This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X200H, 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 SI50X200H
The AirTAC Airtac SI50 Standard Cylinder SI50X200H 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 SAI50X200H, 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 → SAI50X200H
- 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 SI50X200H
The AirTAC SI50X200H is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 200 mm stroke. Featuring a high-temperature Viton H seal (0-150 C) and a G1/4 port, it delivers 982 N push force at 0.5 MPa. This SKU lacks a magnet and cannot accept a sensor. The direct replacement is the SAI50X200H, sharing identical ISO 15552 mounting dimensions, output, and porting.
The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50X200H Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X200H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X200H |
| 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 SAI50X200H 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 SAI50X200H 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 SI50X200H
| 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 SI50X200H Is Used
High-Temperature Forming
Ideal for clamping parts in hot environments up to 150 C using the Viton H seal, providing 982 N of reliable clamping force at 0.5 MPa.
Pneumatic Diverter Gates
Powers diverter arms and sorting gates on packaging lines, utilizing the adjustable 30 mm air cushions to soften end-of-stroke impacts.
Replacing the Airtac SI50 Standard Cylinder SI50X200H with the SAI50X200H
To replace this SI50X200H, order the SAI50X200H. Verify the ISO 15552 interface, 50 mm bore, 200 mm stroke, G1/4 port, and Viton H high-temperature seal (0-150 C). Because this specific SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors; if position detection is needed, select a magnet-equipped SAI. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while a neighbouring 63 mm bore offers 1559 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 200 mm stroke, rod-bending side loads are minimal, but always guide the load to prevent rod damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X200H
- ✓ 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 SI50X200H FAQ
Yes, the SI50X200H is discontinued. The direct replacement is the SAI50X200H. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 200 mm stroke, G1/4 port, and mounting interface.
It features a G1/4 port and delivers a push force of 982 N and pull force of 825 N at 0.5 MPa. At 0.7 MPa push is 1374 N, and 1767 N at 0.9 MPa. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X200H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X200H replacement — usually within 7-8 hours.