This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X40CB, 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 SI80 Standard Air Cylinder SI80X40CB
The AirTAC SI80 Standard Air Cylinder SI80X40CB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X40CB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X40CB
- 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 SI80 Standard Air Cylinder SI80X40CB
The AirTAC SI80X40CB is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 40 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. Because this legacy unit is end-of-life, you should order the direct replacement: SAI80X40CB. The SAI retains the identical ISO 15552 mounting interface, CB clevis mount, M20x1.5 rod thread, and output force, fitting your existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that this specific SI80X40CB SKU lacks a magnet (-S), so it cannot accept position sensors like the legacy CS1-B or DS1-B switches.
Airtac SI80 Standard Air Cylinder SI80X40CB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X40CB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X40CB |
| Bore size | Ø80 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80X40CB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80X40CB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X40CB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SI80 Standard Air Cylinder SI80X40CB Is Used
Clamp Actuation
Provides 2513 N of push force at 0.5 MPa to secure heavy workpieces in machining fixtures.
Material Diversion
Uses the CB clevis mount to pivot a diverter arm, routing 128 kg pallets on a packaging line.
Pallet Stopping
Acts as a robust end-stop for inbound pallets, absorbing kinetic energy with its 36 mm adjustable cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X40CB with the SAI80X40CB
To replace the discontinued SI80X40CB, order the SAI80X40CB. Verify your ISO 15552 CB clevis mounting interface, 80 mm bore, 40 mm stroke, and G3/8 port. If you need position sensing, switch to an SAI80X40CBS variant, as this current SKU has no magnet. A plain cylinder drifts on air loss because the air cushion only decelerates near stroke end; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. If sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. The 25 mm rod handles the 40 mm stroke easily without side-load concerns.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X40CB
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X40CB FAQ
Yes, the SI80X40CB is discontinued. The direct replacement is the SAI80X40CB. It shares the same ISO 15552 CB mounting interface, 80 mm bore, 40 mm stroke, G3/8 port, and output force, fitting directly into existing setups.
It uses a G3/8 air port. The force ratings are: 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X40CB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X40CB replacement — usually within 7-8 hours.