Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40 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 SAIJ40BX750-40
The AirTAC SAIJ40X750-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 710-750mm usable travel window. Delivering 628N of push force at 0.5 MPa, it handles long-traverse positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible CMSE or DMSE switch mounting.
This unit omits the FB, CA, CB, and CR mounts, offering a reduced ISO 15552 mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. The piston rod is constructed from SUS304 stainless steel (code B), and fluid connections use PT tapered threads. Because the 750mm stroke is non-standard, this SKU is produced as a made-to-order item.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40 |
|---|---|
| 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 SAIJ40BX750-40
| 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 SAIJ40BX750-40 Is Used
Variable Product Changeover
Dial in the 710-750mm travel window to accommodate different package lengths on a packaging line without physically replacing the actuator.
Commissioning End-Tuning
Use the 40mm rear stopper screw to fine-tune the exact retract position during machine setup, eliminating the need for external mechanical shims.
Long-Traversal Assembly
Leverage the 750mm travel for extended linear movement in assembly stations, relying on the SUS304 rod for environmental resilience.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40 the Right Cylinder?
Choose this 40mm bore when an application requires a 628N push force at 0.5 MPa but a 32mm bore providing 402N is insufficient. Stepping up to a 50mm bore yields 982N if your payload increases. The 40mm adjustment screw allows you to dial in the exact end-of-stroke position during commissioning or product changeovers without adding external stops or swapping out a fixed-stroke SAI cylinder.
At 750mm of travel, the M12x1.25 rod is highly susceptible to side-loading and bending; an external guide is mandatory to prevent premature seal failure. Remember that the rear adjuster and air cushions only decelerate the load—they do not hold position. For true drop-prevention without live air, select an SAIL or BSAI cylinder instead. To match this ISO 15552 footprint, specify a 40mm bore, 750mm stroke, 40mm adjustment, PT ports, SUS304 rod, and no magnet.
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 SAIJ40BX750-40 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 delivers 1130N of push force.
The rear adjuster acts as a travel stop that lets you shorten the effective stroke by up to 40mm. This creates a usable travel window of 710-750mm, allowing you to set the precise end position at commissioning without changing the cylinder.
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