Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S
The AirTAC SAIJ125X100-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring an integrated rear stroke adjuster. It provides a nominal 100 mm stroke that can be fine-tuned backward by up to 30 mm, creating a precise 70-100 mm usable travel window for product size changeovers. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, it is built for heavy-duty positioning. The standard carbon steel rod and PT tapered port threads ensure robust mechanical and pneumatic connections.
Because this configuration includes the -S magnet option, it directly supports AirTAC CMSE reed and DMSE solid-state electronic sensors mounted in the dual-side sensor grooves of the extruded aluminum barrel. The rear adjuster acts strictly as a mechanical stop to set the end position and works in tandem with the 40 mm air cushions at both ends to decelerate the load. It does not lock the load; for position holding without live air pressure, you must use an external pilot-operated check valve or select a SAIL or BSAI series cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-30S Is Used
Variable End-Stop Forming
Dial in the exact 70 to 100 mm travel distance required for pressing different material thicknesses without changing the cylinder setup.
Machine Changeover
Quickly adjust the rear stopper during product size transitions on a packaging line to accommodate new carton dimensions.
Heavy-Duty Clamping
Leverage the 6136 N push force at 0.5 MPa to securely hold large workpieces while the adjuster sets the precise clamp position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30S the Right Cylinder?
Select this 125 mm bore when your application requires substantial thrust—stepping down to a 100 mm bore drops your 0.5 MPa push force to 3927 N, while stepping up to a 160 mm bore increases it to 10053 N. Choose this adjustable-stroke SAIJ model over a fixed-stroke SAI cylinder when you need on-the-fly end-position tuning during commissioning or when accommodating varying product sizes on a machinery line without swapping out the entire actuator.
When matching this ISO 15552 cylinder for a replacement, verify the 125 mm bore, 100 mm nominal stroke, 30 mm adjustment range, PT G1/2 port, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. Although the 100 mm stroke is short, the 32 mm rod diameter provides excellent rigidity against side loads; for longer strokes, always use an external guide rail to prevent rod binding.
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 SAIJ125X100-30S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 1251 kgf.
The rear mechanical stopper allows you to shorten the nominal 100 mm stroke by up to 30 mm, providing a usable travel window of 70 to 100 mm. This adjuster sets the end position and works with the air cushions to decelerate the load, but it does not lock the load without live air pressure.
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