Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30
The AirTAC SAIJ40X350-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 320-350 mm window. It delivers a push force of 879 N at 0.7 MPa, making it well-suited for moderate-load positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is supplied without a magnet.
This configuration uses a SUS304 stainless steel piston rod (material code B) for enhanced corrosion resistance. It features a 16 mm rod with an M12x1.25 thread, and because the 350 mm stroke is relatively long, the rod diameter provides good resistance to deflection, though an external guide is still recommended for heavy offset loads. The rear adjuster acts purely as a travel stop to set deceleration and end positions, and it does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAIJ40BX350-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAIJ40BX350-30 Is Used
Machine Changeover
Dial in the exact 320 to 350 mm end-stop during product size transitions on a packaging line without adding external mechanical stops.
Assembly Calibration
Fine-tune the retract position during equipment setup to guarantee precise component placement before final locking.
Material Diversion
Adjust the stroke length on the fly to alter the pushing distance of a diverter arm handling varying package widths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-30 the Right Cylinder?
Choose this 40 mm bore if you need precise end-position tuning during commissioning or product changeovers without swapping out the entire cylinder. If your application requires less force, stepping down to a 32 mm bore yields 563 N of push force at 0.7 MPa; if you need significantly more power, stepping up to a 50 mm bore provides 1374 N.
For a direct ISO 15552 replacement match, ensure your setup specifies a 40 mm bore, 350 mm stroke, 30 mm adjustment range, PT tapered port threads, and the SUS304 (B) rod material. Since the stroke is 350 mm, external load guiding is highly recommended to prevent side-loading damage. Remember that the rear adjuster is a stop, not a lock; for true load-holding without continuous air pressure, consider the SAIL or BSAI cylinder series instead.
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 SAIJ40BX350-30 FAQ
At an operating pressure of 0.7 MPa, this 40 mm bore cylinder generates a push force of 879 N and a pull force of 528 N. It can deliver up to 1130 N of push force at 0.9 MPa.
The external rear adjuster screw lets you shorten the nominal 350 mm stroke by up to 30 mm, providing an adjustable usable travel window of 320 to 350 mm. The adjuster functions as a mechanical stop for end-position tuning and does not hold the load without live air pressure.
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