Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75S 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 SAIJ40BX600-75S
The AirTAC SAIJ40X600-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 600 mm travel by up to 75 mm for a precise 525-600 mm usable window. Operating at 0.15-1.0 MPa, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The barrel is extruded aluminum with sensor grooves on both sides, and because this unit includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for exact position verification.
This SKU is factory-configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and ships with PT tapered ports. The G1/4 porting and M12x1.25 rod thread handle the pneumatic flow and mounting requirements for a 16 mm rod. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning without adding external stops; it is not a lock and will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75S |
|---|---|
| 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 SAIJ40BX600-75S
| 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 SAIJ40BX600-75S Is Used
Product Changeover Adjustment
Dial in the 525-600 mm travel window during line changeovers to accommodate different package lengths without physically swapping the cylinder.
Variable End-Stop Diverter
Fine-tune the retract position on a sorting diverter arm to handle varying product sizes on the fly, using the rear screw instead of external hard stops.
Commissioning Calibration
Precisely set the final end-of-stroke position during machine commissioning to dial out mechanical interference and achieve exact kinematics.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75S the Right Cylinder?
Choose this 40 mm bore adjustable-stroke model when your machine setup requires variable end-stops or frequent product changeovers that demand slight travel modifications, rather than relying on a fixed-stroke SAI cylinder. If your application requires higher thrust, stepping up to the 50 mm bore increases the 0.5 MPa push force to 982 N. Conversely, dropping to a 32 mm bore reduces the push force to 402 N.
Because the 600 mm stroke is substantial, the 16 mm rod and M12x1.25 rod thread will experience significant leverage under side loads; an external guide is recommended to prevent rod binding over this long unsupported travel. For load-holding without live air, this cylinder is insufficient—the rear adjuster only sets the travel end—so you should explore an AirTAC SAIL air-released lock or BSAI clamp-lock cylinder. This SAIJ model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX600-75S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If operated at 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel from the 600 mm nominal stroke down to a minimum of 525 mm, creating a 75 mm adjustable window. It acts as a mechanical stop for end-position tuning and is not a lock, meaning it cannot hold a load without continuous air pressure.
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