This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX50SH, 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 SI80BX50SH
The AirTAC SI80 Standard Air Cylinder SI80BX50SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX50SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX50SH
- 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 SI80BX50SH
The AirTAC SI80BX50SH is a discontinued double-acting ISO 15552 profile cylinder featuring an 80mm bore, a 50mm stroke, a SUS304 stainless piston rod, a high-temp Viton H seal, and a piston magnet. It delivers 2513 N push and 2268 N pull at 0.5 MPa. The direct replacement is the SAI80BX50SH, which shares the same G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The Viton H seal raises operating temperature to 0-150 C. Note that a plain cylinder drifts on air loss; use an external rod lock or pilot check valve for load holding.
Airtac SI80 Standard Air Cylinder SI80BX50SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX50SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX50SH |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAI80BX50SH 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 SAI80BX50SH 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 SI80BX50SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SI80BX50SH Is Used
High-Temp Clamping
Uses the SUS304 rod and Viton H seal to clamp parts reliably in hot environments up to 150 C without degrading.
Short-Stroke Pressing
Applies 2513 N of push force at 0.5 MPa for precise 50mm pressing and seating tasks in automated machinery.
Washdown Diverting
Actuates diverter gates in washdown zones where the stainless steel rod provides necessary corrosion resistance.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX50SH with the SAI80BX50SH
To replace the SI80BX50SH, order the SAI80BX50SH. Verify the ISO 15552 mounting interface, 80mm bore, 50mm stroke, G3/8 port, M20x1.5 rod thread, SUS304 rod, Viton H seal, and the -S magnet for current AirTAC switches. If sizing up or down, a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. The standard cushion is 36mm. Remember that air cushions only decelerate; they do not hold loads. For secure holding, select the SAIL air-released lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX50SH
- ✓ 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 SI80BX50SH FAQ
Yes, the SI80BX50SH is discontinued. The direct replacement is the SAI80BX50SH. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 50mm stroke, force, G3/8 port, and mounting interface.
The G3/8 port feeds a 25mm rod. At 0.5 MPa it pushes 2513 N and pulls 2268 N. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical max force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX50SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX50SH replacement — usually within 7-8 hours.