This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X125STC, 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 SI160 Standard Cylinder SI160X125STC
The AirTAC SI160 Standard Cylinder SI160X125STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X125STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X125STC
- 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 SI160 Standard Cylinder SI160X125STC
The AirTAC SI160X125STC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 125 mm stroke. It delivers 10053 N push force at 0.5 MPa and features a G3/4 port, M36x2 rod thread, and 50 mm adjustable air cushions. The direct replacement is the SAI160X125STC, which shares the same TC trunnion mounting, output force, and interface dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line, and the -S magnet on this unit works with legacy CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160X125STC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X125STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X125STC |
| Bore size | Ø160 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI160X125STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAI160X125STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI160 Standard Cylinder SI160X125STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×125 | 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 SI160 Standard Cylinder SI160X125STC Is Used
Heavy Press Clamping
Ideal for exerting massive steady pressure on large metal or composite fabrication parts, utilizing the 10053 N push force at just 0.5 MPa.
Pallet Positioning
Shifts loaded pallets or heavy material platforms horizontally, where the 9425 N pull force and TC trunnion mount handle substantial guiding loads.
Industrial Door Actuation
Drives large automated blast doors or heavy industrial gates, benefiting from the 50 mm adjustable cushions to smoothly stop the high moving mass.
Replacing the Airtac SI160 Standard Cylinder SI160X125STC with the SAI160X125STC
To replace the SI160X125STC, order the SAI160X125STC with the exact 160 mm bore, 125 mm stroke, TC trunnion mount, G3/4 port, and -S magnet. The SAI is dimensionally interchangeable per ISO 15552. If sizing up or down, neighbouring bores are 125 mm and 200 mm; at 0.5 MPa, this 160 mm bore pushes 10053 N and pulls 9425 N. Because the stroke is 125 mm, side-load rod-bending risks are low, but ensure adequate guiding. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B); seal options include NBR N or high-temp Viton H.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X125STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI160 Standard Cylinder SI160X125STC FAQ
Yes, the AirTAC SI160X125STC is discontinued. The direct replacement is the SAI160X125STC. It is dimensionally interchangeable per ISO 15552, maintaining the exact same 160 mm bore, 125 mm stroke, TC mount, G3/4 port, and force ratings.
At 0.5 MPa it pushes 10053 N and pulls 9425 N. At 0.7 MPa it pushes 14074 N, and 18095 N at 0.9 MPa. The theoretical max force is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, and the air port is G3/4.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X125STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X125STC replacement — usually within 7-8 hours.