Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50 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 SAIJ40BX750-50
The AirTAC SAIJ40X750-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 700 to 750 mm usable travel window. Delivering 879N of push force at 0.7 MPa, it integrates a robust 16mm carbon steel rod with M12x1.25 threading. This model uses a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads for a tight pneumatic seal.
The 50mm adjustment mechanism allows you to fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. It supports a speed range of 30-800 mm/s and includes variable air cushions at both ends. The extruded aluminum barrel offers sensor grooves on both sides, though this specific SKU omits the magnet, requiring external sensing if needed.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50 |
|---|---|
| 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 SAIJ40BX750-50
| 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 SAIJ40BX750-50 Is Used
Machine Changeover
Dial in the exact 700 to 750mm retract position during product size transitions without disassembling the pneumatic circuit or adding physical shims.
Variable End-Stop Positioning
Fine-tune the discharge point of a conveyor pusher by up to 50mm at the rear screw, perfect for accommodating varying package dimensions on the fly.
Commissioning Stroke Tuning
Trim the effective travel window during initial machine commissioning to resolve mechanical interferences or perfect the end-of-stroke impact without cylinder replacement.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50 the Right Cylinder?
Choose this adjustable 40mm bore when your application requires precise end-stop tuning during machine setup or product changeover, avoiding the rigid constraints of a fixed-stroke SAI cylinder. If your process needs less force, stepping down to a 32mm bore yields 563N at 0.7 MPa; stepping up to a 50mm bore provides 1374N. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure—use a SAIL or BSAI cylinder for true locking requirements.
Because this cylinder features a 750mm stroke, the extended 16mm rod is highly susceptible to side-loading forces; an external guide rail must be used to prevent premature seal wear and binding. This model is dimensionally interchangeable per ISO 15552 and supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ40BX750-50 FAQ
The rear adjuster screw allows you to shorten the nominal 750mm stroke by up to 50mm, creating a 700-750mm travel window. This stopper fine-tunes the end position at commissioning but does not lock the load without live air pressure.
At a standard operating pressure of 0.7 MPa, the SAIJ40X750-50 provides 879N of push force and 740N of pull force. It can deliver up to 1130N of push force at its maximum rated pressure of 0.9 MPa.
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