Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 425mm 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
- Stroke425 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75
The AirTAC SAIJ100X425-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down from a 425 mm nominal stroke to a 350 mm minimum. This yields a 75 mm setup flexibility range, letting you dial in the retract end-position at commissioning without adding external stops or swapping the barrel. The extruded aluminum profile includes sensor grooves on both sides, and this specific SKU is built with a SUS304 stainless steel rod (material code B) for superior corrosion resistance.
Delivering 5497 N of push force and 3681 N of pull force at 0.7 MPa, it utilizes a robust 25 mm rod and M20x1.5 rod thread to handle high side loads. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits; it is not a locking device and will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 425 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 SAIJ100BX425-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×425 | 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 SAIJ100BX425-75 Is Used
Variable End-Stop Setup
Perfect for packaging lines that process multiple carton sizes, allowing operators to dial in the retract position within the 350-425 mm window during format changeovers.
Machine Commissioning
Enables fine end-position tuning during initial machine build, letting engineers trim the 425 mm stroke back by up to 75 mm to perfectly align tooling without machining spacers.
Corrosive Environment Actuation
The SUS304 stainless steel rod makes this double-acting cylinder suitable for food or washdown environments where standard carbon steel rods would fail prematurely.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-75 the Right Cylinder?
Choose this 100 mm bore cylinder when an 80 mm bore (providing 3518 N push at 0.5 MPa) is insufficient, but you want to avoid stepping up to a 125 mm bore (8590 N push at 0.5 MPa) which adds excess bulk. The adjustable stroke is ideal for product changeovers on a line where the end-stop position frequently shifts by up to 75 mm, replacing the need to physically swap out a fixed-stroke SAI cylinder.
When integrating this model, note the PT tapered port threads (G1/2) and the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the 425 mm stroke is substantial, always support the load with an external guide to prevent excessive rod deflection and premature seal wear.
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 SAIJ100BX425-75 FAQ
At a 0.7 MPa operating pressure, this 100 mm bore cylinder provides 5497 N of push force and 3681 N of pull force. It can reach a maximum push force of 7068 N at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the 425 mm nominal stroke down to 350 mm. It acts as a mechanical stop to set the travel end, but it is not a lock and cannot hold a load without continuous air pressure.
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