This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX95, 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 SI40AX95
The AirTAC Airtac SI40 Standard Cylinder SI40AX95 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 SAI40AX95, 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 → SAI40AX95
- 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 SI40AX95
The AirTAC SI40AX95 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 95mm stroke, delivering 628 N push force at 0.5 MPa. It features a Ø16 mm rod, M12x1.25 thread, and a G1/4 port. The direct replacement is the SAI40AX95, which matches the original bore, stroke, output force, and mounting interface.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI40AX95 uses an SUS420J2 stainless rod (-A) for corrosion resistance, but lacks a magnet, meaning it cannot accept a position switch. For load holding, note that the air cushion only decelerates; you need a pilot check valve or the SAIL lock variant.
Airtac SI40 Standard Cylinder SI40AX95 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX95 |
| 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 SAI40AX95 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 SAI40AX95 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 SI40AX95
| 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 SI40AX95 Is Used
Clamp Actuation
Drives mid-force clamping arms on machining fixtures, utilizing the 628 N push force at 0.5 MPa to secure aluminum housings during milling.
Package Diversion
Powers a 95mm stroke diverter arm on a packaging line, pushing cartons to adjacent lanes without requiring position sensing.
Gate Control
Actuates lightweight gravity roller gates, where the SUS420J2 stainless rod provides necessary corrosion resistance in humid warehouse environments.
Replacing the Airtac SI40 Standard Cylinder SI40AX95 with the SAI40AX95
To replace the discontinued SI40AX95, order the SAI40AX95. Verify the ISO 15552 mounting interface, 40mm bore, 95mm stroke, G1/4 port (PT/G/NPT), and your specific mounting accessory. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is needed. Sizing both ways: a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore yields 982 N. The 40mm bore provides 628 N push and 528 N pull at 0.5 MPa. For suspended loads, a plain cylinder drifts without live air; use an external rod lock or the SAIL/BSAI variants to hold position securely.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX95
- ✓ 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 SI40AX95 FAQ
Yes, the SI40AX95 is discontinued. The direct replacement is the SAI40AX95. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 95mm stroke, 628 N force, G1/4 port, and mounting fixtures.
The bore is 40mm with a G1/4 port. Force output is 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. Operating speed is 30-800 mm/s.
Request a Quote for the SAI40AX95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX95 replacement — usually within 7-8 hours.