Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40S 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 SAIJ40BX750-40S
The AirTAC SAIJ40X750-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 879N of push force at 0.7 MPa and features a 750mm nominal stroke that can be fine-tuned backward by up to 40mm, yielding a usable travel window of 710-750mm. This built-in adjustability allows precise end-position tuning during commissioning without swapping out the cylinder or adding external stops.
Configured with a SUS304 stainless steel rod (code B) and a PT tapered port thread, this variant is tailored for environments requiring superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) enables seamless position detection with AirTAC CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40S |
|---|---|
| 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 SAIJ40BX750-40S
| 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 SAIJ40BX750-40S Is Used
Product Changeover
Dial in the 710-750mm travel window on packaging lines to accommodate different carton sizes without physically replacing the actuator.
Commissioning Fine-Tune
Use the rear stopper to precisely set the retracted end position during machine setup, avoiding the need for external shims or spacer blocks.
Extended Reach Sorting
Leverage the 750mm stroke and SUS304 rod for robust, corrosion-resistant actuation on long-reach diverters in washdown environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-40S the Right Cylinder?
Select this 40mm bore when an application demands the 628N push force at 0.5 MPa (or 879N at 0.7 MPa) alongside variable end-stops for product changeovers. If your setup requires less force, stepping down to a 32mm bore yields 563N at 0.7 MPa; stepping up to a 50mm bore provides 1374N at 0.7 MPa. The rear adjuster acts strictly as a travel stop and does not hold the load without live air—true load-holding requires a SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
Because this cylinder features a 750mm stroke, the 16mm rod should be properly supported by an external guide to mitigate side-loading and prevent binding over extended travel. To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 40mm bore, 750mm stroke, 40mm adjustment, PT G1/4 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting options, and the -S 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 SAIJ40BX750-40S FAQ
This 40mm bore cylinder provides 628N of push force and 528N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw allows you to shorten the effective stroke by up to 40mm. This creates a usable travel window of 710-750mm from the 750mm nominal stroke, enabling fine-tuning of the end position without changing the cylinder.
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