This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X165-50S, 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 SIJ125X165-50S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X165-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 165mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X165-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X165-50S
- 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 SIJ125X165-50S
The AirTAC SIJ125X165-50S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 115-165 mm range. This SIJ model is discontinued; the direct replacement is the SAIJ125X165-50S.
The SAIJ successor retains the ISO 15552 mounting interface, bore, stroke, and force, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X165-50S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X165-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X165-50S |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125X165-50S 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 SAIJ125X165-50S 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 SIJ125X165-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SIJ125X165-50S Is Used
Press Fit Tuning
Allows operators to fine-tune the extend stroke on-site for pressing bearings, ensuring exact insertion depth without changing the cylinder.
Variable Diverter Stroke
Adjusts the pusher end position on a sorting line to handle different package sizes using the 50 mm trim window.
Pallet Positioning
Sets precise end stops for pallet engagement, trimming the extend stroke by up to 50 mm to accommodate varying pallet depths.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X165-50S with the SAIJ125X165-50S
To replace the discontinued SIJ125X165-50S, order the SAIJ125X165-50S. It is a direct swap keeping the 125 mm bore, 165 mm nominal stroke, 50 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 50 mm adjust window if your extend stroke needs on-site tuning between 115 and 165 mm. Mounting options include FA, LB, and TC. The -S magnet supports legacy CS1-B/DS1-B switches. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X165-50S
- ✓ 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 SIJ125X165-50S FAQ
Yes, the SIJ125X165-50S is discontinued. The direct replacement is the SAIJ125X165-50S. It shares the same ISO 15552 interface, 125 mm bore, 165 mm stroke, 50 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 allows you to trim the extend stroke by up to 50 mm on-site, giving a usable range of 115-165 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X165-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X165-50S replacement — usually within 7-8 hours.