This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X410TC, 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 SI125X410TC
The AirTAC SI125 Standard Cylinder SI125X410TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 410mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X410TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke410 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X410TC
- 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 SI125X410TC
The AirTAC SI125X410TC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 410 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI125X410TC, matching the exact TC trunnion mount, M27x2 thread, and output force.
The SAI upgrade features a redesigned piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this non-magnet SKU cannot accept a sensor, and the SAI family introduces SAIL and BSAI lock variants absent in the legacy SI line.
Airtac SI125 Standard Cylinder SI125X410TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X410TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X410TC |
| Bore size | Ø125 mm |
| Stroke | 410 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 SAI125X410TC 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 SAI125X410TC 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 SI125X410TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×410 | 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 SI125X410TC Is Used
Heavy Stamping Press
Drives large platens and tooling dies where the 6136 N push force at 0.5 MPa is required to form thick metal components securely.
Bulk Material Diversion
Actuates heavy-duty flow gates on high-capacity aggregate lines, relying on the robust 32 mm rod and TC trunnion mount.
Replacing the Airtac SI125 Standard Cylinder SI125X410TC with the SAI125X410TC
To replace the SI125X410TC, order the SAI125X410TC. Verify the ISO 15552 TC trunnion interface, 125 mm bore, 410 mm stroke, and G1/2 port. Because this SKU lacks the -S magnet, it cannot support CS1-B/DS1-B sensors; order a magnet-equipped SAI if position detection is needed. For sizing, neighboring bores offer different forces: the 100 mm bore provides 3927 N push at 0.5 MPa, while the 160 mm bore yields 10053 N. At 0.7 MPa this 125 mm bore generates 8590 N. For the 410 mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X410TC
- ✓ 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 SI125X410TC FAQ
Yes, the SI125X410TC is discontinued. The direct replacement is the SAI125X410TC. It shares the identical ISO 15552 mounting interface, 125 mm bore, 410 mm stroke, G1/2 port, and output force, fitting directly into existing TC trunnion fixtures.
This 125 mm bore cylinder features a G1/2 air port, a 32 mm rod, and an M27x2 thread. It delivers 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical maximum of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X410TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X410TC replacement — usually within 7-8 hours.