This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X430, 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 SI125X430
The AirTAC SI125 Standard Cylinder SI125X430 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 430mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X430, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke430 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X430
- 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 SI125X430
The AirTAC SI125X430 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 430 mm stroke. It delivers 6136 N push and 5734 N pull at 0.5 MPa, peaking at 1251 kgf. The direct replacement is the SAI125X430, matching the G1/2 port, M27x2 rod thread, and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot take a sensor. For locked loads, explore the SAIL or BSAI variants, as standard cushions only decelerate.
Airtac SI125 Standard Cylinder SI125X430 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X430 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X430 |
| Bore size | Ø125 mm |
| Stroke | 430 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 SAI125X430 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 SAI125X430 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 SI125X430
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×430 | 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 SI125X430 Is Used
Heavy Press Stamping
Ideal for driving heavy press tools where 6136 N of push force at 0.5 MPa is required to form or stamp thick materials.
Pallet Diverting
Provides the robust stroke and high force needed to divert heavy loaded pallets along automated warehouse conveyor lines.
Large Gate Actuation
Actuates large industrial material handling gates, utilizing the 430 mm stroke and 5734 N pull force for secure positioning.
Replacing the Airtac SI125 Standard Cylinder SI125X430 with the SAI125X430
To replace the SI125X430, order the SAI125X430 keeping the identical 125 mm bore, 430 mm stroke, G1/2 port, and ISO 15552 mounting. If sizing down, a 100 mm bore yields 3927 N push at 0.5 MPa; sizing up to 160 mm provides 10053 N. This no-magnet SKU cannot accept a CS1-B/DS1-B sensor. Because the 430 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Rod material options include carbon steel, SUS420J2, and SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X430
- ✓ 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 SI125X430 FAQ
Yes, the SI125X430 is discontinued. The direct replacement is the SAI125X430. It is dimensionally interchangeable per ISO 15552, matching the 125 mm bore, 430 mm stroke, G1/2 port, and mounting fixtures.
This double-acting cylinder has a G1/2 port. It generates 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 max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X430
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X430 replacement — usually within 7-8 hours.