Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S
The AirTAC SAIJ125X350-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 350mm nominal stroke that can be dialed back by up to 100mm, creating a precise 250-350mm usable travel window. This built-in adjustability allows operators to fine-tune end positions at commissioning without adding external stops.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, utilizing the dual sensor grooves machined into the extruded aluminum barrel. It uses a PT tapered port and a 32mm carbon steel rod with an M27x2 thread. Because the stroke is 350mm, supporting the load with an external guide is recommended to prevent excessive side-loading on the rod.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125X350-100S Is Used
Product Changeover
Dial in the 250-350mm travel window during format size changes on a packaging line without swapping hardware.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to perfect the pressing force on large assemblies.
Variable End Stops
Adapt clamping positions dynamically for different pallet heights in heavy-duty material handling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-100S the Right Cylinder?
Choose this sizeable 125mm bore when an application requires substantial thrust, such as 6136N push at 0.5MPa, but needs less power than the 160mm bore which yields 10053N. The 100mm adjustment range is ideal for machinery handling varying product sizes, allowing rapid changeover by simply turning the rear screw instead of physically swapping cylinders. Remember that the rear adjuster functions only as a travel stop, not a lock; the SAIJ cannot hold a load without live air, so consider an AirTAC SAIL or BSAI cylinder if true load-holding is required.
To replace an ISO 15552 cylinder, match the 125mm bore, 350mm stroke, PT port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR configurations. Operating speed for this bore is 30-500mm/s.
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 SAIJ125X350-100S FAQ
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this SAIJ125X350-100-S model, you can trim the 350mm nominal stroke back by up to 100mm, providing a usable travel window of 250-350mm.
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
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