Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10
The AirTAC SAIJ125X25-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers substantial thrust, pushing 8590 N at 0.7 MPa, making it suited for heavy-duty operations. A standard carbon steel rod and PT tapered port threads are built to handle rigorous industrial demands.
This model provides a usable travel window of 15-25 mm, allowing you to dial back the nominal 25 mm stroke by up to 10 mm. The external adjusting screw acts as a travel stop for fine end-position tuning at commissioning without swapping the cylinder. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAIJ125X25-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAIJ125X25-10 Is Used
Heavy-Duty Positioning
Dial in the 15-25 mm travel window to precisely set heavy clamping end-stops during machine setup without adding external stops.
Line Changeover
Quickly adjust the stroke by up to 10 mm to accommodate product-size changes on a high-force conveyor line.
Industrial Pressing
Fine-tune the end position for heavy pressing or holding tasks, relying on the 8590 N push force at 0.7 MPa.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-10 the Right Cylinder?
Choose this 125 mm bore when you need more force than the 100 mm bore, which provides 5497 N push at 0.7 MPa. The adjustable stroke is ideal for setups requiring precise variable end stops or product-size changeovers on a line, rather than relying on a fixed-stroke SAI cylinder. The rear adjuster functions strictly as a mechanical stop and does not hold the load without live air; for true load-holding without pressure, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 25 mm stroke, 10 mm adjustment, PT port thread, and standard carbon steel rod. Because this is a non-magnet model, position sensing requires adding a separate external switch rather than using integrated CMSE or DMSE sensors in the barrel groove.
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 SAIJ125X25-10 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers 11045 N push force.
The rear adjusting screw lets you shorten the effective travel from the nominal 25 mm down to 15 mm. This creates a 15-25 mm usable window, allowing you to fine-tune the end position at commissioning without replacing the cylinder.
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