Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S
The AirTAC SAIJ40X475-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down from 475 mm to a minimum of 445 mm. Delivering 879 N of push force at 0.7 MPa, it is equipped with a SUS304 stainless steel rod for superior corrosion resistance and a magnetic piston for position sensing.
The integrated adjuster acts purely as a mechanical stop to set the retract end-position during commissioning or product changeovers, meaning it cannot hold a load without live air pressure. Because the stroke is 475 mm, the 16 mm rod and M12x1.25 thread should be supported by an external guide to manage side loads on the extended rod.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 475 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 SAIJ40BX475-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×475 | 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 SAIJ40BX475-30S Is Used
Travel Window Tuning
Dial in the exact 445-475 mm retract position during machine setup to accommodate varying product sizes without adding external stops.
Changeover Adjustment
Quickly reconfigure the end-of-stroke position for new production runs using the rear screw, saving time on line changeovers.
Sensor-Ready Positioning
Leverage the -S magnet with DMSE solid-state sensors to confirm the adjusted end-position in automated assembly processes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-30S the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (providing 563 N push at 0.7 MPa) is insufficient, but you want to avoid the larger footprint of a 50 mm cylinder. The 30 mm adjustment range is ideal for applications requiring variable end-stops without swapping the cylinder, unlike a fixed-stroke SAI model.
For an exact ISO 15552 replacement, match the 40 mm bore, 475 mm stroke, 30 mm adjustment, PT tapered port threads, and the -S magnet option. Remember that the rear adjuster is a travel stop, not a lock; for true load-holding without live pressure, consider the SAIL or BSAI series instead. Mounting options are limited to 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 SAIJ40BX475-30S FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 475 mm stroke by up to 30 mm, creating a usable travel window of 445 to 475 mm. It only sets the end position and does not lock the load without live air.
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