Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-40S 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 SAIJ100X250-40S
The AirTAC SAIJ100X250-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. Its 250mm nominal stroke can be dialed back by up to 40mm, creating a precise 210-250mm usable travel window. This built-in adjustability allows operators to fine-tune end positions during commissioning or product changeovers without swapping the cylinder or adding external stops.
Featuring a carbon steel piston rod and PT tapered port threads, this model includes a magnet (-S) for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It utilizes variable air cushions at both ends for end-of-stroke deceleration, while the mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-40S |
|---|---|
| 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 SAIJ100X250-40S
| 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 SAIJ100X250-40S Is Used
Product Changeover
Quickly dial in the 210-250mm travel window when switching a packaging line to a different carton size, eliminating the need to physically swap cylinders or add external shims.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to achieve exact material press depths, using the rear screw to perfect the end stop without changing the fixed 250mm stroke length.
Heavy Forming Operations
Leverage the 3927N push force at 0.5 MPa for stamping or pressing tasks, relying on the robust 25mm carbon steel rod to handle significant loads with adjustable end positioning.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X250-40S the Right Cylinder?
Select this 100mm bore cylinder when an application requires substantial thrust—such as 3927N push or 3681N pull at 0.5 MPa—combined with variable end-stop positioning. If your setup demands less force, stepping down to an 80mm bore yields 2513N push force, whereas moving up to a 125mm bore provides 6136N. The adjustable stroke is ideal for machines processing multiple product sizes, allowing the retract end position to be set on the fly instead of machining custom spacers.
For a direct ISO 15552 replacement match, ensure your specifications call for a 100mm bore, 250mm nominal stroke, 40mm adjustment range, PT port threads, and a magnet for sensors. Because the 250mm stroke exceeds 300mm only slightly, side-load risks are moderate, but external guides should still be used for heavy off-center loads. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ100X250-40S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The rear adjuster screw acts as a mechanical stop that allows you to shorten the effective stroke from its 250mm nominal length down to a minimum of 210mm. This creates a 210-250mm usable travel window for fine-tuning end positions, though it functions only as a stop and does not lock the load without continuous air pressure.
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