Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S
The AirTAC SAIJ40X135-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 135 mm stroke that can be dialed back by up to 30 mm, yielding a precise 105-135 mm usable travel window for on-the-fly end-position tuning. Delivering 628 N of push force at 0.5 MPa, it fits mid-range automation tasks perfectly.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel retains standard ISO 15552 mounting dimensions, while the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAIJ40BX135-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAIJ40BX135-30S Is Used
End-Position Calibration
Dial in the exact 105-135 mm travel distance during machine commissioning to perfect part seating without physically swapping hardware.
Product Changeover
Quickly adjust the rear stopper by up to 30 mm to accommodate varying product sizes on a single production line.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for reliable actuation in humid or washdown manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-30S the Right Cylinder?
Select this 40 mm bore when an application requires exact end-position calibration during commissioning or product changeover, avoiding the need to swap cylinders or add external stops. If your setup needs less force, the 32 mm bore offers 402 N at 0.5 MPa; for heavier loads, the 50 mm bore provides 982 N. Because this is a 135 mm stroke, the 16 mm rod and M12x1.25 thread handle moderate side loads, though long unsupported travel still requires an external guide.
To match this exact configuration, specify a 40 mm bore, 135 mm stroke, 30 mm adjustment range, PT tapered ports, and the -S magnet option. Remember that the rear adjuster and air cushions only decelerate the stroke; for load-holding without live air, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX135-30S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back from the 135 mm nominal stroke down to 105 mm. It only sets the end position and does not lock the load without continuous air pressure.
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