This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X110H, 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 SI125X110H
The AirTAC SI125 Standard Cylinder SI125X110H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 110mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X110H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X110H
- 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 SI125X110H
The AirTAC SI125X110H is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 110 mm stroke. As a high-force unit it delivers 6136 N push and 5734 N pull at 0.5 MPa, utilizing a G1/2 port and M27x2 rod thread. Because this legacy SI series is end-of-life, you should order the direct replacement: the SAI125X110H. The SAI family matches the ISO 15552 mounting interface, bore, output force, and port size, dropping directly into existing fixtures.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This -H variant uses a Viton FKM seal, raising the operating temperature range to 0-150 C. Note this SKU lacks a magnet, so it cannot accept CS1-B or DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X110H Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X110H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X110H |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAI125X110H 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 SAI125X110H 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 SI125X110H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SI125X110H Is Used
Heavy Stamp Pressing
Ideal for driving large stamping or forming dies, delivering 6136 N of push force at 0.5 MPa to shape heavy-gauge metal components reliably.
High-Temp Actuation
The Viton H seal option allows deployment in hot environments up to 150 C, such as near ovens or drying tunnels, where standard NBR seals would fail.
Replacing the Airtac SI125 Standard Cylinder SI125X110H with the SAI125X110H
To replace the discontinued SI125X110H, order the SAI125X110H, confirming the ISO 15552 mounting interface, 110 mm stroke, and G1/2 port. Specify your mounting accessory (LB foot, FA flange, or TC trunnion) and note this non-magnetic SKU cannot support position sensing. When sizing both ways, neighboring bores offer different force classes: 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. Remember a standard cylinder drifts without live air, as the 40 mm adjustable cushion only decelerates the load near stroke end; for load holding on air loss, specify an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X110H
- ✓ 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 SI125X110H FAQ
Yes, the AirTAC SI125X110H is discontinued. The direct replacement is the SAI125X110H. It is dimensionally interchangeable per ISO 15552, matching the 125 mm bore, 110 mm stroke, G1/2 port, and mounting interface, so it fits existing machinery without modification.
This double-acting cylinder uses a G1/2 air port and generates 6136 N push and 5734 N pull at 0.5 MPa. At 0.7 MPa it pushes 8590 N, and 11045 N at 0.9 MPa. The theoretical maximum force is 1251 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X110H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X110H replacement — usually within 7-8 hours.