Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 145mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke145 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100
The AirTAC SAIJ40X145-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down by up to 100 mm. This creates a highly flexible usable travel window of 45 to 145 mm, letting you dial in exact end positions during commissioning without swapping out the physical cylinder. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance.
Unlike fixed-stroke SAI units, this adjustable model uses an external stopper screw at the retract end to fine-tune deceleration and travel limits. The adjuster acts purely as a mechanical stop and does not lock the load without live air pressure. It features PT tapered port threads (G1/4) and supports a standard operating speed of 30-800 mm/s, utilizing variable air cushions at both ends to manage impact energy smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 145 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×145 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX145-100 Is Used
Machine Setup & Changeover
Quickly reconfigure the retract end-position from 45 to 145 mm during product family changeovers without disassembling the tooling.
Variable End-Stop Positioning
Dial in precise end-of-stroke limits during commissioning using the rear adjuster, perfect for testing actuation depths on new assemblies.
Multi-Format Processing Lines
Handle varying part lengths on a single conveyor line by adjusting the cylinder's effective stroke window to match each specific format size.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-100 the Right Cylinder?
Choose this 40 mm bore when your application requires 628 N of push force (at 0.5 MPa) but demands variable end-stops for frequent product changeovers. If you need less force, the 32 mm bore offers 402 N; if you need more, the 50 mm bore provides 982 N. The massive 100 mm adjustment range on this specific SKU is ideal for prototyping or machinery that processes multiple part sizes on a single line, eliminating the need to bolt on external stops.
Because the nominal stroke is 145 mm, the unsupported rod length is moderate, but you should still ensure proper mounting alignment to prevent side-load wear. This cylinder uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR options. It is dimensionally interchangeable per ISO 15552. Note that a plain SAIJ does not hold its load without live air; for true load-holding, consider the SAIL or BSAI series.
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 SAIJ40 Adjustable Cylinder SAIJ40BX145-100 FAQ
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke by up to 100 mm. This gives you a usable travel window of 45 to 145 mm. It only sets the travel end and does not lock the load without continuous air pressure.
At a standard operating pressure of 0.5 MPa, the SAIJ40X145-100 provides 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it delivers up to 128 kgf.
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