Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30S 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 SAIJ80X250-30S
The AirTAC SAIJ80X250-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 30 mm. This yields a usable stroke window of 220-250 mm, letting you dial in the exact end position at commissioning without swapping out the barrel. It delivers a robust 4523N of push force at 0.9 MPa, making it well-suited for heavy positioning tasks.
Equipped with a -S magnet, this unit supports position detection via AirTAC CMSE reed switches or DMSE solid-state electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting. It uses a standard carbon steel rod with PT tapered port threading, and the SAIJ mounting set omits FB, CA, CB, and CR brackets, focusing on Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30S |
|---|---|
| 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 SAIJ80X250-30S
| 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 SAIJ80X250-30S Is Used
Machine Setup & Changeover
Fine-tune the 220-250 mm travel window during machine commissioning or product size transitions to perfectly set the retract end-position without replacing hardware.
Variable End-Stop Positioning
Adjust the rear stopper on the fly to accommodate different package sizes or pallet depths on a processing line, ensuring precise physical positioning.
Heavy-Duty Clamping
Leverage the 4523N push force at 0.9 MPa to securely clamp heavy workpieces, while using the 30 mm adjustment range to dial in the exact clamping depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X250-30S the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI cylinder when your machine setup requires variable end-stops or frequent product changeovers that demand fine-tuning without adding external stops. If your application needs less force, stepping down to a 63 mm bore yields 2805N of push at 0.9 MPa. For heavier loads, a 100 mm bore provides 7068N.
Because the nominal stroke is 250 mm, ensure proper external guidance to prevent excessive side-loading on the 25 mm rod. Remember that the rear adjuster acts purely as a mechanical stop for deceleration; it does not hold the load without live air pressure. For fail-safe load holding, consider the SAIL pneumatic lock or BSAI clamp-lock series instead. This cylinder is dimensionally interchangeable per ISO 15552 mounting-interface dimensions.
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 SAIJ80X250-30S FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523N of push force and 4071N of pull force. It can deliver a maximum push force of 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the nominal 250 mm stroke by up to 30 mm, creating a usable travel window of 220-250 mm. This mechanical stop fine-tunes the retract end-position but does not lock the load without continuous air pressure.
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