This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X200TC, 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 SI50X200TC
The AirTAC SI50 Standard Cylinder SI50X200TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X200TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X200TC
- 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 SI50X200TC
The AirTAC SI50X200TC is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 200 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI50X200TC, sharing the exact TC trunnion mount, M16x1.5 rod thread, and 30 mm cushions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. This no-magnet SKU cannot hold a sensor; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI50 Standard Cylinder SI50X200TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X200TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X200TC |
| Bore size | Ø50 mm |
| Stroke | 200 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 SAI50X200TC 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 SAI50X200TC 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 SI50X200TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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 SI50X200TC Is Used
Package Diverting
Uses the TC trunnion mount to pivot and divert medium-weight packages along a sorting line with 982 N of push force.
Clamp Actuation
Provides reliable 50 kg vertical clamping force for machining fixtures, utilizing the 200 mm stroke to clear the workpiece.
Pallet Lift Gate
Raises and lowers access gates on pallet conveyors, benefiting from the 30 mm adjustable cushions to soften end-of-stroke impacts.
Replacing the Airtac SI50 Standard Cylinder SI50X200TC with the SAI50X200TC
To replace the SI50X200TC, order the SAI50X200TC. Confirm the ISO 15552 TC trunnion interface, 50 mm bore, 200 mm stroke, G1/4 port, and M16x1.5 rod thread. This non-magnetic SKU cannot accept a CS1-B or DS1-B switch. Sizing both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 40 mm bore yields 628 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For secure holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X200TC
- ✓ 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 SI50X200TC FAQ
Yes, the SI50X200TC is discontinued. The direct replacement is the SAI50X200TC. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 200 mm stroke, G1/4 port, TC trunnion mount, and output force.
It features a G1/4 air port and M16x1.5 rod 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, with a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X200TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X200TC replacement — usually within 7-8 hours.