This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X175TC, 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 SI40X175TC
The AirTAC SI40 Standard Cylinder SI40X175TC 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 SAI40X175TC, 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 → SAI40X175TC
- 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 SI40X175TC
The AirTAC SI40X175TC is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 175 mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40X175TC, matching the bore, stroke, force, port, and TC trunnion mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot accept a sensor.
Airtac SI40 Standard Cylinder SI40X175TC Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X175TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X175TC |
| 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 SAI40X175TC 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 SAI40X175TC 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 SI40X175TC
| 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 SI40X175TC Is Used
Package Diverting
Actuates routing gates on packaging lines using the 175 mm stroke and 628 N push force to redirect cartons efficiently.
Clamp Actuation
Provides reliable clamping pressure for light machining fixtures, utilizing the TC trunnion mount for pivot alignment.
Material Stopping
Deploys mechanical stops at conveyor transfer points, handling loads safely within its 32 kg vertical lift capacity.
Replacing the Airtac SI40 Standard Cylinder SI40X175TC with the SAI40X175TC
To replace the SI40X175TC, order the SAI40X175TC. Verify the ISO 15552 TC trunnion mount, 40 mm bore, 175 mm stroke, and G1/4 port (PT/G/NPT thread options). Because this specific SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI if position sensing is required. At 0.5 MPa it pushes 628 N; if undersized, the 50 mm bore pushes 982 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X175TC
- ✓ 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 SI40X175TC FAQ
Yes, the SI40X175TC is discontinued. The direct replacement is the SAI40X175TC. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 175 mm stroke, G1/4 port, and TC mounting interface.
The 40 mm bore features a G1/4 air port and M12x1.25 rod thread. It delivers 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 max of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X175TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X175TC replacement — usually within 7-8 hours.