This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX175, 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 SI40AX175
The AirTAC Airtac SI40 Standard Cylinder SI40AX175 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 175mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX175, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX175
- 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 SI40AX175
The AirTAC SI40AX175 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 175mm stroke. It delivers 628N push and 528N pull at 0.5MPa, utilizing a G1/4 port and an M12x1.25 rod thread. AirTAC replaced this legacy unit with the SAI40AX175, a direct upgrade retaining the exact ISO 15552 mounting interface, force, and dimensions.
The SAI40AX175 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SKU uses an SUS420J2 stainless steel rod (A suffix) for corrosion resistance, but lacks a magnet (-S) so it cannot accept position switches.
Airtac SI40 Standard Cylinder SI40AX175 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX175 |
| Bore size | Ø40 mm |
| Stroke | 175 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 SAI40AX175 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 SAI40AX175 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 SI40AX175
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SI40AX175 Is Used
Stainless Rod Clamping
Ideal for mid-force clamping tasks where the SUS420J2 stainless rod offers better corrosion resistance than standard carbon steel in humid production areas.
175mm Divert Stroke
Provides a compact 175mm stroke for diverting packages on a conveyor line, yielding 628N of push force at 0.5MPa to reliably shift medium-weight goods.
Replacing the Airtac SI40 Standard Cylinder SI40AX175 with the SAI40AX175
To replace the SI40AX175, order the SAI40AX175. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the 175mm stroke, and the G1/4 port. Because this SKU lacks a magnet, it cannot support CS1-B/DS1-B sensors; if sensing is needed, switch to an -S SAI variant. If you need to size up or down, neighboring bores are 32mm (402N push @0.5MPa) and 50mm (982N push @0.5MPa). Note that a plain double-acting cylinder drifts without live air; for load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX175
- ✓ 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 SI40AX175 FAQ
Yes, the AirTAC SI40AX175 is discontinued. The direct replacement is the SAI40AX175. It shares the identical ISO 15552 mounting interface, 40mm bore, 175mm stroke, G1/4 port, and force output, fitting directly into existing fixtures.
The 40mm bore features a G1/4 air port and an M12x1.25 rod thread. Force output is 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX175
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX175 replacement — usually within 7-8 hours.