Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S
The AirTAC SAIJ100X300-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 7068N of push force at 0.9 MPa and provides a usable travel window of 280 to 300mm, allowing you to dial back the nominal 300mm stroke by up to 20mm during machine setup. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions.
Equipped with a -S magnet, this model directly supports AirTAC CMSE reed and DMSE electronic solid-state sensors housed within the dual-side sensor grooves of its extruded aluminum barrel. It features a SUS304 stainless steel rod for corrosion resistance, a G1/2 port, and variable air cushions at both ends to decelerate the load. The rear adjuster and cushions act strictly as travel stops and deceleration mechanisms, so a separate SAIL or BSAI lock is required if you need to hold a load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAIJ100BX300-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SAIJ100BX300-20S Is Used
Product Changeover Stops
Quickly dial in the 280-300mm travel window during format changes on a packaging line, using the rear screw to set new end positions without swapping hardware.
Machine Setup Tuning
Fine-tune the final retract position at commissioning to hit exact mechanical clearances, avoiding the need to machine custom external spacers.
Variable End-Position Dwell
Adjust the effective stroke length on the fly for multi-tier assembly processes where the pressing depth requires precise field adjustment.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-20S the Right Cylinder?
Choose this 100mm bore cylinder when an 80mm bore (providing 4523N push at 0.9 MPa) is insufficient, but a 125mm bore is oversized. The adjustable 280-300mm travel window is ideal for product changeovers on a line, letting you reposition the end-of-stroke stop without changing the mounting footprint. Because the nominal stroke is 300mm, you should pair this cylinder with an external guide rail to prevent excessive side-loading on the rod and front cap.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 100mm bore, 300mm stroke, 20mm adjustment range, PT tapered G1/2 port, and the -S magnet. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found in some standard lines.
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 SAIJ100BX300-20S FAQ
At an operating pressure of 0.9 MPa, this 100mm bore cylinder generates 7068N of push force and 6624N of pull force. At 0.5 MPa, it provides 3927N of push force.
The rear adjuster screw lets you shorten the effective travel from the nominal 300mm down to 280mm. This creates a 280-300mm usable window for fine-tuning the retract end position at commissioning without altering the cylinder mount.
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