This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1170, 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 SI125X1170
The AirTAC SI125 Standard Cylinder SI125X1170 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 SAI125X1170, 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 → SAI125X1170
- 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 SI125X1170
The AirTAC SI125X1170 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 1170 mm stroke. It delivers a thrust of 6136 N at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI125X1170, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this non-magnet SKU cannot accept a sensor, and the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI125 Standard Cylinder SI125X1170 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1170 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1170 |
| 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 SAI125X1170 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 SAI125X1170 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 SI125X1170
| 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 SI125X1170 Is Used
Heavy Material Transfer
Drives large pallets or heavy fixtures over 1170 mm on assembly lines, utilizing the 6136 N push force at 0.5 MPa to shift substantial loads.
Automated Warehousing
Actuates long-travel lifting or pusher mechanisms in high-bay storage systems, requiring external guides to manage the 1170 mm stroke side-loads.
Large Press Loading
Feeds heavy sheet metal or blanks into large industrial presses, where the robust 125 mm bore and 5734 N pull force handle dense workpieces.
Replacing the Airtac SI125 Standard Cylinder SI125X1170 with the SAI125X1170
To replace the SI125X1170, order the SAI125X1170. Verify your ISO 15552 mounting accessory (LB, FA, CA, TC), the G1/2 air port thread (PT/G/NPT), and the M27x2 rod thread. Because this SKU lacks a magnet, it cannot take a CS1-B/DS1-B sensor; if sensing is required, specify an SAI with the magnet option. The 1170 mm stroke demands external guides to prevent rod bending and side-load damage. Sizing both ways: if 6136 N push at 0.5 MPa is insufficient, step up to a 160 mm bore; if oversized, a 100 mm bore provides 3927 N. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1170
- ✓ 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 SI125X1170 FAQ
Yes, the SI125X1170 is discontinued. The direct replacement is the AirTAC SAI125X1170. It is dimensionally interchangeable per ISO 15552, matching the 125 mm bore, 1170 mm stroke, output force, G1/2 port, and mounting interface, so it fits existing fixtures directly.
This double-acting cylinder uses a G1/2 air port. It delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa the push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical maximum force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1170
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1170 replacement — usually within 7-8 hours.