Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-100 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 SAIJ40BX750-100
The AirTAC SAIJ40X750-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 750 mm nominal stroke that can be dialed back by up to 100 mm, creating a 650-750 mm usable travel window for precise end-position tuning. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it handles medium-duty positioning. This configuration uses a SUS304 stainless steel rod (option B) for corrosion resistance and features PT tapered port threads.
The rear adjustment screw acts purely as a mechanical stop to set the retract distance and cannot hold a load without live air pressure. For load-holding without continuous air, an external pilot-operated check valve or a related AirTAC series like SAIL or BSAI is required. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE solid-state switches if a magnet is specified later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-100 |
|---|---|
| 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 SAIJ40BX750-100
| 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 SAIJ40BX750-100 Is Used
Machine Changeover
Dial in the 650-750 mm retract stop during product format changes without swapping the physical cylinder or adding external shims.
Variable End-Stop Positioning
Fine-tune the exact end-of-stroke position on a long-travel conveyor diverter to accommodate varying package dimensions.
Long-Stroke Assembly Press
Use the 100 mm adjustment window to set precise bottoming positions for a 750 mm stroke assembly press without mechanical spacers.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-100 the Right Cylinder?
Choose this 40 mm bore adjustable model when your assembly requires variable end-stops or frequent product changeovers, avoiding the need to physically swap cylinders or bolt on external stops. If your application needs 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. The 16 mm rod and M12x1.25 thread provide a robust interface, but at 750 mm of travel, the unsupported piston rod is highly susceptible to side-loading and deflection. An external guide rail must be used to prevent premature seal wear and binding.
As a dimensionally interchangeable ISO 15552 cylinder, this unit directly replaces other standard profile cylinders with identical 40 mm bore, 750 mm stroke, PT port, and 100 mm adjustment specifications. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR foot and pivot mounts. Operating speed ranges from 30-800 mm/s, driven by filtered air through a G1/4 port.
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 SAIJ40BX750-100 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 0.9 MPa, the push force increases to 1130 N. The operational speed range is 30-800 mm/s.
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm, creating a usable travel window of 650 to 750 mm. The adjuster acts only as a travel stop and does not lock or hold the load without continuous air pressure.
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