Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75
The AirTAC SAIJ40X750-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel anywhere within a 675 to 750 mm 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 uses a PT tapered port thread.
This adjustable model lets you dial in exact end positions during commissioning without adding external stops. The rear mechanism acts purely as a travel stop for deceleration and is not a locking device, meaning it will not hold a load without continuous air pressure. For position holding without live air, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 750 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 SAIJ40BX750-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×750 | 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 SAIJ40BX750-75 Is Used
Variable End Stops
Dial in the precise 675 to 750 mm end position during machine setup without physically swapping cylinders or adding bulky external stopper blocks.
Product Changeovers
Quickly adjust the stroke length on packaging lines to accommodate different carton or product sizes on the fly, minimizing downtime.
Corrosive Environments
Leverage the SUS304 stainless steel rod for pushing and pulling tasks in washdown or mildly corrosive industrial settings where carbon steel would fail.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75 the Right Cylinder?
Choose this 40 mm bore when you need more power than a 32 mm cylinder (402 N push at 0.5 MPa) but want a more compact footprint than a 50 mm unit (982 N). The 75 mm adjustment range is ideal for product changeovers on a line where the exact end-of-stroke position varies by part size. Because the nominal stroke is 750 mm, an external guide is strongly recommended to prevent excessive side-loading on the rod.
When specifying a replacement, verify the 40 mm bore, 750 mm stroke, 75 mm adjustment range, PT port thread, and the SUS304 rod material. Note that SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR options. Since no magnet is specified, it will not work with CMSE or DMSE sensors.
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 SAIJ40BX750-75 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 75 mm. This creates a usable travel window of 675 to 750 mm, enabling fine-tuning at commissioning without changing the cylinder.
At an operating pressure of 0.5 MPa, the SAIJ40X750-75 provides 628 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
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