This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X300-100, 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 SIJ125X300-100
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X300-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 300mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X300-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X300-100
- 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 SIJ125X300-100
The AirTAC SIJ125X300-100 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 100mm on-site, giving a usable 200-300mm extension. The direct replacement is the SAIJ125X300-100, sharing the G1/2 port, M27x2 rod thread, and 40mm cushions.
The SAIJ upgrade features a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) for switches. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X300-100 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X300-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X300-100 |
| Bore size | Ø125 mm |
| Stroke | 300 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 SAIJ125X300-100 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 SAIJ125X300-100 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 SIJ125X300-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SIJ125X300-100 Is Used
Press Fit Tuning
Allows operators to dial in the exact 200-300mm extend position for pressing bearings without machining custom spacers.
Variable Diverter Stroke
Adjusts the extend length on-site to accommodate different package widths on a sorting line.
Adjustable End Stops
Provides a field-tunable end position for pallet handling where the required reach varies by pallet type.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X300-100 with the SAIJ125X300-100
To replace the discontinued SIJ125X300-100, order the direct replacement SAIJ125X300-100, reusing your ISO 15552 FA, LB, or TC mounts. This 125mm bore provides 8590N @0.7MPa. Choose the 100mm adjust window if you need to trim the 300mm nominal stroke down to 200mm on-site. Because this SKU has no -S suffix, it cannot accept a magnetic switch. For the 300mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X300-100
- ✓ 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 SIJ125X300-100 FAQ
Yes, the SIJ125X300-100 is discontinued. The direct replacement is the SAIJ125X300-100. It shares the same ISO 15552 interface, 125mm bore, 300mm stroke, 100mm adjust window, G1/2 port, and mounting options. The SAIJ family also uses an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw window is 100mm, allowing you to trim the 300mm nominal extend stroke down to 200mm on-site. The stop sets end position but is not a load lock. Speed is 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X300-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X300-100 replacement — usually within 7-8 hours.