Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50
The AirTAC SAIJ125X1000-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a generous 1000 mm nominal stroke that can be dialed back by up to 50 mm, yielding a 950-1000 mm usable travel window for precise end-position tuning during commissioning. Delivering a robust 11045 N of push force at 0.9 MPa, it is built with a SUS420J2 stainless steel rod and PT tapered ports.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when optimizing machine setup. The extruded aluminum barrel features dual sensor grooves, though this specific configuration omits the magnet option, meaning CMSE reed or DMSE electronic switches cannot be used without a model change. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125AX1000-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125AX1000-50 Is Used
Long-Stroke Machining Clamps
Fine-tune the 950-1000 mm clamping reach on large fixturing blocks, ensuring precise end-position contact without adding bulky external spacers.
Product Changeover Diverter
Adjust the retract distance by up to 50 mm to accommodate varying package sizes on a long conveyor line during rapid product transitions.
Assembly Line Setup
Dial in the exact end-of-stroke position during machine commissioning to perfect part ejection over a 1000 mm travel distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-50 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust, stepping up from a 100 mm bore that provides 7068 N at 0.9 MPa. An adjustable stroke is highly advantageous here because it allows you to fine-tune the retract position across a 950-1000 mm window during product changeovers without machining new hard stops. For load-holding without continuous air pressure, this cylinder is insufficient; the rear adjuster is a stop, not a lock, so you would need to specify a SAIL or BSAI series cylinder instead.
Because this cylinder features a 1000 mm stroke, the 32 mm rod diameter and M27x2 thread will still experience significant leverage under side loads; an external guide rail is strongly recommended to prevent rod binding. This SAIJ model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) while omitting FB, CA, CB, and CR mounts.
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 SAIJ125AX1000-50 FAQ
At 0.9 MPa it provides 11045 N of push force and 5734 N of pull force. It operates at 0.15-1.0 MPa, runs at 30-500 mm/s, and uses a PT tapered G1/2 port.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from 1000 mm down to 950 mm. It sets the end position but does not lock the load without live air pressure.
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