Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-20S 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 SAIJ100BX275-20S
The AirTAC SAIJ100X275-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 255-275 mm usable travel window, letting you dial back the nominal 275 mm stroke by up to 20 mm during commissioning. Operating at 0.5 MPa, it generates 3927 N of push force and 3681 N of pull force. This variant includes a SUS304 stainless steel rod for superior corrosion resistance and an integrated magnet for electronic DMSE or reed CMSE position sensing.
Because the adjuster acts purely as a mechanical stop on the retract end, it does not hold the load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides for easy switch mounting. It supports a speed range of 30-800 mm/s and uses a PT tapered G1/2 port. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB and CA styles found on some standard variants.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-20S |
|---|---|
| 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 SAIJ100BX275-20S
| 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 SAIJ100BX275-20S Is Used
Machine Changeover
Fine-tune the 255-275 mm retract end-stop during product size transitions on a packaging line without swapping the cylinder.
Variable End Positioning
Dial in the exact end-of-stroke contact point for a pressing or spotting operation, absorbing minor mechanical variances at commissioning.
Heavy-Duty Conveying
Leverage the 3927 N push force to divert or stop heavy pallets, adjusting the stroke window to accommodate different pallet depths.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX275-20S the Right Cylinder?
Select this 100 mm bore cylinder when an application requires heavy force—delivering 3927 N at 0.5 MPa—combined with precise end-position tuning. If your process needs less force, stepping down to an 80 mm bore yields 2513 N, whereas moving up to 125 mm provides 6136 N. Choose this adjustable-stroke SAIJ model over a fixed SAI when you need variable end stops for product changeovers without adding external stops. To match this cylinder for an ISO 15552 replacement, verify the 100 mm bore, 275 mm stroke, 20 mm adjustment, PT G1/2 port, SUS304 rod, and -S magnet.
Since the 275 mm stroke exceeds 300 mm only marginally, side-load risks are moderate, but for maximum longevity, always use an external guide to support the load and prevent rod binding. For applications requiring the load to be held mechanically without continuous air pressure, select a SAIL or BSAI series cylinder instead of relying on the SAIJ adjuster.
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 SAIJ100BX275-20S FAQ
The rear adjuster allows you to shorten the effective stroke by up to 20 mm, creating a 255-275 mm usable travel window. It functions as a mechanical stop to fine-tune the retract position and is not a lock that holds the load without air pressure.
At a standard 0.5 MPa operating pressure, the SAIJ100X275-20-S provides 3927 N of push force and 3681 N of pull force. It can generate up to 801 kgf at its maximum 1.0 MPa pressure rating.
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