This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX95S, 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 SI40 Standard Cylinder SI40AX95S
The AirTAC Airtac SI40 Standard Cylinder SI40AX95S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 95mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX95S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX95S
- 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 SI40 Standard Cylinder SI40AX95S
The AirTAC SI40AX95S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 95 mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40AX95S, matching the exact ISO 15552 mounting interface, force, and stroke.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -A variant uses a SUS420J2 stainless steel rod, and the -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40AX95S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX95S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX95S |
| Bore size | Ø40 mm |
| Stroke | 95 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 SAI40AX95S 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 SAI40AX95S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40AX95S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×95 | 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 SI40 Standard Cylinder SI40AX95S Is Used
Component Clamping
Secures mid-weight machined parts during milling or drilling, utilizing the 628 N push force and 95 mm travel to firmly hold workpieces without deflecting.
Package Diverting
Actuates routing gates on packaging lines, providing fast 95 mm strokes to redirect cartons at speeds up to 800 mm/s.
Replacing the Airtac SI40 Standard Cylinder SI40AX95S with the SAI40AX95S
To replace the discontinued SI40AX95S, order the SAI40AX95S. Verify the ISO 15552 mounting interface, 95 mm stroke, G1/4 port, and your specific mounting accessory. The -S magnet enables current AirTAC switches, replacing the legacy CS1-B/DS1-B. If you need more force than the 628 N push at 0.5 MPa, step up to the 50 mm bore (982 N). If less force is needed, the 32 mm bore (402 N) fits. Note that a plain cylinder does not hold load on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant offers a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX95S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40AX95S FAQ
Yes, the SI40AX95S is discontinued. The direct replacement is the SAI40AX95S. It is dimensionally interchangeable per ISO 15552, maintaining the same 40 mm bore, 95 mm stroke, G1/4 port, and mounting interface.
This double-acting cylinder features a G1/4 air port. The thrust ratings are 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX95S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX95S replacement — usually within 7-8 hours.