Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10
The AirTAC SAIJ40X180-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, featuring a 16mm piston rod with an M12x1.25 thread. By integrating a rear stopper screw, this model provides a usable travel window of 170-180mm, letting you trim the effective stroke by up to 10mm without swapping out the physical cylinder.
This adjustable-stroke design is ideal for fine-tuning end positions during machine commissioning or product changeovers, eliminating the need to bolt on external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the rod is constructed from SUS304 stainless steel (code B) for enhanced corrosion resistance. It features PT tapered port threads (G1/4) and uses variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 180 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 SAIJ40BX180-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×180 | 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 SAIJ40BX180-10 Is Used
Machine Commissioning
Dial in the exact 170-180mm end-of-stroke position during initial setup to perfect tooling alignment without machining new spacers.
Product Changeover
Quickly adjust the 10mm travel window on a packaging line to accommodate slight variations in new product sizes.
Variable End Stops
Use the rear stopper to set precise retract positions for clamping or pressing tasks that require strict positional control.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-10 the Right Cylinder?
Choose this 40mm bore when you need precise end-position tuning on a 180mm nominal stroke, stepping up from a 32mm bore (402N push at 0.5 MPa) to gain extra thrust, or down from a 50mm bore (982N push) if you want a more compact footprint. The rear adjuster acts strictly as a travel stop to set the 170-180mm window, not as a locking device; it cannot hold a load without continuous live air. For load-holding requirements without pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder instead.
When matching this for an ISO 15552 replacement, verify the 40mm bore, 180mm stroke, 10mm adjustment range, PT port threads, and the specific mounting accessory (available options include Basic, FA, LB, TC, FTC, TCM1, and TCM2). Because the 180mm stroke is relatively short, side-loading on the M12x1.25 rod is minimal, but an external guide is always recommended for heavy lateral loads.
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 SAIJ40BX180-10 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 180mm nominal stroke by up to 10mm. This creates a 170-180mm usable travel window for fine-tuning the retract end position without replacing the cylinder.
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