This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1070S, 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 SI40X1070S
The AirTAC Airtac SI40 Standard Cylinder SI40X1070S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1070mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1070S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1070 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1070S
- 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 SI40X1070S
The AirTAC SI40X1070S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 1070 mm stroke. Delivering 628 N push force at 0.5 MPa, it features a G1/4 port, M12x1.25 rod thread, and a built-in piston magnet for legacy CS1-B/DS1-B sensors. The direct replacement is the SAI40X1070S, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For applications needing load holding on air loss, the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X1070S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1070S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1070S |
| Bore size | Ø40 mm |
| Stroke | 1070 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 SAI40X1070S 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 SAI40X1070S 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 SI40X1070S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1070 | 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 SI40X1070S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with a 1070 mm reach, utilizing the 628 N thrust to reliably route heavy cartons between adjacent conveyor belts.
Extended Reach Clamping
Secures oversized workpieces at a distance in machining cells, where the 40 mm bore and 1070 mm stroke provide the necessary extension without repositioning the fixture.
Replacing the Airtac SI40 Standard Cylinder SI40X1070S with the SAI40X1070S
To replace the SI40X1070S, order the SAI40X1070S. It drops into existing fixtures via the identical ISO 15552 mounting interface, matching the 40 mm bore, 1070 mm stroke, G1/4 port, and M12x1.25 rod thread. Retain your existing mounting accessory (LB, FA, TC, etc.) and confirm the -S magnet for current AirTAC switches. Sizing both ways: if you need more force, the 50 mm bore offers 982 N push at 0.5 MPa; if less, the 32 mm bore provides 402 N. Because stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load without live air; for safety, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1070S
- ✓ 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 SI40X1070S FAQ
Yes, the SI40X1070S is discontinued. The direct replacement is the SAI40X1070S. It is dimensionally interchangeable per ISO 15552, matching the 40 mm bore, 1070 mm stroke, G1/4 port, and output force, so it fits existing fixtures perfectly.
The 40 mm bore provides 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, with a G1/4 port and 27 mm adjustable air cushions at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1070S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1070S replacement — usually within 7-8 hours.