Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S
The AirTAC SAIJ125X45-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 45mm nominal stroke that can be fine-tuned down by up to 10mm, creating a usable travel window of 35-45mm. This built-in adjustability allows you to dial in the exact end position during commissioning without needing external stops.
This variant includes a magnetic piston (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, which seat cleanly into the sensor grooves on both sides of the extruded aluminum barrel. It uses a carbon steel rod with an M27x2 thread and PT tapered ports. The rear adjuster acts purely as a travel stop for deceleration and positioning; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAIJ125X45-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAIJ125X45-10S Is Used
Short-Stroke Pressing
Provides 6136N of precise pressing force for assembling heavy components, with the 10mm adjuster allowing you to compensate for material thickness variations on the fly.
Machine Changeover
Quickly fine-tune the 35-45mm travel end-stop during product size changeovers without swapping out the entire cylinder or re-engineering external stop blocks.
Heavy End-Positioning
Ideal for moving heavy payloads into exact detent positions, using the robust M27x2 threaded carbon steel rod to handle significant mechanical loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10S the Right Cylinder?
Choose this 125mm bore when you need substantial thrust—such as the 6136N push or 5734N pull at 0.5MPa—but require a short, highly precise end-position. If your application needs less force, stepping down to a 100mm bore yields 3927N push force. The adjustable 35-45mm window is ideal for machine setups requiring product changeovers, whereas a fixed SAI cylinder is better for repetitive single-stroke tasks. For load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead of relying on this stopper.
To match this ISO 15552 cylinder for a replacement, verify the 125mm bore, 45mm stroke, 10mm adjustment range, PT port threads, and the -S magnet option. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X45-10S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. At a maximum 1.0MPa, it can deliver up to 1251kgf.
The rear adjuster screw allows you to shorten the 45mm nominal stroke by up to 10mm, providing an effective travel window of 35-45mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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