This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X175-50, 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 SIJ125X175-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X175-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 175mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X175-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X175-50
- 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 SIJ125X175-50
The AirTAC SIJ125X175-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. A G1/2 port, 32mm rod, and 40mm adjustable cushion frame a 175mm nominal stroke that an external stop screw trims by up to 50mm on-site, yielding a 125-175mm extend window. The direct replacement is the SAIJ125X175-50, preserving the bore, force, port, and mounting interface.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet (-S) and cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X175-50 |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125X175-50 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 SAIJ125X175-50 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 SIJ125X175-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SIJ125X175-50 Is Used
Press Fit Tuning
Dialing in exact insertion depth on a 313 kg assembly where the 50mm stop window allows field tweaking without machining new hard stops.
Variable Length Diverter
Rejecting different carton sizes on a line by adjusting the extend stroke from 175mm down to 125mm on-site to match package dimensions.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-50 with the SAIJ125X175-50
To replace the discontinued SIJ125X175-50, specify SAIJ125X175-50 for an direct. The -50 adjust window gives a 125-175mm extend range; if you need less tuning, choose a smaller window. Mounting reuses ISO 15552 interface dimensions (FA, LB, TC). Because this SKU has no -S suffix, it cannot accept a magnetic switch. For strokes at or above 300mm, verify side-load guidance to prevent rod bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X175-50
- ✓ 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 SIJ125X175-50 FAQ
Yes, the SIJ125X175-50 is discontinued. The direct replacement is the SAIJ125X175-50. It matches the ISO 15552 interface, 125mm bore, 175mm stroke, 50mm adjust window, G1/2 port, and mounting, while adding an upgraded two Y-shaped one-way piston seal.
The external stop screw shortens the extend stroke by up to 50mm on-site, giving a usable 125-175mm range. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X175-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X175-50 replacement — usually within 7-8 hours.