This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-20TC, 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 SIJ125X80-20TC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20TC 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 SAIJ125X80-20TC, 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 → SAIJ125X80-20TC
- 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 SIJ125X80-20TC
The AirTAC SIJ125X80-20TC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the 80mm extend stroke by up to 20mm on-site, yielding a 60-80mm usable window. It features a G1/2 port, M27x2 rod thread, and 40mm adjustable cushions. The direct replacement is the SAIJ125X80-20TC, sharing the same interface, TC mount, and force.
The SAIJ upgrade utilizes an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot take a switch. The stop screw sets end position only; it is not a load lock. For held loads use SAIL or BSAI.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20TC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-20TC |
| 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 SAIJ125X80-20TC 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 SAIJ125X80-20TC 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 SIJ125X80-20TC
| 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 SIJ125X80-20TC Is Used
Press Fit Tuning
Allows operators to dial in the exact 60-80mm extend position for pressing bearings without machining hard stops.
Variable Carton Forming
Adjusts the extend end position on-site to accommodate different package depths in packaging lines.
End-of-Stroke Dampening
Sets a precise mechanical stop for heavy 125mm bore loads where fixed external bumpers are impractical.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-20TC with the SAIJ125X80-20TC
To replace the discontinued SIJ125X80-20TC, specify SAIJ125X80-20TC for an direct match retaining the TC mount and 20mm adjust window. Choose the 20mm adjust window if your extend stroke needs on-site tuning between 60-80mm. The TC mounting interface allows ISO 15552 interchangeability via mounting dimensions. Because this SKU lacks a -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes >=300mm, verify side-load tolerance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-20TC
- ✓ 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 SIJ125X80-20TC FAQ
Yes, the SIJ125X80-20TC is discontinued. The direct replacement is the SAIJ125X80-20TC. It shares the same ISO 15552 interface, 125mm bore, 80mm stroke, 20mm adjust window, G1/2 port, and TC mount. The SAIJ family also adds an upgraded piston seal for longer life.
At 0.7MPa push is 8590N, and at 0.9MPa it is 11045N. The theoretical max is 1251kgf at 1.0MPa. The 20mm adjust window allows trimming the 80mm extend stroke down to 60mm on-site. The stop sets end position only and is not a load lock; for held loads use SAIL or BSAI.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-20TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-20TC replacement — usually within 7-8 hours.