Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 275mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke275 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 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 SAIJ40 Adjustable Cylinder SAIJ40X275-30
The AirTAC SAIJ40X275-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 628N of push force at 0.5 MPa and uses a standard carbon steel piston rod with a PT tapered port thread. This model provides a usable travel window of 245 to 275mm, allowing you to dial back the nominal 275mm stroke by up to 30mm during machine commissioning.
Instead of swapping out the entire cylinder or fabricating external stops to fine-tune the retract end position, the integrated rear screw lets you set the exact travel limit on the fly. The extruded aluminum barrel includes sensor grooves on both sides, and because no magnet is specified here, you would add the -S option if you need to track position with CMSE reed or DMSE electronic sensors.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40X275-30 Is Used
Machine Commissioning
Fine-tune the 245-275mm travel window during initial setup to perfectly align tooling without machining custom spacers.
Product Changeover
Quickly adjust the retract end-position by up to 30mm on packaging lines running different package sizes.
Variable End Stops
Dial in the exact rejection distance for diverter arms on a conveyor without changing out the whole actuator.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-30 the Right Cylinder?
Choose this 40mm bore when a 32mm cylinder (providing 402N push at 0.5 MPa) lacks thrust, but a 63mm bore (1559N) would be excessive physical overkill. The adjustable 245-275mm window is perfect for applications requiring variable end-stops or frequent product-size changeovers, giving you flexibility that a fixed-stroke SAI cylinder cannot match. When replacing an ISO 15552 unit, verify the 275mm stroke, 30mm adjustment range, PT port thread, and your preferred mounting bracket from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Because the 275mm stroke is relatively long, the 16mm rod should be adequately supported by an external guide to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster functions strictly as a travel stop, not a locking device; the cylinder cannot hold a load without live air pressure, so consider an AirTAC SAIL or BSAI model if true load-holding is required.
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 SAIJ40 Adjustable Cylinder SAIJ40X275-30 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 275mm nominal stroke down to 245mm. It provides a 30mm tuning window for precise end-positioning without needing external stops.
At 0.5 MPa operating pressure, it provides 628N of push force and 528N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879N.
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Covers non-human-caused product damage.
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