Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-75
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-75 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 SAIJ100BX250-75
The AirTAC SAIJ100X250-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 250 mm travel that can be dialed back by up to 75 mm, yielding a usable 175-250 mm end-position window for precise machinery setup without adding external stops. Delivering 3927 N of push force at 0.5 MPa, it handles robust actuation tasks.
This variant incorporates a SUS304 stainless steel rod for superior corrosion resistance and uses a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets to streamline the adjustable rear housing design.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-75 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-75 |
|---|---|
| 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 SAIJ100BX250-75
| 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 SAIJ100BX250-75 Is Used
Machine Changeover
Dial in the exact 175-250 mm retract position during product size changeovers without swapping out the physical cylinder or adding external stopper blocks.
End-Stop Tuning
Fine-tune the final end position during initial commissioning to absorb mechanical tolerances in the fixture, ensuring precise placement of heavy components.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing environments where standard carbon steel rods would degrade.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-75 the Right Cylinder?
Selecting this 100 mm bore model is ideal when your application requires the 3927 N push force at 0.5 MPa (or 7068 N at 0.9 MPa) alongside a highly variable end-stop. If you need less force, the 80 mm bore offers 2513 N at 0.5 MPa; if you need more, the 125 mm bore provides 6136 N. Choose this adjustable SAIJ over a fixed SAI when you need to fine-tune the retract position during commissioning or product changeovers.
When matching an ISO 15552 replacement, verify the 250 mm stroke, 75 mm adjustment range, PT G1/2 port, and SUS304 rod material. Note that the rear adjuster functions strictly as a travel stop and does not hold the load without live air pressure; for true load-holding without air, consider an external rod lock, SAIL, or BSAI. Since the stroke is 250 mm, ensure adequate guidance to prevent excessive side-loading on the 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 SAIJ100BX250-75 FAQ
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 75 mm. This provides a usable travel window of 175-250 mm. It sets the travel end and deceleration, but it is not a lock and will not hold the load without live air pressure.
At 0.5 MPa operating pressure, it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N. The maximum operating pressure is 1.0 MPa.
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