This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X200-50, 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 SIJ125X200-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X200-50 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 SAIJ125X200-50, 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 → SAIJ125X200-50
- 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 SIJ125X200-50
The AirTAC SIJ125X200-50 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 200 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 150-200 mm extension. Operating speed spans 30-500 mm/s.
This SIJ series is discontinued; the direct replacement is the SAIJ125X200-50, retaining the identical interface, bore, stroke, force, and mounting. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. As this SKU lacks a -S magnet, it cannot accept a magnetic switch. Note the stop screw sets end position only—it is not a load lock; use SAIL or an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X200-50 |
| 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 SAIJ125X200-50 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 SAIJ125X200-50 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 SIJ125X200-50
| 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 SIJ125X200-50 Is Used
Press Tonnage Calibration
Light-duty press operations needing field stroke tuning to accommodate varying material thicknesses, using the 50 mm stop screw to set a precise 150-200 mm extend endpoint.
Heavy Transfer Diverter
Diverting large payloads on a conveyor where the extend position must be dialed in on-site to match fixed guarding without re-piping the G1/2 air connections.
Pallet Stopper Adjustment
Acting as an adjustable pallet stop in high-flow logistics, allowing maintenance teams to trim the extend stroke by up to 50 mm as pallet dimensions change.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X200-50 with the SAIJ125X200-50
To replace the discontinued SIJ125X200-50, order the direct replacement SAIJ125X200-50, ensuring you reuse your existing ISO 15552 FA, LB, or TC mounting hardware. The 50 mm adjust window is ideal if your end position requires field tuning between 150 and 200 mm. Because this SKU has no -S suffix, it cannot support legacy CS1-B/DS1-B sensors. For stroke lengths of 300 mm or greater, carefully verify side-load limits to prevent rod distortion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X200-50
- ✓ 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 SIJ125X200-50 FAQ
Yes, the SIJ125X200-50 is discontinued. The direct replacement is the SAIJ125X200-50, which shares the identical ISO 15552 interface, 125 mm bore, 200 mm stroke, 50 mm adjust window, G1/2 port, and mounting options. The SAIJ family also upgrades the piston seal to a two Y-shaped one-way element design.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the 200 mm nominal extend stroke down to 150 mm on-site. The stop sets end position only and does not lock the load.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X200-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X200-50 replacement — usually within 7-8 hours.