Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40 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 SAIJ100BX250-40
The AirTAC SAIJ100X250-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 250 mm travel by up to 40 mm. This creates a usable 210-250 mm end-position window, letting you fine-tune machine stops at commissioning without swapping hardware. Built with a SUS304 stainless steel rod, it provides high corrosion resistance and handles heavy loads with 7068 N of push force at 0.9 MPa.
The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Fluid is filtered 40 um air, operating pressure ranges from 0.15 to 1.0 MPa, and variable air cushions at both ends manage deceleration. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40 |
|---|---|
| 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 SAIJ100BX250-40
| 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 SAIJ100BX250-40 Is Used
Product Changeovers
Dial in the 210-250 mm travel window during format changes to accommodate different product sizes without retooling the entire machine.
Machine Setup
Fine-tune the exact end-stop position during commissioning using the rear screw, avoiding the need to swap out a fixed-stroke SAI cylinder.
Heavy Forming Stops
Leverage the 7068 N push force at 0.9 MPa for pressing applications while relying on the adjustable stop to prevent over-travel.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40 the Right Cylinder?
Choose this 100 mm bore when you need substantial thrust, delivering 5497 N push at 0.7 MPa. If your application requires less force, stepping down to an 80 mm bore yields 3518 N at the same pressure. The adjustable stroke is ideal for product changeovers on a line, allowing variable end-stops without adding external stops. For load-holding without live air pressure, select a SAIL or BSAI cylinder instead, as this adjuster is not a lock.
This model uses PT tapered ports (G1/2) and an M20x1.5 rod thread. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 250 mm stroke is relatively long, ensure external guides are used 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 SAIJ100BX250-40 FAQ
The rear adjuster screw lets you shorten the effective travel by up to 40 mm from the 250 mm nominal stroke, providing a usable window of 210-250 mm. This allows precise end-position tuning without changing the cylinder.
At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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