This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-50TC, 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 SIJ125X80-50TC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50TC 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 SAIJ125X80-50TC, 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 → SAIJ125X80-50TC
- 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 SIJ125X80-50TC
The AirTAC SIJ125X80-50TC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a TC mount interface. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 30-80 mm extend window from the 80 mm nominal maximum. It features a G1/2 port, M27x2 rod thread, and 40 mm adjustable air cushions. The direct replacement is the SAIJ125X80-50TC, matching the bore, stroke, force, adjust window, port, and mounting.
The SAIJ successor retains the exact ISO 15552 mounting dimensions so existing TC brackets bolt straight on, and it upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this SKU lacks the -S magnet and cannot accept a sensor; for load-holding on air loss, use an external rod lock or the SAIL/BSAI variants, as the stop screw only sets end position and is not a lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50TC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-50TC |
| 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 SAIJ125X80-50TC 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 SAIJ125X80-50TC 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 SIJ125X80-50TC
| 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 SIJ125X80-50TC Is Used
Press Fit Tuning
Allows operators to dial in the exact 30-80 mm extend position on-site for pressing bearings without machining custom spacers.
Variable Diverter Gate
Adjusts the extend stroke up to 50 mm to reposition a diverter flap for different package sizes on a packaging line.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-50TC with the SAIJ125X80-50TC
To replace the discontinued SIJ125X80-50TC, order the direct replacement SAIJ125X80-50TC, which preserves the ISO 15552 interface, TC mount, G1/2 port, and 50 mm adjust window. Choose the 50 mm adjust window if your end-position needs field tuning across a 30-80 mm extend range. Mount via the included TC clevis, or swap to FA/LB styles using standard ISO 15552 accessories. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add the -S option if sensing is required. For strokes of 300 mm or longer, carefully manage side-load forces to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-50TC
- ✓ 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 SIJ125X80-50TC FAQ
Yes, the SIJ125X80-50TC is discontinued. The direct replacement is the SAIJ125X80-50TC. It shares the same ISO 15552 interface, 125 mm bore, 80 mm stroke, 50 mm adjust window, G1/2 port, and TC mounting, but features an upgraded piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 50 mm on-site, giving a usable extend range of 30-80 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-50TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-50TC replacement — usually within 7-8 hours.