Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20 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 SAIJ40BX180-20
The AirTAC SAIJ40X180-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 160-180 mm usable travel window, allowing you to dial back the nominal 180 mm stroke by up to 20 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it handles mid-range actuation tasks with precision.
This variant is equipped with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit ships without a magnet. The rear adjuster acts purely as a travel stop to fine-tune the end position and is not a locking mechanism.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20 |
|---|---|
| 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 SAIJ40BX180-20
| 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 SAIJ40BX180-20 Is Used
Product Changeover
Quickly fine-tune the 160-180 mm end-stop during packaging line format changes without replacing the cylinder or bolting on external stops.
Machine Setup
Dial in the exact retract position during initial commissioning to perfect tooling alignment, utilizing the 20 mm adjustment range.
Variable End Stops
Adjust the stroke on the fly for diverter arms or gating mechanisms that must accommodate slightly different package sizes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20 the Right Cylinder?
Choose this 40 mm bore when you need 879 N push force at 0.7 MPa, stepping up from a 32 mm bore (563 N) for heavier loads, or down from a 63 mm bore (2182 N) to save space. The 20 mm adjustment window is ideal for product changeovers that require slightly different end positions without swapping cylinders or adding external stops. Because the stroke is 180 mm, side-loading is moderate, but always guide the load for optimal bearing life.
For a direct ISO 15552 replacement match, specify a 40 mm bore, 180 mm stroke, 20 mm adjuster, PT port thread, SUS304 (B) rod material, and no magnet. Remember that the SAIJ rear adjuster only sets the retract end point; it does not hold the load without live air. For load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX180-20 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 739 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke from 180 mm down to 160 mm. It functions as a mechanical stop to set the end position, but it is not a lock and will not hold the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.