This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-20S, 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 SIJ125X100-20S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X100-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X100-20S
- 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 SIJ125X100-20S
The AirTAC SIJ125X100-20S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, discontinued and replaced by the SAIJ125X100-20S. It uses an external stop screw to trim the extend stroke by up to 20 mm on-site, giving a usable 80-100 mm stroke. The stop sets the end position but is not a load lock.
The SAIJ direct keeps the ISO 15552 mounting interface and adds an upgraded two Y-shaped one-way piston seal for low start-up pressure. The -S suffix provides a piston magnet for CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-20S |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-20S 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 SAIJ125X100-20S 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 SIJ125X100-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SIJ125X100-20S Is Used
Press Fit Tuning
Allows exact 80-100 mm extend adjustment for pressing bearings, compensating for material thickness variations without swapping cylinders.
Variable Depth Sealing
Trims the extend stroke on-site to set precise sealing head contact depth on varying carton heights.
End-of-Line Forming
Provides adjustable mechanical end positions for metal forming, ensuring accurate stops within the 20 mm window.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20S with the SAIJ125X100-20S
To replace the discontinued SIJ125X100-20S, use the SAIJ125X100-20S direct, matching the 125 mm bore, 100 mm nominal stroke, 20 mm adjust window, G1/2 port, and FA/LB/TC mountings. Choose the 20 mm adjust window when you need precise 80-100 mm extend tuning without external stops. The -S magnet supports legacy CS1-B/DS1-B sensors. For strokes >=300 mm, verify the side-load capacity to prevent guide failure. Remember, the stop screw is not a lock; for held loads use SAIL/BSAI or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-20S
- ✓ 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 SIJ125X100-20S FAQ
Yes, the SIJ125X100-20S is discontinued. The direct replacement is the SAIJ125X100-20S, sharing the same ISO 15552 interface, 125 mm bore, 100 mm stroke, 20 mm adjust window, and G1/2 port.
The external stop screw provides a 20 mm adjust window, allowing the extend stroke to be shortened from 100 mm down to 80 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-20S replacement — usually within 7-8 hours.