This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1200TC, 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 SI50 Standard Cylinder SI50X1200TC
The AirTAC SI50 Standard Cylinder SI50X1200TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1200TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1200TC
- 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 SI50 Standard Cylinder SI50X1200TC
The AirTAC SI50X1200TC is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore, 1200 mm stroke and TC trunnion mounting. It delivers 982 N push force at 0.5 MPa via a G1/4 port. As an end-of-line unit, it is replaced directly by the SAI50X1200TC.
The SAI50X1200TC direct replacement retains identical ISO 15552 mounting dimensions, bore, stroke and force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Since this specific SKU lacks a magnet (-S), it cannot accept position switches. For load holding, note that standard cylinders drift without live air; use an external pilot check valve or the SAIL lock variant.
Airtac SI50 Standard Cylinder SI50X1200TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1200TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1200TC |
| Bore size | Ø50 mm |
| Stroke | 1200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X1200TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X1200TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X1200TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1200 | 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 SI50 Standard Cylinder SI50X1200TC Is Used
Long-Stroke Material Transfer
Pushes workpieces between processing stations over a 1200 mm span, utilizing the 982 N thrust at 0.5 MPa to move moderate loads along an external guide rail.
Extended Reach Ejection
Ejects finished parts from deep machinery beds, relying on the TC trunnion mount to accommodate the angular deflection inherent to 1200 mm strokes.
Replacing the Airtac SI50 Standard Cylinder SI50X1200TC with the SAI50X1200TC
To replace the SI50X1200TC, order the SAI50X1200TC to get the exact 50 mm bore, 1200 mm stroke, G1/4 port and TC trunnion mount. Verify your side-load constraints: at 1200 mm, rod bending is a high risk, so use an external guide to prevent premature seal failure. If you need more force, the neighbouring 63 mm bore offers 1559 N at 0.5 MPa. Because this is a no-S SKU, it cannot take CS1-B/DS1-B sensors. If the application requires holding a load on air loss, switch to the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1200TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X1200TC FAQ
Yes, the SI50X1200TC is discontinued. The direct replacement is the SAI50X1200TC. It is dimensionally interchangeable per ISO 15552, matching the 50 mm bore, 1200 mm stroke, G1/4 port, TC mounting and output force so it fits existing fixtures directly.
This double-acting cylinder uses a G1/4 air port and features a 20 mm rod with M16x1.5 thread. Force output is 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1200TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1200TC replacement — usually within 7-8 hours.