Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40 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 SAIJ80X250-40
The AirTAC SAIJ80X250-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits up to 40 mm of travel reduction. This creates a usable 210-250 mm end-position window, enabling precise retract tuning without adding external stops. It delivers 3518 N of push force at 0.7 MPa, utilizing a 25 mm carbon steel rod and M20x1.5 thread to manage substantial side loads.
The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. SAIJ uses a specific mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. The rear adjuster acts purely as a mechanical stop for deceleration and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40 |
|---|---|
| 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 SAIJ80X250-40
| 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 SAIJ80X250-40 Is Used
Machine Changeovers
Dial in the retract position within the 210-250 mm window during product size transitions without replacing hardware.
End-Stop Calibration
Fine-tune the final end position at commissioning to perfect seating against varying workpiece tolerances.
Assembly Line Actuation
Provides 3518 N of thrust at 0.7 MPa for heavy pressing or lifting tasks requiring variable travel limits.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-40 the Right Cylinder?
Select this 80 mm bore over the smaller 63 mm (which provides 2182 N push at 0.5 MPa) when your application requires higher thrust, or step up further to the 100 mm bore (5497 N at 0.7 MPa) for heavier loads. The adjustable stroke is ideal for machine changeovers where exact end positions vary, saving the downtime of swapping a fixed-stroke SAI cylinder. For a drop-in ISO 15552 replacement, match the 250 mm stroke, 40 mm adjustment, PT tapered port, and mounting bracket.
Because the 250 mm stroke is substantial, the 25 mm rod diameter provides rigidity, but an external guide is still recommended to prevent side-load binding. Remember that the rear adjuster only sets the travel end; for true load-holding without live air, use an external rod lock or a SAIL/BSAI series 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 SAIJ80 Adjustable Cylinder SAIJ80X250-40 FAQ
At 0.7 MPa operating pressure, this 80 mm bore cylinder provides 3518 N of push force and 2268 N of pull force. It can deliver up to 4523 N push at 0.9 MPa.
The nominal stroke is 250 mm, and the rear adjuster allows you to trim the travel by up to 40 mm. This results in a usable adjustable stroke window of 210 to 250 mm for precise end-position tuning.
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