Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50
The AirTAC SAIJ40X230-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel. With a 230 mm nominal stroke and a 50 mm adjustment range, you get a usable travel window of 180 to 230 mm to dial in end positions without adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, fitting medium-duty tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This SKU is built with a SUS304 stainless steel rod for corrosion resistance and uses PT tapered port threads. The 16 mm rod and M12x1.25 thread handle side loads well, but for this 230 mm stroke, using an external guide is recommended to prevent rod binding. The rear adjuster acts purely as a travel stop for end-position tuning, so it will not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAIJ40BX230-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SAIJ40BX230-50 Is Used
Product Changeover
Dial in the 180-230 mm travel window during line changeovers to accommodate different package sizes without physically swapping cylinders.
End-Position Tuning
Fine-tune the retract stop at commissioning to perfect the seating of components, absorbing mechanical tolerances without external shims.
Variable End Stops
Adjust the rear stopper on the fly for sorting or diverter mechanisms that need slightly different stroke lengths for various products.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50 the Right Cylinder?
Choose this 40 mm bore when you need more force than a 32 mm cylinder (which provides 402 N push at 0.5 MPa) but want a more compact footprint than a 50 mm option. The adjustable stroke is ideal for machines that require frequent product changeovers, allowing you to fine-tune the 180-230 mm travel window during commissioning rather than swapping out a fixed-stroke SAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
If your application requires the cylinder to hold its position without continuous air pressure, note that the rear adjuster is only a stop, not a lock. For true load-holding, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. To replace an ISO 15552 cylinder, match the 40 mm bore, 230 mm stroke, 50 mm adjustment, PT ports, and the appropriate mounting interface.
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 SAIJ40BX230-50 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1130 N of push force.
The rear adjuster screw lets you shorten the 230 mm nominal stroke by up to 50 mm, creating a usable travel window of 180 to 230 mm. It acts as a mechanical stop for end-position tuning and is not a lock, meaning the cylinder will not hold its load without live air pressure.
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