This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X250TC, 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 SI80 Standard Air Cylinder SI80X250TC
The AirTAC SI80 Standard Air Cylinder SI80X250TC 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 SAI80X250TC, 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 → SAI80X250TC
- 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 SI80 Standard Air Cylinder SI80X250TC
The AirTAC SI80X250TC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 250 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa. The direct replacement is the SAI80X250TC, retaining the same G3/8 port, M20x1.5 rod thread, TC trunnion mount and ISO 15552 interface. This SKU lacks the -S magnet, so it cannot accept a CS1-B/DS1-B sensor.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants absent from the SI line.
Airtac SI80 Standard Air Cylinder SI80X250TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X250TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X250TC |
| 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 SAI80X250TC 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 SAI80X250TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X250TC
| 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 SI80 Standard Air Cylinder SI80X250TC Is Used
Pallet Diverting
Uses the TC trunnion mount to pivot and push heavy pallets off a transfer line, utilizing the 2513 N push force at 0.5 MPa.
Press Ejection
Ejects formed metal components from a stamping die, taking advantage of the 36 mm adjustable air cushions to decelerate at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X250TC with the SAI80X250TC
To replace the SI80X250TC, order the SAI80X250TC. Verify the ISO 15552 TC trunnion mounting, 80 mm bore, 250 mm stroke, G3/8 port (PT/G/NPT thread) and non-magnet state. Because this stroke is 250 mm, ensure adequate guide support to prevent rod bending under side loads. If sizing up or down, neighboring bores are 63 mm (2182 N push @0.7) and 100 mm (5497 N push @0.7). A plain cylinder drifts on air loss; the 36 mm air cushion only decelerates. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X250TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X250TC FAQ
Yes, the SI80X250TC is discontinued. The direct replacement is the SAI80X250TC. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 250 mm stroke, G3/8 port, TC mount and output force.
The bore is 80 mm with a G3/8 port. It pushes 2513 N and pulls 2268 N at 0.5 MPa, pushes 3518 N at 0.7 MPa, and reaches a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X250TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X250TC replacement — usually within 7-8 hours.