Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-100 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 SAIJ40X275-100
The AirTAC SAIJ40X275-100 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628 N of push force at 0.5 MPa and features a standard carbon steel piston rod with PT tapered port threading (G1/4). The built-in rear stopper allows you to dial back the 275 mm nominal stroke by up to 100 mm, creating a precise 175-275 mm usable travel window for highly variable end-position requirements.
Because this is an extruded aluminum profile cylinder rather than a tie-rod design, it integrates cleanly into standard ISO 15552 footprints. The rear screw acts purely as a mechanical travel stop to fine-tune deceleration alongside the adjustable air cushions; it does not lock the load without continuous live air pressure. For position holding, an external pilot-operated check valve or a related SAIL lock cylinder is required.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-100 |
|---|---|
| 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 SAIJ40X275-100
| 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 SAIJ40X275-100 Is Used
Product Changeover
Dial in the exact end-stop during format size changes on a packaging line without replacing the actuator.
Variable End-Stop Setup
Perfect for test fixtures where the effective stroke needs to be repeatedly trimmed back within the 175-275 mm window.
Commissioning Fine-Tune
Trim the final approach position by up to 100 mm during machine commissioning to prevent mechanical interference.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X275-100 the Right Cylinder?
Choose this 40 mm bore when an application demands a broad 175-275 mm adjustment band at commissioning or during frequent product changeovers, avoiding the need to physically swap cylinders or bolt on external stop blocks. If your setup requires less than 175 mm of travel, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa, whereas heavier loads might necessitate stepping up to a 50 mm bore for 982 N. To achieve a true ISO 15552 replacement match, verify the 275 mm stroke, 100 mm adjuster, PT port, and mounting style. Note that SAIJ supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. At 275 mm of stroke, ensure adequate external guiding to prevent excessive rod side-loading.
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 SAIJ40X275-100 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 275 mm nominal stroke by up to 100 mm, yielding a usable travel window of 175-275 mm. It sets the end position but does not hold the load without live air.
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