Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50S 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 SAIJ40BX230-50S
The AirTAC SAIJ40X230-50-S is a double-acting ISO 15552 profile cylinder featuring an external rear stopper that allows you to fine-tune the travel end. It provides a usable stroke window of 180 to 230 mm, letting you dial in the exact retract position without adding external stops. This 40 mm bore generates 879 N of push force at 0.7 MPa and uses a PT tapered port thread.
Built with a SUS304 stainless steel rod (code B), it handles splash and corrosion exposure better than carbon steel. The integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves. The rear adjuster acts purely as a travel stop for end-position tuning, not a lock, so it cannot hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50S |
|---|---|
| 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 SAIJ40BX230-50S
| 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 SAIJ40BX230-50S Is Used
Machine Changeover
Dial in the 180-230mm retract position during product size changes without replacing the cylinder or bolting on external stops.
Sensor Integration
The -S magnet pairs with AirTAC CMSE and DMSE switches in the profile grooves for precise end-of-stroke detection.
Corrosive Environments
The SUS304 stainless steel rod option provides reliable actuation in washdown or corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-50S the Right Cylinder?
Choose this adjustable-stroke model when a machine setup requires variable end stops or product changeover flexibility, avoiding the need to physically swap a fixed-stroke SAI cylinder. If your application needs less force, stepping down to a 32 mm bore yields 563 N at 0.7 MPa; if you need more thrust, a 50 mm bore provides 1374 N.
For a drop-in ISO 15552 replacement, match the 40 mm bore, 230 mm nominal stroke, 50 mm adjustment range, PT ports, and the -S magnet option. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 230 mm, ensure adequate guidance to prevent side-load wear on the rod.
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 SAIJ40BX230-50S FAQ
At 0.7 MPa, the 40 mm bore provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N push at 0.9 MPa.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective travel anywhere within a 180 to 230 mm window. It only sets the end position and does not lock the load without live air pressure.
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