This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X1550-50, 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X1550-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X1550-50
- 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50
The AirTAC SIJ80X1550-50 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 1550 mm nominal stroke and a 50 mm external stop screw window, letting you trim the extend stroke on-site down to 1500 mm. Because 1550 mm exceeds the 1500 mm standard maximum for this bore, this unit is a non-standard made-to-order configuration. It features a 25 mm rod, M20x1.5 rod-end thread, G3/8 port, and 36 mm adjustable air cushions at each end. This SIJ model is discontinued; the direct replacement is the SAIJ80X1550-50, matching the bore, stroke, adjust window, port, and mounting interface.
The SAIJ upgrade introduces an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note: this SKU lacks a -S magnet and cannot accept a sensor. The external stop 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 SIJ80X1550-50 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X1550-50 |
| Bore size | Ø80 mm |
| Stroke | 1550 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 SAIJ80X1550-50 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 SAIJ80X1550-50 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 SIJ80X1550-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1550 | 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 SIJ80X1550-50 Is Used
Long-Transfer Diverter
Tunes the extend reach on a 1550 mm diverter arm to match varying pallet widths without swapping the cylinder.
Adjustable-Height Lift Gate
Trims the extend stroke by up to 50 mm to dial in exact stopping heights for different dock elevations.
Indexing Pusher Station
Allows on-site stroke adjustment for a long-travel pusher that feeds parts of varying lengths into a machining center.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50 with the SAIJ80X1550-50
To replace the discontinued SIJ80X1550-50, order the direct replacement SAIJ80X1550-50, reusing your existing ISO 15552 FA, LB, or TC mounting hardware. The 50 mm adjust window allows you to tune the extend stroke from 1550 mm down to 1500 mm on-site. Because the 1550 mm stroke is non-standard and exceeds the 1500 mm maximum, pay close attention to side-load and rod-bending risks—external guides are strongly recommended for this length. This non-magnetic SKU cannot accept legacy CS1-B/DS1-B sensors. Remember that the stop screw only sets the end position and does not lock the load; for load-holding without live air, specify a SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X1550-50
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X1550-50 FAQ
Yes, the SIJ80X1550-50 is discontinued. The direct replacement is the SAIJ80X1550-50, which matches the ISO 15552 interface, 80 mm bore, 1550 mm stroke, 50 mm adjust window, G3/8 port, and mounting options. The SAIJ family also adds an upgraded piston seal for longer life.
The external stop screw window is 50 mm, allowing you to shorten the 1550 mm nominal extend stroke down to 1500 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X1550-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X1550-50 replacement — usually within 7-8 hours.