This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X70FTC, 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 SI80X70FTC
The AirTAC SI80 Standard Air Cylinder SI80X70FTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X70FTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X70FTC
- 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 SI80X70FTC
The AirTAC SI80X70FTC is a discontinued double-acting ISO 15552 profile cylinder with an adjustable air cushion. It delivers a thrust of 2513 N at 0.5 MPa and uses a G3/8 port. Because this legacy unit is end-of-life, you should order the direct replacement SAI80X70FTC. It shares the exact same FTC trunnion mounting, 80 mm bore, 70 mm stroke, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for longer life and lower start-up pressure. Note this specific SKU lacks a magnet and cannot accept a sensor. If your fixture needs static holding, explore the SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X70FTC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X70FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X70FTC |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAI80X70FTC 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 SAI80X70FTC 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 SI80X70FTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SI80X70FTC Is Used
Clamp Actuation
Provides 2513 N of push force at 0.5 MPa to secure heavy steel workpieces inside machining fixtures.
Pallet Stopper
Acts as a robust pneumatic stop gate for loaded pallets, utilizing the FTC trunnion mount to handle side loads.
Replacing the Airtac SI80 Standard Air Cylinder SI80X70FTC with the SAI80X70FTC
To replace the SI80X70FTC, specify the SAI80X70FTC and confirm the ISO 15552 FTC trunnion mount, 80 mm bore, 70 mm stroke, and G3/8 port. This SKU has no magnet, so it cannot support position sensing; add the -S suffix on your SAI order if you require CS1-B or DS1-B switches. If you need to resize, neighboring bores are 63 mm (1559 N push at 0.5 MPa) and 100 mm (3927 N push). Remember that a standard cylinder drifts without live air—the cushion only decelerates—so for load holding use an external pilot check valve or the BSAI clamp-lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X70FTC
- ✓ 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 SI80X70FTC FAQ
Yes, the SI80X70FTC is discontinued. The direct replacement is the SAI80X70FTC. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 70 mm stroke, G3/8 port, and FTC mounting interface.
The 80 mm bore features a G3/8 port and delivers a push of 2513 N and pull of 2268 N at 0.5 MPa. At 0.7 MPa push is 3518 N, at 0.9 MPa it is 4523 N, and the theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X70FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X70FTC replacement — usually within 7-8 hours.