Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75
The AirTAC SAIJ40X105-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 105 mm stroke that can be dialed back by up to 75 mm, creating a highly flexible 30-105 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features a PT tapered port thread.
This adjustable model allows you to fine-tune end positions at commissioning without swapping hardware or adding external stops. The rear screw acts purely as a travel stop and works alongside variable air cushions at both ends to manage deceleration. It does not hold the load without live air pressure; for locking needs, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAIJ40BX105-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SAIJ40BX105-75 Is Used
Product Changeover
Dial in the exact end-stop distance on the fly when switching between product sizes on a packaging line, utilizing the 30-105 mm adjustable window.
Commissioning Setup
Fine-tune the retract position during initial machine build without machining new spacers or replacing the entire cylinder.
Variable End Stops
Establish precise mechanical limits for testing fixtures where the required travel distance varies between runs.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-75 the Right Cylinder?
Choose this 40 mm bore when an application requires precise positioning within a 30-105 mm window, rather than relying on a fixed-stroke SAI cylinder. If your setup demands less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. Conversely, stepping up to a 50 mm bore provides 982 N. Because the nominal stroke is 105 mm, side-load risks are moderate, but always ensure adequate external guiding for optimal rod life.
To match this exact configuration for an ISO 15552 replacement, specify a 40 mm bore, 105 mm stroke with a 75 mm adjustment range, PT port thread, and the SUS304 (B) rod material. Note that SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits FB, CA, CB, and CR mounts. This unit omits the magnet, so it requires external physical sensors rather than CMSE or DMSE switches.
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 SAIJ40BX105-75 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 its maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw allows you to trim the effective travel back from the 105 mm nominal stroke by up to 75 mm. This creates a usable stroke window of 30 to 105 mm, enabling on-the-fly end-position tuning without changing the cylinder.
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