This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X800SH, 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 SI125 Standard Cylinder SI125X800SH
The AirTAC SI125 Standard Cylinder SI125X800SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X800SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X800SH
- 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 SI125 Standard Cylinder SI125X800SH
The AirTAC SI125X800SH is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 800mm stroke. It delivers 6136N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI125X800SH, matching the interface, stroke and force exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This -SH variant includes a high-temp Viton H seal (0-150C) and a piston magnet for CS1-B/DS1-B switches.
Airtac SI125 Standard Cylinder SI125X800SH Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X800SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X800SH |
| Bore size | Ø125 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125X800SH carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAI125X800SH produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X800SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SI125 Standard Cylinder SI125X800SH Is Used
Heavy Stamping Press
Drives large platens in metal forming where the 6136N push force at 0.5MPa is required for deep draw operations.
Pallet Diverting
Actuates heavy-duty routing gates on high-capacity assembly lines, using the 800mm stroke to fully clear wide loads.
Automated Warehousing
Positions large tote bins in high-temperature fulfillment zones, leveraging the Viton H seals up to 150C.
Replacing the Airtac SI125 Standard Cylinder SI125X800SH with the SAI125X800SH
To replace the SI125X800SH, order the SAI125X800SH. Confirm the ISO 15552 mounting interface, G1/2 port, M27x2 rod thread and 800mm stroke. The magnet (-S) and Viton H seal (-H) carry over directly. At 0.5MPa it yields 6136N push and 5734N pull; neighbouring bores are 100mm (3927N) and 160mm (10053N). For an 800mm stroke, use external guides to prevent rod bending and side-load damage. The cushion only decelerates; it does not hold load on air loss. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X800SH
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X800SH FAQ
Yes, the AirTAC SI125X800SH is discontinued. The direct replacement is the SAI125X800SH. It is dimensionally interchangeable per ISO 15552, retaining the same 125mm bore, 800mm stroke, G1/2 port and mounting fixtures.
This double-acting cylinder uses a G1/2 port. It generates 6136N push and 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N at 0.9MPa, and a maximum theoretical force of 1251kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X800SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X800SH replacement — usually within 7-8 hours.