This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX135S, 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 SI80BX135S
The AirTAC SI80 Standard Air Cylinder SI80BX135S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 135mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX135S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX135S
- 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 SI80BX135S
The AirTAC SI80BX135S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 135mm stroke. Featuring a SUS304 stainless piston rod, it delivers 2513N push and 2268N pull at 0.5MPa. The direct replacement is the SAI80BX135S, sharing 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 longevity. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80BX135S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX135S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX135S |
| Bore size | Ø80 mm |
| Stroke | 135 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 SAI80BX135S 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 SAI80BX135S 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 SI80BX135S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×135 | 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 SI80BX135S Is Used
Stainless Rod Clamping
Ideal for fixture clamping in washdown environments, utilizing the SUS304 rod and 2513N thrust at 0.5MPa to secure heavy components.
Mid-Stroke Diverting
The 135mm stroke provides precise actuation for diverting products on automated lines without requiring full standard stroke lengths.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX135S with the SAI80BX135S
To replace the SI80BX135S, order the SAI80BX135S. Verify the ISO 15552 mounting interface, 135mm stroke, G3/8 port, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). The -B rod denotes SUS304 stainless steel, ideal for corrosive settings versus standard carbon steel. If sizing up or down, note the 63mm bore offers 1559N push at 0.5MPa, while the 100mm bore provides 3927N. A plain cylinder drifts on air loss; for load holding, specify the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX135S
- ✓ 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 SI80BX135S FAQ
Yes, the SI80BX135S is discontinued. The direct replacement is the SAI80BX135S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 135mm stroke, G3/8 port, and mounting interface.
This 80mm bore cylinder features a G3/8 air port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical maximum force of 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX135S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX135S replacement — usually within 7-8 hours.