Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-50 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 SAIJ100BX250-50
The AirTAC SAIJ100X250-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel, creating a 200-250 mm usable window from its 250 mm nominal stroke. Delivering 7068 N of push force at 0.9 MPa, it handles heavy industrial loads with precision. The extruded aluminum barrel includes dual sensor grooves, though this specific configuration omits the -S magnet.
This model uses a SUS304 stainless steel rod (option B) for superior corrosion resistance and features a PT tapered port thread for reliable sealing. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning without adding external stops. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-50 |
|---|---|
| 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 SAIJ100BX250-50
| 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 SAIJ100BX250-50 Is Used
Product Changeover Tuning
Dial in the exact 200-250 mm end-stop during packaging line changeovers without swapping out the entire cylinder or adding external mechanical stops.
Machine Setup Calibration
Fine-tune the retract end position at commissioning to perfectly time heavy 7068 N press operations, ensuring precise mechanical alignment.
Variable End-Stop Forming
Adjust the stroke window on the fly for heavy-duty forming presses that process different material lengths, leveraging the robust SUS304 rod.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-50 the Right Cylinder?
Choose this 100 mm bore cylinder when a 50 mm bore (delivering 1767 N push at 0.9 MPa) is insufficient for your load, but a 125 mm bore is excessive. The 50 mm adjustable range is ideal for product changeovers on packaging lines, allowing you to dial in the exact end-stop without swapping hardware. If your application requires holding the load without live air pressure, note that the rear adjuster is a stop, not a lock; you should consider the SAIL or BSAI series instead.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard SAI footprint dimensions. To replace a cylinder, verify the 100 mm bore, 250 mm stroke, 50 mm adjustment, PT port thread, and the SUS304 rod material. For this 250 mm stroke, the 25 mm rod diameter handles standard side loads adequately, but long unsupported strokes still require an external guide to prevent premature wear.
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 SAIJ100BX250-50 FAQ
At 0.9 MPa operating pressure, this 100 mm bore cylinder provides a push force of 7068 N and a pull force of 3681 N. It can deliver a maximum push force of 801 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 250 mm nominal stroke by up to 50 mm, providing a usable travel window of 200-250 mm. It functions as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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