This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X500-100, 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 SIJ125X500-100
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X500-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X500-100
- 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 SIJ125X500-100
The AirTAC SIJ125X500-100 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 500 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 100 mm on-site, giving a usable 400-500 mm window. The direct replacement is the SAIJ125X500-100, retaining the same interface, force, and adjustability.
The SAIJ successor incorporates an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this non-magnetic SKU cannot accept a switch, and the external stop sets position only—it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X500-100 |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-100 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 SAIJ125X500-100 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 SIJ125X500-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SIJ125X500-100 Is Used
Press Fit Tuning
Allows on-site extend stroke adjustment up to 100 mm to dial in exact press-fit depths for varying assembly heights without changing cylinders.
Variable Format Sealing
Adjusts the extend endpoint within the 400-500 mm window to accommodate different carton sizes on a packaging line.
Adjustable Stops
Sets precise mechanical end positions for diverter arms, permitting quick 100 mm repositioning as pallet dimensions change.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-100 with the SAIJ125X500-100
To replace the discontinued SIJ125X500-100, order the direct replacement SAIJ125X500-100, matching the 125 mm bore, 500 mm max stroke, 100 mm adjust window, and G1/2 port. Mounting interfaces (Basic, FA, LB, TC) interchange directly via ISO 15552 dimensions. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. At 500 mm stroke, prevent rod bending by using external guides to manage side loads. Remember the stop screw trims extend position but does not hold loads on air loss—use SAIL or BSAI lock variants for that.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X500-100
- ✓ 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 SIJ125X500-100 FAQ
Yes, the SIJ125X500-100 is discontinued. The direct replacement is the SAIJ125X500-100, which shares the identical ISO 15552 interface, 125 mm bore, 500 mm max stroke, 100 mm adjust window, and G1/2 port. The SAIJ family also upgrades the piston seal to a two-piece Y-shaped design for longer life.
The external stop screw shortens the extend stroke by up to 100 mm on-site, yielding a 400-500 mm usable window. 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 SAIJ125X500-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X500-100 replacement — usually within 7-8 hours.