Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-20 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 SAIJ100BX250-20
The AirTAC SAIJ100X250-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 230 to 250 mm, allowing you to dial in the exact retract end-position during commissioning without adding external stops. Delivering 3927 N of push force at 0.5 MPa, it handles heavy loads with precision.
This variant uses a SUS304 stainless steel rod (material code B) for superior corrosion resistance. It features PT tapered ports and dual-side sensor grooves. The rear adjuster acts purely as a mechanical stop to set the travel limit and does not lock the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-20 |
|---|---|
| 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 SAIJ100BX250-20
| 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 SAIJ100BX250-20 Is Used
Product Changeovers
Fine-tune the 230-250 mm retract window during format changes on packaging lines, avoiding the need to physically swap out cylinders for different product sizes.
Heavy Clamping
Utilize the 3927 N push force at 0.5 MPa to secure heavy workpieces, using the rear stopper to precisely set the clamp position without over-travel.
Machine Setup
Dial in the exact end-of-stroke position during initial machine commissioning, absorbing mechanical tolerances directly via the cylinder's integrated adjuster.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-20 the Right Cylinder?
Choose this 100 mm bore when you need higher thrust than a 80 mm bore (which provides 2513 N push at 0.5 MPa) but want to avoid the bulk of a 125 mm unit. The 20 mm adjustment range is ideal for product changeovers on a line, letting you fine-tune the retract distance rather than swapping to a fixed-stroke SAI cylinder. To match this ISO 15552 footprint, specify the 100 mm bore, 250 mm stroke, PT ports, and your required mounting from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Because the 250 mm stroke is substantial, ensure adequate external guiding to prevent excessive side-loading on the SUS304 rod. For applications requiring the load to be held mechanically without continuous air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL or BSAI locking cylinder instead.
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 SAIJ100BX250-20 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 the maximum 1.0 MPa pressure, it can deliver up to 801 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 250 mm stroke by up to 20 mm, creating a 230-250 mm usable travel window. It only sets the end position and does not hold the load without live air pressure.
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