Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S
The AirTAC SAIJ100X275-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3927N push force at 0.5MPa and features a SUS304 stainless steel rod for superior corrosion resistance. With a 275mm nominal stroke and a 50mm adjustment range, you can dial the effective travel down to a precise 225mm window during commissioning without adding external stops.
This extruded aluminum barrel design includes sensor grooves on both sides for CMSE reed and DMSE electronic solid-state switches. The rear screw acts purely as a mechanical stop to fine-tune the retract end position and does not lock the load without live air pressure. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA options.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 275 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 SAIJ100BX275-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX275-50S Is Used
Product Changeover
Dial in the exact end position for different product sizes on a single line by adjusting the rear stopper from 275mm down to 225mm without changing hardware.
Commissioning Fine-Tune
Trim the retract stroke precisely during machine setup to avoid mechanical crashes, using the 50mm adjustment window to perfect the end stop.
Heavy Assembly Press
Leverage 3927N of push force at 0.5MPa to seat heavy components, relying on the SUS304 rod for durability in industrial environments.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-50S the Right Cylinder?
Choose this 100mm bore cylinder when your application requires 3927N of push force at 0.5MPa, or up to 7068N at 0.9MPa. If your setup needs less force, stepping down to an 80mm bore yields 2513N at 0.5MPa. The adjustable stroke is ideal for product changeovers where exact end-of-stroke positioning varies slightly, saving you from swapping out a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, select a SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 100mm bore, 275mm stroke, 50mm adjustment, PT tapered port, and the -S magnet option. Because the stroke is 275mm, ensure you use an external guide to prevent side-loading on the 25mm rod thread, even with the standard M20x1.5 rod threading.
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 SAIJ100BX275-50S FAQ
At 0.5MPa it provides 3927N of push force and 3681N of pull force. If you increase operating pressure to 0.9MPa, the push force reaches 7068N.
The rear adjuster screw lets you mechanically shorten the 275mm nominal stroke down to a 225mm minimum. This creates a 50mm usable travel window for fine-tuning the end position at commissioning, but it functions as a stop, not a lock.
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