Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30
The AirTAC SAIJ80X275-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 245-275 mm window without adding external stops. It delivers a robust 3518 N push force at 0.7 MPa, making it well-suited for heavy positioning tasks. The piston rod is constructed from SUS420J2 stainless steel for enhanced durability against moisture.
This model uses a PT tapered G3/8 port and includes variable air cushions at both ends to manage impact deceleration. The extruded aluminum barrel features sensor grooves on both sides, though this specific SKU is configured without a magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting the FB, CA, CB, and CR styles found on some other series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80AX275-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80AX275-30 Is Used
Product Changeovers
Dial in the retract stop from 275 mm down to 245 mm instantly when switching to a shorter package size on the line.
End-Position Tuning
Fine-tune the final resting position during machine commissioning without fabricating custom external spacers.
Heavy Load Positioning
Leverage the 3518 N push force at 0.7 MPa to shift heavy pallets or tooling bases accurately into workstations.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (offering 1374 N at 0.7 MPa) lacks the necessary thrust, but a 100 mm bore (5497 N) would be excessive. The 30 mm adjustment range is ideal for product-size changeovers, allowing operators to dial in the exact end position at commissioning rather than machining custom spacers or swapping to a fixed-stroke SAI cylinder. Because the stroke is 275 mm, an external guide rail is recommended to prevent excessive side loading on the unsupported rod.
When specifying a replacement, match the 80 mm bore, 275 mm stroke, 30 mm adjustment, PT G3/8 port, and the correct mounting accessory. Remember that the rear adjuster functions strictly as a travel stop, not a lock. The SAIJ does not hold loads without live air pressure; for fail-safe load holding, select the SAIL or BSAI series instead.
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 SAIJ80AX275-30 FAQ
A rear stopper screw lets you shorten the nominal 275 mm stroke by up to 30 mm, creating an adjustable 245-275 mm travel window. The adjuster acts on the retract end to set the position, but it is a stop, not a lock, and will not hold the load without continuous air pressure.
At 0.7 MPa, it provides a push force of 3518 N and a pull force of 2268 N. It operates at speeds of 30-800 mm/s and uses a PT G3/8 port.
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