N of thrust for pushing or lifting heavy components, with fine-tuning to dial out mechanical interference at the travel end.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-40 the Right Cylinder?
Choose this adjustable-stroke model when an 800mm travel requires exact end-position tuning without adding external stops or swapping cylinders. It delivers 6136N push and 5734N pull at 0.5 MPa; if your application needs less force, a 100mm bore provides 3927N push, while stepping up to a 160mm bore yields 10053N. The 125mm bore uses a G1/2 port and operates at 30-500 mm/s.
Because the 800mm stroke is long, an external guide is recommended to prevent excessive side-loading on the 32mm rod and M27x2 rod thread. This cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). It does not hold loads without live air pressure; 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 SAIJ125 Adjustable Cylinder SAIJ125AX800-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. The maximum operating pressure is 1.0 MPa.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from 800mm down to 760mm. It fine-tunes the retract end position but does not lock or hold the load without continuous air pressure.
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