Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S
The AirTAC SAIJ40X185-10-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, utilizing a 16mm rod with an M12x1.25 thread. By turning the rear stopper screw, you can fine-tune the effective travel down from the 185mm nominal stroke, creating a precise 175-185mm usable window. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops during machine commissioning.
This SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and because it carries the -S magnet option, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts strictly as a travel stop to set the end position and does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 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 SAIJ40BX185-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 SAIJ40BX185-10S Is Used
Machine Commissioning
Dial in the exact 175-185mm end-stop during initial setup to perfect a pressing or clamping distance without machining custom spacers.
Product Changeover
Quickly adapt the retract position on a packaging line when switching to a different carton size, using the 10mm adjustment range to vary the stroke.
Assembly Positioning
Locate parts accurately on a conveyor by fine-tuning the extend stroke, relying on the 628N push force to move components into place.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX185-10S the Right Cylinder?
Select this 40mm bore adjustable cylinder when your application requires exact end-position tuning at commissioning or during product changeover, rather than the fixed travel of a standard SAI model. If your process needs less force, stepping down to a 32mm bore yields 402N push at 0.5 MPa; if you require more thrust, a 50mm bore provides 982N. The 16mm rod and M12x1.25 thread handle moderate side loads well, but any stroke over 300mm demands an external guide to prevent rod binding.
For a true ISO 15552 replacement match, ensure your setup specifies a 40mm bore, 185mm stroke, 10mm adjustment range, PT port thread, and the -S magnet for CMSE/DMSE sensors. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR brackets. Remember that this cylinder does not hold position without continuous air; for fail-safe 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 SAIJ40BX185-10S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It can deliver up to 1130N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back by up to 10mm from the 185mm nominal stroke, creating a 175-185mm usable window. It sets the end position but does not lock the load without live air pressure.
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