Airtac SAIJ100 Adjustable Cylinder SAIJ100BX270-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX270-20S 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 SAIJ100BX270-20S
The AirTAC SAIJ100X270-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 250-270 mm, allowing you to dial back the 270 mm nominal stroke by up to 20 mm during commissioning without adding external stops. In the 100 mm bore class, it generates 3927 N of push force and 3681 N of pull force at 0.5 MPa.
This unit includes a SUS304 stainless steel rod (option B) for corrosion resistance and a magnet for position sensing. You can mount AirTAC CMSE reed or DMSE electronic sensors directly into the extruded aluminum barrel grooves. The PT tapered port and M20x1.5 rod thread provide robust connections, while the integrated air cushions handle deceleration at travel ends.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX270-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX270-20S |
|---|---|
| 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 SAIJ100BX270-20S
| 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 SAIJ100BX270-20S Is Used
Machine Changeover
Fine-tune the 250-270 mm travel window during product size changes without physically replacing the cylinder or bolting on external stopper blocks.
End-Position Tuning
Dial in the exact retract end position during commissioning to perfect timing and avoid mechanical crashes in automated assemblies.
Heavy Load Positioning
Leverage the 3927 N push force to move heavy pallets or fixtures, relying on the built-in air cushion to smoothly decelerate the load.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX270-20S the Right Cylinder?
Choose this 100 mm bore when an 80 mm cylinder (2513 N push at 0.5 MPa) lacks thrust, but a 125 mm bore (6136 N) is excessive. The adjustable stroke is ideal for product changeovers, letting you fine-tune the retract end position on the fly instead of swapping a fixed-stroke SAI cylinder. Because the 270 mm stroke exceeds 250 mm, use an external guide to support the rod and prevent side-load wear.
The rear adjuster is a travel stop, not a lock; it cannot hold a load without live air pressure. For position holding, select an SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify: 100 mm bore, 270 mm stroke, 20 mm adjust, PT port, SUS304 rod, and the -S magnet. The mounting set includes Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ100BX270-20S FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 801 kgf.
The rear adjusting screw acts as an external stopper, letting you shorten the effective travel from the 270 mm nominal stroke down to 250 mm. It sets the end position but does not lock the load without live air.
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