Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 270mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20
The AirTAC SAIJ100X270-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 250-270 mm usable travel window by allowing you to dial back the 270 mm nominal stroke by up to 20 mm without adding external stops. In the 100 mm bore class, it generates 3927 N of push force at 0.5 MPa and 7068 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks.
This extruded aluminum profile barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. The carbon steel rod features an M20x1.5 thread, and the cylinder uses a PT tapered G1/2 port. The integrated air cushions at both ends decelerate the load, but the rear adjuster acts only as a travel stop, not a lock, so live air pressure is required to hold the load in place.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100X270-20 Is Used
Machine Changeover
Quickly fine-tune the 250-270 mm travel window during product size changeovers on a packaging line without physically remounting the actuator.
Heavy-Duty Positioning
Leverage the 7068 N push force at 0.9 MPa to move heavy pallets or fixtures into exact final positions with repeatable accuracy.
Assembly Press End-Stop
Use the rear adjuster to set precise lower limits for pressing operations, ensuring consistent depth without altering the main pneumatic circuit.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X270-20 the Right Cylinder?
Choose this 100 mm bore adjustable-stroke cylinder when your application demands high thrust (3927 N push at 0.5 MPa) alongside precise end-position tuning during commissioning or product changeover. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N of push force, whereas moving up to a 125 mm bore provides 6136 N. The SAIJ100X270-20 is selected over a fixed-stroke SAI cylinder when you need a variable end-stop to fine-tune the travel window without physically swapping the cylinder.
Because the 270 mm stroke exceeds 300 mm only marginally, standard external guiding is still recommended to manage side loads on the M20x1.5 rod. For true load-holding without continuous air pressure, this standard cylinder will not suffice; you should instead consider an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder. To match this ISO 15552 interchangeable cylinder, specify the 100 mm bore, 270 mm stroke, 20 mm adjustment, PT G1/2 port, and your preferred mounting accessory from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
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 SAIJ100 Adjustable Cylinder SAIJ100X270-20 FAQ
At 0.5 MPa, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjusting screw acts as a mechanical stop that lets you trim the effective travel back by up to 20 mm from the 270 mm nominal stroke, creating a 250-270 mm usable window. It only sets the end position and does not lock the load without live air pressure.
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