Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S
The AirTAC SAIJ80X250-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 250 mm stroke that can be fine-tuned backward by up to 40 mm, creating a usable travel window of 210 to 250 mm. Delivering 2513 N of push force at 0.5 MPa, this bore size is built for substantial actuation tasks.
This unit includes a magnetic piston for position sensing and uses a standard carbon steel rod with PT tapered ports. The extruded aluminum barrel features sensor grooves on both sides, accommodating AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts strictly as a mechanical stop to set the retract end position and does not hold the load without continuous air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | 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 SAIJ80 Adjustable Cylinder SAIJ80X250-40S Is Used
Changeover Calibration
Dial in the 210 to 250 mm retract position precisely when switching machinery between different product sizes.
End-Stop Tuning
Fine-tune the final resting position of tooling during initial setup without adding bulky external mechanical stops.
Variable Forming Stops
Adjust the stroke window on the fly for assembly lines processing materials of slightly varying thicknesses.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40S the Right Cylinder?
Select this 80 mm bore when an application requires more power than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full 3927 N output of a 100 mm variant. The 40 mm adjustment range is ideal for dialing in exact retract end positions during commissioning or product changeovers without swapping out the physical cylinder. For load-holding without live air pressure, a standard SAIJ will not suffice; you should explore an AirTAC SAIL or BSAI locking cylinder instead.
Because this model features a 250 mm stroke, the 25 mm diameter rod and M20x1.5 thread provide robust support, though external guiding is recommended for any heavy lateral loads. To match this ISO 15552 dimensionally interchangeable cylinder exactly, specify the 80 mm bore, 250 mm stroke, 40 mm adjustment, PT port threads, and the -S magnet option. Mounting choices include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80 Adjustable Cylinder SAIJ80X250-40S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm, providing a usable travel window of 210 to 250 mm. This mechanism acts as a travel stop and does not lock the load without live air pressure.
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