This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ40X75-10, 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 SIJ40X75-10
The AirTAC SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-10 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 SAIJ40X75-10, 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 → SAIJ40X75-10
- 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 SIJ40X75-10
The AirTAC SIJ40X75-10 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and superseded by the direct replacement SAIJ40X75-10. It features a 40mm bore, G1/4 port, M12x1.25 rod thread, and an external stop screw that lets you trim the extend stroke by up to 10mm on-site, yielding a usable 65-75mm stroke. The nominal 75mm stroke is the maximum.
The exact SAIJ40X75-10 replacement retains the same ISO 15552 mounting interface, bore, stroke, and adjust window. The SAIJ family introduces an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. Note this non-magnetic SKU cannot accept a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-10 Technical Specifications
| Model | Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ40X75-10 |
| 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 SAIJ40X75-10 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 SAIJ40X75-10 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 SIJ40X75-10
| 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 SIJ40X75-10 Is Used
Divergent Part Ejection
Tuning the extend stroke by up to 10mm on-site allows a single cylinder to push different sized parts off a machining center bed without swapping physical hard stops.
Variable Depth Carton Sealing
Adjusting the extend end position on the fly accommodates cartons with slightly different heights, ensuring consistent sealing pressure without retooling the line.
Multi-Profile Clamping
Trimming the stroke down to 65mm provides precise clamping contact for shorter workpieces while retaining the full 75mm stroke capacity for longer raw material blanks.
Replacing the Airtac SIJ40 Double Shaft Adjustable Cylinder SIJ40X75-10 with the SAIJ40X75-10
To replace the discontinued SIJ40X75-10, specify the direct replacement SAIJ40X75-10, which preserves the 40mm bore, 75mm nominal stroke, 10mm adjust window, G1/4 port, and FA/LB/TC mounting compatibility. Choose the 10mm adjust window if you need on-site tuning of the extend end-position within a 65-75mm range. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; if position detection is required, select a magnet-equipped model. For strokes of 300mm or longer, carefully verify side-load constraints to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ40X75-10
- ✓ 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 SIJ40X75-10 FAQ
Yes, the SIJ40X75-10 is discontinued. The direct replacement is the SAIJ40X75-10, which shares the same ISO 15552 interface, 40mm bore, 75mm stroke, 10mm adjust window, and G1/4 port.
The external stop screw provides a 10mm adjust window, allowing the extend stroke to be shortened from the 75mm maximum down to 65mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ40X75-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ40X75-10 replacement — usually within 7-8 hours.