Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 250mm 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.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75
The AirTAC SAIJ100X250-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel anywhere within a 175 to 250 mm window. Utilizing a 100 mm bore, it delivers a robust 3927 N of push force at 0.5 MPa and up to 7068 N at 0.9 MPa. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback.
This model features a standard carbon steel piston rod with an M20x1.5 thread, paired with a PT tapered G1/2 port. The rear adjustment screw acts purely as a mechanical stop to set the end position during commissioning; it does not lock the load without continuous air pressure. For load-holding requirements, an external rod lock or the AirTAC SAIL series is recommended.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SAIJ100 Adjustable Cylinder SAIJ100X250-75 Is Used
Machine Setup Changeover
Dial in the exact end-position during product size changeovers using the 75 mm rear adjustment screw, avoiding the need to physically swap out cylinders on the line.
Variable End-Stop Positioning
Provides a customizable 175 to 250 mm travel window for diverter arms or gating mechanisms that must adapt to different package dimensions on the fly.
Heavy-Duty Clamping
Leverages the 100 mm bore's 7068 N push force at 0.9 MPa to securely clamp large workpieces, while the adjuster fine-tunes the clamping depth precisely.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-75 the Right Cylinder?
Choose this 100 mm bore cylinder when an application requires substantial thrust, such as 3927 N at 0.5 MPa, but demands on-site travel flexibility. If you need less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa. The 75 mm adjustment range is ideal for product changeovers on a line, allowing you to dial in the end-stop without swapping the cylinder or adding external stops. Unlike a fixed-stroke SAI cylinder, the SAIJ simplifies mechanical setup.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 250 mm nominal stroke, PT port thread, and mounting style. SAIJ supports a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because this unit lacks the -S magnet option, it does not support AirTAC CMSE or DMSE sensors. Furthermore, with a 250 mm stroke, ensure external guides are used to manage side loads and protect the 25 mm rod.
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 SAIJ100 Adjustable Cylinder SAIJ100X250-75 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 75 mm from the nominal 250 mm, creating a 175 to 250 mm usable travel window. It only sets the end position and does not hold the load without live air pressure.
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