This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1000SH, 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 SI125X1000SH
The AirTAC SI125 Standard Cylinder SI125X1000SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1000SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1000SH
- 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 SI125X1000SH
The AirTAC SI125X1000SH is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 1000mm stroke. Delivering 6136N push force at 0.5MPa, it features a G1/2 port, M27x2 rod thread, and a high-temp Viton H seal rated for 0-150C. The direct replacement is the SAI125X1000SH, matching the interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with CS1-B/DS1-B sensors. For load holding, the SAIL or BSAI lock variants are needed, as cushions only decelerate.
Airtac SI125 Standard Cylinder SI125X1000SH Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1000SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1000SH |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAI125X1000SH 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 SAI125X1000SH 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 SI125X1000SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SI125X1000SH Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 6136N push force at 0.5MPa over a 1000mm travel distance.
Pallet Transfer Unit
Shifts loaded pallets along extended 1000mm conveyor sections, utilizing the G1/2 port for rapid actuation.
High-Temp Ejector
Ejects molded parts in 0-150C environments using the Viton H seal, relying on 5734N pull force.
Replacing the Airtac SI125 Standard Cylinder SI125X1000SH with the SAI125X1000SH
To replace the SI125X1000SH, order the SAI125X1000SH direct equivalent, verifying the ISO 15552 mounting interface, G1/2 port, M27x2 thread, and -S magnet. The -H Viton seal handles 0-150C. Sizing both ways: a 100mm bore yields 3927N push at 0.5MPa, while a 160mm bore yields 10053N. At 0.7MPa this 125mm bore outputs 8590N. For the 1000mm stroke, use external guides to prevent rod bending and side loads. A plain cylinder drifts without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. Speed is 30-500mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1000SH
- ✓ 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 SI125X1000SH FAQ
Yes, the SI125X1000SH is discontinued. The direct replacement is the SAI125X1000SH. It is dimensionally interchangeable per ISO 15552, matching the 125mm bore, 1000mm stroke, G1/2 port, and mounting fixtures.
The G1/2 port bore delivers 6136N push and 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N at 0.9MPa, and a max of 1251kgf at 1.0MPa. It operates at 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1000SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1000SH replacement — usually within 7-8 hours.