Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40
The AirTAC SAIJ40X65-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 65 mm travel back by up to 40 mm. This creates a highly flexible 25-65 mm usable stroke window, ideal for dialing in exact end positions during machine commissioning without adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This model uses a SUS304 stainless steel rod, offering superior corrosion resistance compared to standard carbon steel, making it suitable for harsher environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors. It features a PT tapered G1/4 port and operates at speeds from 30 to 800 mm/s.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 65 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 SAIJ40BX65-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×65 | 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 SAIJ40BX65-40 Is Used
Commissioning Fine-Tuning
Dial in the exact 25 to 65 mm end-position during initial machine setup without swapping out the physical cylinder or adding bulky external stopper blocks.
Product Changeover
Quickly adjust the travel window on packaging lines when handling slightly different package sizes, using the rear screw to adapt the stroke on the fly.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod for light-duty pushing or pulling tasks in environments where standard carbon steel rods might face moisture or chemical exposure.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier loads, or down from a 50 mm bore (982 N) to save space. The adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product changeovers. Configuration includes a 65 mm stroke, 40 mm adjustment, PT G1/4 port, SUS304 rod, and no magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Remember that the rear adjuster acts only as a mechanical stop and does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series. Since the stroke is under 300 mm, side-load concerns are minimal, but always ensure axial load alignment.
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 SAIJ40BX65-40 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it delivers 1130 N of push force.
The rear adjuster screw lets you mechanically shorten the 65 mm nominal stroke by up to 40 mm, providing a usable travel window of 25 to 65 mm. This allows precise end-position tuning without changing the cylinder itself.
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