This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X200-20, 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 SIJ125X200-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X200-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 200mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X200-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X200-20
- 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 SIJ125X200-20
The AirTAC SIJ125X200-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 180-200 mm stroke. The direct replacement is the SAIJ125X200-20.
The SAIJ successor shares the same ISO 15552 mounting interface, bore, and adjust window, but upgrades to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a -S magnet so it cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X200-20 |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125X200-20 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 SAIJ125X200-20 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 SIJ125X200-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SIJ125X200-20 Is Used
Press Fit Tuning
Dialing in a 180-200 mm extend stroke on-site to seat bearings without bottoming out the tooling.
Divertor Gate Adjustment
Trimming the extend position by up to 20 mm to accommodate varying package widths on a sorting line.
Pallet Stop Positioning
Fine-tuning the end stop location for different pallet depths without re-engineering the machine frame.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-20 with the SAIJ125X200-20
To replace the discontinued SIJ125X200-20, specify the direct replacement SAIJ125X200-20, which preserves the 200 mm max stroke, 20 mm adjust window, and G1/2 port. Size both ways using 0.5 MPa forces: the 100 mm bore pushes 3927 N (underpowered), while the 160 mm bore pushes 10053 N. The 20 mm adjust window is ideal for fine-tuning the extend end position without adding a separate external stop. Mounting options include FA, LB, and TC using standard ISO 15552 interface dimensions. Because this SKU has no -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; add external sensing if required. For strokes >=300 mm, verify side-load limits to prevent rod binding. The external stop screw sets end position only; it is not a lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X200-20
- ✓ 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 SIJ125X200-20 FAQ
Yes, the SIJ125X200-20 is discontinued. The direct replacement is the SAIJ125X200-20. It shares the same ISO 15552 interface, 125 mm bore, 200 mm max stroke, 20 mm adjust window, and G1/2 port, but uses an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw window is 20 mm, allowing a usable extend stroke of 180-200 mm. The stop sets end position only and is not a load lock; for held loads use an external rod lock or pilot-operated check valve.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X200-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X200-20 replacement — usually within 7-8 hours.