Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S
The AirTAC SAIJ80X270-40-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 4523N push force at 0.9 MPa, utilizing a 25mm carbon steel rod and PT G3/8 tapered porting to handle demanding actuation tasks.
This specific SKU provides a usable travel window of 230 to 270 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides, and because this variant includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAIJ80X270-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SAIJ80X270-40S Is Used
Machine Changeover
Fine-tune the 230-270mm travel window during product size transitions without physically replacing the cylinder or bolting on external stops.
Variable End-Stop Positioning
Dial in the exact retract position within the 40mm adjustment range to accommodate multi-format tooling on a single baseline.
Automated Clamping
Leverage the 4523N push force to secure heavy workpieces, using the rear stop to precisely set the clamping depth and prevent overtravel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-40S the Right Cylinder?
Choose this 80mm bore model when an application requires higher thrust than the 63mm option (which provides 2805N push at 0.9 MPa) but does not need the full 7068N force of the 100mm class. The adjustable stroke is ideal for variable end-stops or product-size changeovers, enabling fine-tuning at the machine without swapping the cylinder or adding external stops. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. For stroke lengths of 300mm or more, an external guide is recommended to manage side-load, but at 270mm the 25mm rod and M20x1.5 thread provide substantial rigidity. Remember that the rear adjuster is a travel stop, not a lock; the cylinder will not hold a load without live air, so consider SAIL or BSAI for true load-holding needs.
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 SAIJ80X270-40S FAQ
At an operating pressure of 0.9 MPa, this 80mm bore cylinder generates a push force of 4523N and a pull force of 3681N. It can deliver up to 513 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 270mm nominal stroke down to 230mm. This allows precise end-position tuning at commissioning without altering the cylinder body.
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