Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100 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 SAIJ125X100-100
The AirTAC SAIJ125X100-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers robust thrust, pushing with 6136N and pulling with 5734N at 0.5 MPa. Because this specific SKU carries a 100mm adjustment code on a 100mm nominal stroke, it provides a fully variable usable travel window from 0 to 100mm. This allows you to fine-tune the retract end position precisely at commissioning without swapping out the entire actuator.
Unlike a fixed-stroke SAI, this model lets you dial in the exact end-stop during machine setup or product changeovers. The rear adjuster acts purely as a mechanical stop and works alongside the standard 40mm air cushions to decelerate the load; it does not hold the position without live air. The extruded aluminum barrel includes sensor grooves on both sides, though this configuration omits the internal magnet, meaning CMSE or DMSE switches cannot be used without selecting a -S variant.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100 |
|---|---|
| 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 SAIJ125X100-100
| 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 SAIJ125X100-100 Is Used
Machine Changeover
Quickly adjust the retract distance from 0 to 100mm when switching product sizes on a packaging line, avoiding the need to physically swap cylinders or reposition hard stops.
End-Position Tuning
Dial in the exact end-of-stroke location during initial commissioning to perfect a high-force pressing or forming operation without mechanical guesswork.
Variable End Stops
Provide a customizable retract stop for heavy-duty material handling equipment that must adapt to varying workpiece dimensions on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-100 the Right Cylinder?
Selecting this 125mm bore actuator makes sense when your application requires high force (up to 1251 kgf at 1.0 MPa) but variable end-positioning. If you need less force, stepping down to a 100mm bore yields 3927N push force at 0.5 MPa, while moving up to a 160mm bore provides 10053N. Choose the SAIJ adjustable design over a fixed SAI when you anticipate product size changes on your line and need to shorten the stroke on the fly rather than adding external stops.
For a direct ISO 15552 replacement match, ensure your specifications align with a 125mm bore, 100mm nominal stroke, 100mm adjustment range, PT tapered port threads, and carbon steel rod material. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. If your process requires the load to be held securely without continuous air pressure, note that this cylinder's adjuster is not a lock; you should instead explore an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder.
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 SAIJ125X100-100 FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At its maximum rated pressure of 1.0 MPa, it can deliver up to 1251 kgf of push force.
The SAIJ125X100-100 features a rear adjusting screw that allows you to trim the effective stroke by up to 100mm. Because the nominal stroke is also 100mm, the usable travel window is 0 to 100mm, letting you set the exact retract position without changing the cylinder itself.
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