Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S
The AirTAC SAIJ40X600-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel within a 580-600 mm window without swapping components. Equipped with a SUS304 stainless steel rod and a magnetic piston for position sensing, it delivers 628 N of push force at 0.5 MPa. The integrated sensor grooves on both sides of the extruded aluminum barrel accept AirTAC CMSE reed or DMSE electronic solid-state switches.
This 40 mm bore model uses a G1/4 port and includes adjustable air cushions at both ends to manage deceleration over the long 600 mm travel. The rear stopper lets you dial in the exact retract position during commissioning or product changeovers, eliminating the need for external mechanical stops while preserving the standard ISO 15552 mounting footprint.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 600 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 SAIJ40BX600-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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 SAIJ40BX600-20S Is Used
Product Changeover
Dial in the 580-600 mm retract position during format size changes on packaging lines without adding external mechanical stops.
End-Position Tuning
Fine-tune the exact end-of-stroke stopping point during machine commissioning to achieve precise mechanical alignment.
Variable End Stops
Adjust the travel window on sorting or diverting conveyors to accommodate different package lengths on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-20S the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N push force at 0.5 MPa, stepping up from a 32 mm bore that provides 402 N, or down from a 63 mm bore yielding 1559 N. The adjustable-stroke design is ideal for machinery requiring variable end-stops or precise retract tuning during setup, whereas a fixed SAI cylinder is sufficient for static, unchanging strokes. To replace an ISO 15552 cylinder, match the 40 mm bore, 600 mm stroke, PT tapered port thread, and -S magnet.
Because the 600 mm stroke is substantial, the 16 mm rod should be guided externally to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL pneumatic lock, BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ40BX600-20S 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 the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the nominal 600 mm stroke by up to 20 mm, creating a usable travel window of 580-600 mm. The adjuster acts as a mechanical stop to set the retract end position and does not function as a lock.
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