This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ40X75-30, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30
The AirTAC SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 75mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ40X75-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke75 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAIJ40X75-30
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30
The AirTAC SIJ40X75-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 45-75 mm extension out of the 75 mm nominal maximum.
As this SIJ model is end-of-life, the direct replacement is the SAIJ40X75-30, matching the interface, bore, force, and mounting. The SAIJ upgrade features a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 Technical Specifications
| Model | Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ40X75-30 |
| Bore size | Ø40 mm |
| Stroke | 75 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ40X75-30 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAIJ40X75-30 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 Is Used
Adjustable Push Stations
Light-duty assembly push stations needing precise 45-75 mm part ejection, where the 30 mm stop screw tunes the extend endpoint on-site without machining spacers.
Variable Transfer Diverters
Package routing diverters on conveyors handling varying box widths, using the external stop to alter the actuator reach dynamically for different line setups.
Replacing the Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 with the SAIJ40X75-30
To replace the discontinued SIJ40X75-30, order the direct replacement SAIJ40X75-30, reusing your existing FA, LB, or TC ISO 15552 mounts. Choose the 30 mm adjust window if your application requires field tuning the extend stroke down to a 45 mm minimum. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; add external physical stops or switches if detection is required. Since the 75 mm stroke is under 300 mm, side-load rod deflection is minimal, but always verify guide alignment. The stop screw only sets the end position; for load holding on air loss, use an external rod lock, a pilot-operated check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ40X75-30
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-30 FAQ
Yes, the AirTAC SIJ40X75-30 is discontinued. The direct replacement is the SAIJ40X75-30, which shares the identical ISO 15552 interface, 40 mm bore, 75 mm stroke, 30 mm adjust window, G1/4 port, and mounting options. The SAIJ family also upgrades the piston seal to a two Y-shaped one-way element design for lower start-up pressure and longer life.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the extend stroke from the 75 mm nominal maximum down to 45 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ40X75-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ40X75-30 replacement — usually within 7-8 hours.