This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X880, 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 SI125X880
The AirTAC SI125 Standard Cylinder SI125X880 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 880mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X880, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke880 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X880
- 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 SI125X880
The AirTAC SI125X880 is a discontinued double-acting ISO 15552 profile cylinder with an 880 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI125X880, retaining the exact bore, stroke, output force, and mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S) and cannot take a CS1-B/DS1-B sensor.
Airtac SI125 Standard Cylinder SI125X880 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X880 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X880 |
| Bore size | Ø125 mm |
| Stroke | 880 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 SAI125X880 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 SAI125X880 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 SI125X880
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×880 | 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 SI125X880 Is Used
Heavy Stamp Press Feeder
Drives heavy metal blanks into a hydraulic press over the 880 mm travel, utilizing the 6136 N push force at 0.5 MPa to overcome material friction.
Pallet Dispenser Pusher
Separates empty pallets from a stack on a conveyor line, requiring the long stroke and robust 125 mm bore to handle high friction loads.
Large Mold Lowering Actuator
Lowers heavy injection molds into place, relying on adjustable 40 mm air cushions to decelerate the substantial mass safely at stroke end.
Replacing the Airtac SI125 Standard Cylinder SI125X880 with the SAI125X880
To replace the SI125X880, order the SAI125X880. Verify the ISO 15552 mounting interface, 880 mm stroke, G1/2 port, and M27x2 rod thread. If sizing alternatives, neighboring bores offer different footprints, and at 0.5 MPa this 125 mm bore yields 6136 N push. Because the 880 mm stroke is long, use external guides to prevent rod bending and side-load wear. This non-magnetic SKU cannot support position sensing. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X880
- ✓ 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 SI125X880 FAQ
Yes, the AirTAC SI125X880 is discontinued. The direct replacement is the SAI125X880. It shares the identical ISO 15552 mounting interface, 125 mm bore, 880 mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The 125 mm bore features a G1/2 port. Force ratings are: push 6136 N and pull 5734 N at 0.5 MPa; push 8590 N at 0.7 MPa; push 11045 N at 0.9 MPa; with a theoretical max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X880
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X880 replacement — usually within 7-8 hours.