This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X700TC, 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 SI125X700TC
The AirTAC SI125 Standard Cylinder SI125X700TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 700mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X700TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X700TC
- 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 SI125X700TC
The AirTAC SI125X700TC is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 700mm stroke. It delivers 6136N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI125X700TC, matching the TC trunnion mount, M27x2 rod thread, and 40mm cushions.
Upgrading to the SAI brings a two Y-shaped one-way piston seal for low start-up pressure. This no-magnet SKU cannot take a sensor; for load holding use the SAIL or BSAI lock variants, as cushions only decelerate.
Airtac SI125 Standard Cylinder SI125X700TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X700TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X700TC |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAI125X700TC 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 SAI125X700TC 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 SI125X700TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SI125X700TC Is Used
Heavy Press Actuation
Drives large press platens requiring 6136N push force at 0.5MPa, utilizing the 700mm stroke to fully open the tooling area for material loading.
Bulk Material Diversion
Swings heavy diverter arms on sorting lines, using the TC trunnion mount to handle the 125mm bore torque during high-speed package routing.
Replacing the Airtac SI125 Standard Cylinder SI125X700TC with the SAI125X700TC
To replace the SI125X700TC, order the SAI125X700TC and verify the ISO 15552 TC trunnion interface, 125mm bore, 700mm stroke, G1/2 port, and M27x2 thread. Since this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. For sizing, the 6136N push at 0.5MPa handles heavy loads, while a neighbouring 100mm bore offers 3927N. At 700mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for fail-safe load holding, specify an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X700TC
- ✓ 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 SI125X700TC FAQ
Yes, the SI125X700TC is discontinued. The direct replacement is the SAI125X700TC. It features the same ISO 15552 mounting interface, 125mm bore, 700mm stroke, 6136N force, G1/2 port, and TC trunnion mount, fitting existing fixtures perfectly.
The 125mm bore uses a G1/2 port. At 0.5MPa it provides 6136N push and 5734N pull force. At 0.7MPa push is 8590N, and at 0.9MPa it is 11045N. The theoretical maximum force is 1251kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X700TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X700TC replacement — usually within 7-8 hours.