This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X125-100STC, 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X125-100STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X125-100STC
- 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC
The AirTAC SIJ80X125-100STC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 100mm on-site, giving a usable 25-125mm window from the 125mm nominal maximum. The direct replacement is the SAIJ80X125-100STC, matching the interface, force, and TC mounting.
The SAIJ successor retains the ISO 15552 dimensions but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X125-100STC |
| Bore size | Ø80 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ80X125-100STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAIJ80X125-100STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC Is Used
Variable Stroke Clamping
Ideal for clamping stations where the external stop screw trims the extend stroke by up to 100mm on-site to accommodate varying part thicknesses without repositioning the cylinder.
Adjustable Transfer Stops
Provides a field-tuned end position for diverter gates on a conveyor, allowing operators to shorten the 125mm stroke to meet specific package dimensions precisely.
Custom Ejection Pushers
Used in ejection systems where the usable 25-125mm extend window lets maintenance teams dial in the exact push distance required for different product runs.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC with the SAIJ80X125-100STC
To replace the discontinued SIJ80X125-100STC, map directly to the SAIJ80X125-100STC direct, keeping the 80mm bore, 125mm stroke, 100mm adjust window, -S magnet, and TC mount. Choose the 100mm adjust window if your field tuning requires trimming the extend stroke by up to 100mm on-site. The TC mounting accessory provides a trunnion interface for pivot applications. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For strokes of 300mm or longer, verify side-load limits to prevent rod bearing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X125-100STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X125-100STC FAQ
Yes, the SIJ80X125-100STC is discontinued. The direct replacement is the SAIJ80X125-100STC, which shares the identical ISO 15552 interface, 80mm bore, 125mm nominal stroke, 100mm adjust window, G3/8 port, and TC mounting. The SAIJ upgrade features an improved two Y-shaped one-way piston seal for longer life.
The external stop screw window is 100mm, meaning you can trim the extend stroke on-site from the 125mm maximum down to 25mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X125-100STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X125-100STC replacement — usually within 7-8 hours.