This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1170S, 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 SI125X1170S
The AirTAC SI125 Standard Cylinder SI125X1170S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1170mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1170S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1170S
- 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 SI125X1170S
The AirTAC SI125X1170S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 1170 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI125X1170S, matching the exact ISO 15552 mounting interface, stroke, and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model uses CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI125 Standard Cylinder SI125X1170S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1170S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1170S |
| Bore size | Ø125 mm |
| Stroke | 1170 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 SAI125X1170S 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 SAI125X1170S 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 SI125X1170S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1170 | 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 SI125X1170S Is Used
Heavy Material Transfer
Drives large pallets or heavy assemblies over 1170 mm distances where 6136 N of thrust at 0.5 MPa is required to overcome initial inertia.
Automated Warehousing
Acts as a main pusher or diverter for substantial loads, utilizing the 125 mm bore capacity to shift weighted totes reliably.
Large Press Feed
Feeds heavy stock or tooling components into large machinery, depending on adjustable air cushions to decelerate at stroke ends.
Replacing the Airtac SI125 Standard Cylinder SI125X1170S with the SAI125X1170S
To replace the SI125X1170S, order the SAI125X1170S. Verify the ISO 15552 mounting accessory (LB, FA, TC), the G1/2 port, and the -S magnet. For sizing both ways: a 100 mm bore yields 3927 N [email protected], while a 160 mm bore yields 10053 N. The 1170 mm stroke requires external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1170S
- ✓ 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 SI125X1170S FAQ
Yes, the SI125X1170S is discontinued. The direct replacement is the SAI125X1170S. It is dimensionally interchangeable per ISO 15552, maintaining the same 125 mm bore, 1170 mm stroke, output force, G1/2 port, and mounting interface.
The G1/2 port feeds a 32 mm rod delivering 6136 N push and 5734 N pull at 0.5 MPa. At 0.7 MPa push is 8590 N, and 11045 N at 0.9 MPa. The theoretical max is 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1170S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1170S replacement — usually within 7-8 hours.