This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X140-100S, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 140mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X140-100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X140-100S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S
The AirTAC SIJ125X140-100S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 140 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 100 mm on-site, yielding a usable extend range of 40-140 mm. The direct replacement is the SAIJ125X140-100S, preserving the interface, force, and adjust window.
The stop screw strictly sets the end position and is not a load lock; the cylinder will drift on air loss, so use an external rod lock or SAIL/BSAI variant for held loads. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X140-100S |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125X140-100S 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 SAIJ125X140-100S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S Is Used
Press Fit Tuning
Allows operators to fine-tune the extend stroke on-site by up to 100 mm to dial in exact press-fit depths for varying bearing housings without changing the cylinder.
Variable Length Diverter
Adjusts the extend stop position dynamically on a sorting line to accommodate different package lengths, ensuring the diverter meets the precise edge of the product.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S with the SAIJ125X140-100S
To replace the discontinued SIJ125X140-100S, order the direct replacement SAIJ125X140-100S, matching the 125 mm bore, 140 mm nominal stroke, 100 mm adjust window, and G1/2 port. Choose the 100 mm adjust window when your application requires trimming the extend stroke anywhere from 40 mm to 140 mm. Mounting interchange via ISO 15552 dimensions supports Basic, FA, LB, and TC foot/tap options. The -S magnet enables position sensing. Because the nominal stroke is 140 mm, side-load rules requiring extra guide support for strokes >=300 mm do not apply here.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X140-100S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X140-100S FAQ
Yes, the SIJ125X140-100S is discontinued. The direct replacement is the SAIJ125X140-100S. It shares the same ISO 15552 interface, 125 mm bore, 140 mm stroke, 100 mm adjust window, and G1/2 port, but upgrades to a two Y-shaped one-way piston seal for longer life.
The external stop screw allows trimming the extend stroke by up to 100 mm on-site, giving a usable extend range of 40-140 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X140-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X140-100S replacement — usually within 7-8 hours.