This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X70H, 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 SI80X70H
The AirTAC SI80 Standard Air Cylinder SI80X70H 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 SAI80X70H, 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 → SAI80X70H
- 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 SI80X70H
The AirTAC SI80X70H is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 70 mm stroke. It delivers 2513 N push force at 0.5 MPa. Because this legacy unit is end-of-life, order the SAI80X70H direct replacement. It shares the exact ISO 15552 mounting interface, G3/8 port, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI80X70H variant uses Viton H seals for 0-150 C high-temperature service. As a non-magnet SKU, it cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80X70H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X70H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X70H |
| 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 SAI80X70H 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 SAI80X70H 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 SI80X70H
| 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 SI80X70H Is Used
High-Temperature Forming
Drives press tooling in hot environments using Viton H seals rated for 0-150 C, providing 2513 N of thrust at 0.5 MPa.
Heavy Part Ejection
Pushes molded components out of machinery with 3518 N force at 0.7 MPa, utilizing the 25 mm piston rod for stability.
Replacing the Airtac SI80 Standard Air Cylinder SI80X70H with the SAI80X70H
To replace the discontinued SI80X70H, order the SAI80X70H. Verify the ISO 15552 mounting interface, the 80 mm bore, 70 mm stroke, G3/8 port, and your Viton H high-temperature seal requirement. Because this SKU lacks a magnet (-S), it cannot accept position sensors; if sensing is needed, switch to an SAI80X70HS. Sizing options: step down to a 63 mm bore for lighter loads (1559 N push @0.5 MPa) or up to 100 mm for heavier tasks (3927 N). Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X70H
- ✓ 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 SI80X70H FAQ
Yes, the AirTAC SI80X70H is discontinued. The direct replacement is the SAI80X70H. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 70 mm stroke, G3/8 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure.
The 80 mm bore has a 25 mm rod, M20x1.5 thread, G3/8 port, and 36 mm cushions. Force ratings are: push 2513 N and pull 2268 N at 0.5 MPa; push 3518 N at 0.7 MPa; push 4523 N at 0.9 MPa; with a theoretical max of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI80X70H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X70H replacement — usually within 7-8 hours.