This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X600H, 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 SI50X600H
The AirTAC Airtac SI50 Standard Cylinder SI50X600H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X600H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X600H
- 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 SI50X600H
The AirTAC SI50X600H is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 600mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X600H, which maintains the exact ISO 15552 mounting interface, bore, stroke, and output force. This SKU lacks a magnet and cannot accept a sensor. The -H designation indicates a Viton H seal, extending the operating temperature range from -20°C up to 150°C.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Because this is a 600mm stroke, external guides are recommended to prevent rod bending. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For held loads, use an external pilot check valve or the SAIL lock variant.
Airtac SI50 Standard Cylinder SI50X600H Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X600H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X600H |
| Bore size | Ø50 mm |
| Stroke | 600 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 SAI50X600H 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 SAI50X600H 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 SI50X600H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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 SI50X600H Is Used
Long-Stroke Diversion
Ideal for pushing packages across a 600mm lane on high-temperature conveyor lines, utilizing the 982N force and Viton H seals up to 150°C.
High-Temperature Forming
Actuates heavy doors or platens near heat sources where standard NBR seals would fail, taking advantage of the -H Viton H temperature rating.
Replacing the Airtac SI50 Standard Cylinder SI50X600H with the SAI50X600H
To replace the discontinued SI50X600H, order the SAI50X600H. Confirm the ISO 15552 mounting interface, the 50mm bore, the 600mm stroke, the G1/4 port, and your specific mounting accessory (LB, FA, TC, etc.). This non-magnetic SKU cannot support position sensing. If your application requires holding the load without live air, do not rely on the air cushions—upgrade to the SAIL air-released lock or BSAI clamp-lock variant, or install an external pilot check valve. For a 600mm stroke, use external guides to prevent rod bending and side-load damage. If sizing up or down, neighbouring bores are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X600H
- ✓ 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 SI50X600H FAQ
Yes, the SI50X600H is discontinued. The direct replacement is the SAI50X600H. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 600mm stroke, 982N force, G1/4 port, and mounting interface. You simply order the SAI equivalent.
This double-acting cylinder has a 50mm bore, 20mm rod, M16x1.5 thread, G1/4 port, and 30mm adjustable cushions. The thrust is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical maximum of 200kgf at 1.0MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X600H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X600H replacement — usually within 7-8 hours.