Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10
The AirTAC SAIJ125X950-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a robust 6136N push force at 0.5 MPa, making it suitable for heavy-duty operations. The integrated adjuster allows you to fine-tune the retract end position, creating a precise 940-950mm usable travel window without needing external stops.
This model features a carbon steel piston rod and PT tapered port threads. It utilizes variable air cushions at both ends to manage kinetic energy. Because the adjuster acts strictly as a mechanical stop and not a locking device, it cannot hold loads without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125X950-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125X950-10 Is Used
Heavy-Duty Forming
Delivers 6136N of push force at 0.5 MPa for pressing and forming tasks, with a 10mm rear adjuster to fine-tune the bottom dead center.
Product Changeover
Quickly modify the 940-950mm travel window during production line size changes without physically replacing the cylinder or adding external shims.
Automated Assembly
Handles substantial payloads in automated lines, relying on standard variable air cushions to decelerate the 125mm bore at both travel extremes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10 the Right Cylinder?
Choose this 125mm bore cylinder when an application demands high thrust, such as the 6136N push force at 0.5 MPa, alongside precise end-position tuning. If your setup requires less force, stepping down to a 100mm bore provides 3927N push force at 0.5 MPa. The adjustable stroke is ideal for machine commissioning or product changeovers, allowing you to dial in the exact 940-950mm travel window rather than machining custom spacers or swapping to a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125mm bore, 950mm stroke, 10mm adjustment range, PT G1/2 port, and mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR options. At 950mm of travel, the 32mm rod and M27x2 thread still require an external guide to prevent excessive side-loading on the extended rod.
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 SAIJ125X950-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke by up to 10mm, providing a usable travel window of 940-950mm. It is a travel stop, not a lock, and cannot hold a load without live air pressure.
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