This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X250-50TC, 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X250-50TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X250-50TC
- 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC
The AirTAC SIJ80X250-50TC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 250 mm nominal stroke and a TC mounting interface. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 200-250 mm end position. This 80 mm bore uses a G3/8 port, a Ø25 mm rod, and 36 mm adjustable cushions. Because this SKU lacks a -S suffix, it has no magnet and cannot accept a reed switch. The direct replacement is the SAIJ80X250-50TC, matching the bore, force, adjust window, and TC mount.
The SAIJ upgrade retains these ratings but uses an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Remember the external stop sets end position only; it is not a load lock, so use an external rod lock or SAIL variant to hold loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-50TC |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80X250-50TC 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 SAIJ80X250-50TC 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 SIJ80X250-50TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SIJ80X250-50TC Is Used
Variable Pitch Indexing
Dialing the extend stroke on-site by up to 50 mm allows a single cylinder to drive multiple varying pitches without swapping the entire ISO 15552 assembly.
Adjustable Transfer Pusher
Trimming the extend stroke from 250 mm down to 200 mm accommodates changing package sizes on a TC-mounted transfer line without repositioning hardware.
Variable Depth Sealing
Fine-tuning the end position by up to 50 mm provides precise depth control for sealing heads handling different carton heights.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC with the SAIJ80X250-50TC
To replace the discontinued SIJ80X250-50TC, order the exact direct replacement SAIJ80X250-50TC to reuse your existing ISO 15552 TC mounting and G3/8 porting. Choose the 50 mm adjust window if your extend stroke needs on-site tuning between 200 and 250 mm; if a fixed 250 mm end position is acceptable, a standard SAI cylinder is simpler. The TC mount is retained across the family. This non-magnetic SKU cannot support sensing; add the -S suffix on SAIJ for legacy CS1-B/DS1-B switch accuracy. For strokes at or above 300 mm, verify side-load limits to prevent guide wear. The stop screw sets end position but does not lock; for load-holding on air loss, specify a SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-50TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50TC FAQ
Yes, the SIJ80X250-50TC is discontinued. The direct replacement is the SAIJ80X250-50TC, offering the same 80 mm bore, 250 mm stroke, 50 mm adjust window, G3/8 port, and TC mounting interface.
The external stop screw window is 50 mm, allowing you to trim the 250 mm extend stroke down to 200 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X250-50TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X250-50TC replacement — usually within 7-8 hours.