Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50S 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 SAIJ40BX750-50S
The AirTAC SAIJ40X750-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 750mm nominal stroke that can be fine-tuned down by up to 50mm, creating a precise 700-750mm usable travel window. This built-in adjustability allows you to dial in the retract end-position at commissioning without swapping hardware or adding external stops.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses a PT G1/4 port and operates at speeds from 30-800mm/s, relying on adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50S |
|---|---|
| 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 SAIJ40BX750-50S
| 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 SAIJ40BX750-50S Is Used
Machine Changeover
Fine-tune the 700-750mm retract position on the fly when adapting a production line to accommodate different product sizes without changing cylinders.
End-Stop Calibration
Dial in the exact end-of-stroke position during commissioning to perfect a critical machining or clamping operation using the rear adjustment screw.
Material Handling
Manage long-travel sorting or gating tasks on a conveyor, using the SUS304 rod and adjustable stop to handle varied package dimensions reliably.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-50S the Right Cylinder?
Choose this 40mm bore when an application requires moderate force, specifically 628N push or 528N pull at 0.5 MPa. If your setup demands greater thrust, stepping up to the 50mm bore yields 982N push force. Conversely, lighter duties can use the 32mm bore at 402N. The adjustable stroke is selected over a fixed SAI cylinder when machine changeovers require a variable end-stop, letting you trim the travel back within that 700-750mm window during setup.
Because the nominal stroke is 750mm, the M12x1.25 rod should be guided externally to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster and air cushions act only as travel stops and deceleration devices; they do not hold the load without live air. For true load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder. This model is dimensionally interchangeable per ISO 15552 and uses the standard SAIJ mounting set: 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 SAIJ40BX750-50S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 50mm. This means the 750mm nominal stroke can be precisely trimmed to any travel length within a 700-750mm window. The adjuster acts purely as a mechanical stop and does not lock the load.
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