This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X1400-20, 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 SIJ125X1400-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X1400-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X1400-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X1400-20
- 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 SIJ125X1400-20
The AirTAC SIJ125X1400-20 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and superseded by the direct replacement SAIJ125X1400-20. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 1380-1400 mm stroke (the 1400 mm nominal is the maximum). The SAIJ upgrade retains the exact interface, force, and adjust window.
The SAIJ replacement introduces an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot take a sensor. The stop screw sets end position only; it is not a load lock. On air loss, the piston drifts, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1400-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1400-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X1400-20 |
| Bore size | Ø125 mm |
| Stroke | 1400 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 SAIJ125X1400-20 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 SAIJ125X1400-20 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 SIJ125X1400-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1400 | 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 SIJ125X1400-20 Is Used
Long-Reach Press Trim
Field-tunes the final 20 mm of a 1400 mm extend stroke to seat large press tools accurately without machining custom spacers.
Large Assembly Standoff
Sets precise 1380-1400 mm end positions for locating heavy assemblies, using the external stop screw to compensate for fixture tolerances.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1400-20 with the SAIJ125X1400-20
The 20 mm adjust window is ideal for fine-tuning the extend end position without shims. Mounting options include Basic, FA, LB, and TC. Because this SKU has no -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For the 1400 mm stroke, use external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X1400-20
- ✓ 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 SIJ125X1400-20 FAQ
Yes, the SIJ125X1400-20 is discontinued. The SAIJ family also adds an upgraded two-piece Y-shaped piston seal.
The external stop screw provides a 20 mm adjust window, shortening the extend stroke from 1400 mm down to 1380 mm. The stop sets end position only and is not a load lock; use an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X1400-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X1400-20 replacement — usually within 7-8 hours.