This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-50, 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 SIJ125X80-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 80mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X80-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X80-50
- 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 SIJ125X80-50
The AirTAC SIJ125X80-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125mm bore and 80mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a usable 30-80mm window. The direct replacement is the SAIJ125X80-50, matching the bore, force, port, and mounting interface.
The SAIJ successor retains the ISO 15552 mounting interface for direct hardware reuse and upgrades to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. This plain non-magnet SKU cannot accept a position switch. The stop screw sets the end position but is not a lock; cylinders drift on air loss, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-50 |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-50 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 SAIJ125X80-50 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 SIJ125X80-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SIJ125X80-50 Is Used
Press Fit Tuning
Pin and bearing insertion tasks needing field stroke tuning to dial in exact 30-80mm extend positions without re-machining hard stops.
Variable Depth Carton Sealing
Packing lines handling fluctuating box heights where the external stop screw trims the extend stroke on-site to prevent crushing.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50 with the SAIJ125X80-50
To replace the discontinued SIJ125X80-50, order the direct replacement SAIJ125X80-50, which preserves the 80mm nominal stroke, 50mm adjust window, G1/2 port, and FA/LB/TC mountings. Choose the 50mm adjust window if your fixture needs field stroke tuning between 30-80mm. Because this SKU lacks the -S magnet, it cannot take legacy CS1-B/DS1-B sensors; add external physical stops or switch to a sensed variant if detection is required. For strokes at or above 300mm, carefully manage side loads to prevent rod binding, and never rely on the adjustable stop or air cushions to hold a load on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-50
- ✓ 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 SIJ125X80-50 FAQ
Yes, the SIJ125X80-50 is discontinued. The direct replacement is the SAIJ125X80-50, which shares the identical ISO 15552 interface, 125mm bore, 80mm stroke, 50mm adjust window, G1/2 port, and mounting options. The SAIJ family also upgrades to a two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 50mm adjustment window, allowing the 80mm extend stroke to be shortened to a 30mm minimum on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-50 replacement — usually within 7-8 hours.