This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X125LB, 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 SI160X125LB
The AirTAC SI160 Standard Cylinder SI160X125LB 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 SAI160X125LB, 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 → SAI160X125LB
- 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 SI160X125LB
The AirTAC SI160X125LB is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 125 mm stroke. It delivers a push force of 10053 N at 0.5 MPa via a G3/4 port. As a legacy unit, it must be replaced by the direct replacement SAI160X125LB, which shares the exact ISO 15552 mounting interface, bore, stroke, output force, and LB foot mounting dimensions.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this SKU lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line.
Airtac SI160 Standard Cylinder SI160X125LB Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X125LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X125LB |
| 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 SAI160X125LB 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 SAI160X125LB 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 SI160X125LB
| 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 SI160X125LB Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring high thrust, using the 10053 N push force at 0.5 MPa to form thick steel plates.
Industrial Clamp Station
Secures large fabricated structural beams during welding operations, utilizing the 50 mm adjustable air cushions to absorb heavy end-of-stroke impacts.
Replacing the Airtac SI160 Standard Cylinder SI160X125LB with the SAI160X125LB
To replace the SI160X125LB, order the SAI160X125LB. Confirm the ISO 15552 interface, the 160 mm bore, 125 mm stroke, G3/4 port, and the LB foot mounting accessory. Because this specific SKU has no -S magnet, it cannot support position sensing; order an SAI with the magnet option if switches are required. A plain cylinder drifts on air loss and its cushions only decelerate the load, so for holding loads use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. If sizing up or down, neighbouring bores are 125 mm and 200 mm. At 0.5 MPa, the 125 mm bore pushes 6136 N, while the 200 mm bore pushes 15708 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X125LB
- ✓ 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 SI160X125LB FAQ
Yes, the SI160X125LB is discontinued. The direct replacement is the SAI160X125LB. It is dimensionally interchangeable per the ISO 15552 mounting interface, matching the 160 mm bore, 125 mm stroke, G3/4 port, and LB foot mount, so it drops directly into existing fixtures.
This double-acting cylinder uses a G3/4 port. The thrust ratings are: 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, 18095 N push at 0.9 MPa, and a theoretical maximum force of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X125LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X125LB replacement — usually within 7-8 hours.