This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1650H, 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 SI80X1650H
The AirTAC SI80 Standard Air Cylinder SI80X1650H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1650H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1650H
- 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 SI80X1650H
The AirTAC SI80X1650H is a discontinued double-acting ISO 15552 profile cylinder featuring a high-temperature Viton H seal (0-150 C). It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. Because this 1650 mm stroke exceeds the 1500 mm standard maximum, it is a non-standard, made-to-order unit requiring external guide support to prevent rod bending. As this SKU lacks the -S magnet, it cannot accept a position sensor.
AirTAC replaced the SI with the SAI80X1650H direct. It shares the exact ISO 15552 mounting interface, bore, stroke, force and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds lock variants (SAIL, BSAI) the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X1650H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1650H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1650H |
| Bore size | Ø80 mm |
| Stroke | 1650 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 SAI80X1650H 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 SAI80X1650H 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 SI80X1650H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1650 | 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 SI80X1650H Is Used
High-Temperature Forming
Uses the Viton H seal to withstand 0-150 C ambient heat in automotive rubber moulding lines, providing 2513 N push at 0.5 MPa.
Extended-Reach Transfer
Handles long 1650 mm stroke requirements for pushing pallets across wide conveyor gaps, necessitating external guides to prevent rod bending.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1650H with the SAI80X1650H
To replace this SI80X1650H, order the SAI80X1650H direct. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC), the G3/8 port, and the M20x1.5 rod thread. Since this is a non-standard 1650 mm stroke (exceeding the 1500 mm max standard), expect made-to-order lead times and ensure external guides are used to mitigate side-load and rod-bending risks. To size both ways: the neighbouring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. This plain cylinder does not hold load without live air (cushions only decelerate); for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Note: this no-S SKU cannot take a magnetic switch.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1650H
- ✓ 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 SI80X1650H FAQ
Yes, the SI80X1650H is discontinued. The direct replacement is the SAI80X1650H. It is dimensionally interchangeable per ISO 15552, matching the bore, 1650 mm stroke, 2513 N force, G3/8 port, and mounting fixtures.
It features a G3/8 port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The SAI upgrade uses two Y-shaped piston seals for lower start-up pressure.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1650H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1650H replacement — usually within 7-8 hours.