This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X80SCB, 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 SI40X80SCB
The AirTAC Airtac SI40 Standard Cylinder SI40X80SCB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X80SCB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X80SCB
- 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 SI40X80SCB
The AirTAC SI40X80SCB is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 80mm stroke, and CB clevis mounting. Delivering 628N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI40X80SCB. This direct successor matches the exact interface, bore, stroke, force, and mounting hardware.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S magnet supports legacy CS1-B/DS1-B sensors. The SAI family also introduces SAIL and BSAI lock variants absent from the SI line.
Airtac SI40 Standard Cylinder SI40X80SCB Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X80SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X80SCB |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAI40X80SCB 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 SAI40X80SCB 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 SI40X80SCB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SI40X80SCB Is Used
Package Diverting
Ideal for actuating routing gates on packaging lines, utilizing the 80mm stroke and 628N push force to redirect cartons reliably.
Clamp Actuation
Provides secure holding force for mid-sized machining fixtures, with the CB clevis allowing pivoting alignment during clamping.
Vertical Lift Stops
Suitable for lifting light pallets or stopping goods at 32kg vertical lift capacity, safely operating within the 377N working load.
Replacing the Airtac SI40 Standard Cylinder SI40X80SCB with the SAI40X80SCB
To replace the SI40X80SCB, order the SAI40X80SCB. Confirm the ISO 15552 mounting interface, 40mm bore, 80mm stroke, G1/4 port, and CB clevis accessory. The -S magnet enables CS1-B/DS1-B switches. Sizing both ways: a 32mm bore yields 402N push, while a 50mm bore yields 982N at 0.5MPa. For load holding, note a plain cylinder drifts on air loss; the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SAIF self-valve option is also available for 32-100mm bores.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X80SCB
- ✓ 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 SI40X80SCB FAQ
Yes, the SI40X80SCB is discontinued. The direct replacement is the SAI40X80SCB, which shares the same ISO 15552 mounting interface, 40mm bore, 80mm stroke, G1/4 port, and CB clevis mount.
It features a G1/4 air port. The force ratings are: 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a maximum theoretical force of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X80SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X80SCB replacement — usually within 7-8 hours.