This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-20S, 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 SIJ125X80-20S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20S 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 SAIJ125X80-20S, 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 → SAIJ125X80-20S
- 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 SIJ125X80-20S
The AirTAC SIJ125X80-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 60-80 mm extension from the 80 mm nominal maximum. The direct replacement is the SAIJ125X80-20S, matching the interface, bore, force, and mounting.
Upgrading to the SAIJ family retains the ISO 15552 mounting dimensions but introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; for held loads, use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-20S |
| 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 SAIJ125X80-20S 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 SAIJ125X80-20S 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 SIJ125X80-20S
| 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 SIJ125X80-20S Is Used
Press Fit Tuning
Allows operators to dial in the exact 60-80 mm extend position for pressing bearings without machining hard stops.
Divertor Gate Adjustment
Provides on-site stroke trimming to fine-tune the actuation angle of a heavy package divertor gate.
Pallet Stop Positioning
Enables field adjustment of the extend stop to accommodate varying pallet lengths on a handling line.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20S with the SAIJ125X80-20S
To replace the discontinued SIJ125X80-20S, order the SAIJ125X80-20S direct, which preserves the G1/2 port, M27x2 thread, and 40 mm cushions. Choose the 20 mm adjust window if your end-position tuning requires trimming the 80 mm extend stroke down to a 60 mm minimum. Mounting options include Basic, FA, LB, and TC brackets. The -S suffix indicates a built-in piston magnet for 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 → SAIJ125X80-20S
- ✓ 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 SIJ125X80-20S FAQ
Yes, the SIJ125X80-20S is discontinued. The direct replacement is the SAIJ125X80-20S, offering the same ISO 15552 interface, 125 mm bore, 80 mm stroke, 20 mm adjust window, and G1/2 port.
The external stop screw provides a 20 mm adjust window, shortening the 80 mm extend stroke down to 60 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-20S replacement — usually within 7-8 hours.