Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX250-40 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40
The AirTAC SAIJ80X250-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel by up to 40 mm. This creates a usable 210-250 mm stroke window, allowing you to dial in the exact retract position during commissioning without adding external stops.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this unit uses PT tapered ports and includes adjustable air cushions at both ends. The extruded aluminum barrel provides sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40 |
|---|---|
| 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40
| 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 SAIJ80BX250-40 Is Used
Machine Changeover
Dial in the 210-250 mm retract position precisely when switching between product sizes on a packaging line, avoiding physical cylinder swaps.
End-Stop Tuning
Fine-tune the final retract position during machine commissioning to perfect a pressing or clamping operation without external stop blocks.
Variable Positioning
Accommodate slight variations in part dimensions by adjusting the stroke end-point on the fly, ensuring consistent clamping force.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX250-40 the Right Cylinder?
Choose this 80 mm bore when your application requires the 2513 N pull force at 0.5 MPa, stepping up from a 63 mm bore that provides 1402 N, or down from a 100 mm bore offering 3681 N. The 40 mm adjustment range is ideal for product changeovers on a line where the retract end-stop varies, replacing the need to swap out a fixed-stroke SAI cylinder. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Since the 250 mm stroke is significant, ensure you use an external guide to prevent excessive side-loading on the M20x1.5 rod thread. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series.
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 SAIJ80BX250-40 FAQ
At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw lets you shorten the nominal 250 mm stroke by up to 40 mm, providing a usable travel window of 210 to 250 mm to fine-tune the retract end position. This adjuster is a mechanical stop, not a lock, and will not hold the load without continuous air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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