Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75 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 SAIJ40BX600-75
The AirTAC SAIJ40X600-75 is a double-acting, single-rod profile cylinder built to ISO 15552 mounting dimensions. It features a rear-mounted adjusting screw that allows you to trim the effective travel back by up to 75 mm, creating a usable stroke window of 525 to 600 mm. This built-in stopper lets you dial in the exact retract position during commissioning without adding external stops or swapping the cylinder.
Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, this 40 mm bore unit is equipped with a SUS304 stainless steel rod for superior corrosion resistance. It uses a PT tapered G1/4 port and includes variable air cushions at both ends to absorb kinetic energy. Note that the adjuster and cushions only decelerate the travel end; they do not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75 |
|---|---|
| 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 SAIJ40BX600-75
| 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 SAIJ40BX600-75 Is Used
Machine Changeover
Quickly adapt retract distances on a packaging line when switching to a different product size, using the 75 mm adjustment window to fine-tune the end stop.
End-Position Tuning
Dial in the exact 525 to 600 mm travel required during initial commissioning without fabricating custom external spacers or mounting plates.
Variable Reject Arms
Adjust the stroke length on a sorting diverter arm to handle varying package widths on the fly, ensuring precise positioning without changing cylinders.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX600-75 the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when your machine setup requires precise end-position tuning or frequent product changeovers that alter the required retract distance. If you need more force, stepping up to the 50 mm bore yields 982 N push at 0.5 MPa, while dropping to a 32 mm bore reduces it to 402 N. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is a travel stop, not a locking mechanism.
Because the 600 mm stroke creates a long lever arm, the 16 mm rod and M12x1.25 thread will experience greater bending stress under side loads; an external guide rail is strongly recommended to prevent premature seal wear. This configuration uses a PT port thread, lacks a magnet for sensors, and supports SAIJ mounting options including 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 SAIJ40BX600-75 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. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
The rear adjuster screw acts as a mechanical stop that can shorten the 600 mm nominal stroke by up to 75 mm, giving an effective travel range of 525 to 600 mm. It only sets the end position and does not lock the load without live air.
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