This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X105, 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 SI50X105
The AirTAC Airtac SI50 Standard Cylinder SI50X105 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 105mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X105, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X105
- 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 SI50X105
The AirTAC SI50X105 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 105mm stroke, delivering 982N push force at 0.5MPa via a G1/4 port. As an end-of-life unit, it is replaced by the SAI50X105 direct equivalent, which maintains identical interface dimensions, output force, and mounting accessories.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet and cannot accept position sensors.
Airtac SI50 Standard Cylinder SI50X105 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X105 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X105 |
| Bore size | Ø50 mm |
| Stroke | 105 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 SAI50X105 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 SAI50X105 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 SI50X105
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×105 | 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 SI50X105 Is Used
Package Diversion
Actuates routing gates on packaging lines using its 982N thrust to positively deflect cartons at high cycling speeds.
Clamp Actuation
Provides reliable clamping force for mid-weight machining fixtures, utilizing the 30mm adjustable cushion to prevent end-impact.
Replacing the Airtac SI50 Standard Cylinder SI50X105 with the SAI50X105
To replace the SI50X105, order the SAI50X105. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 105mm stroke, and the G1/4 port thread (PT, G, or NPT). Because this non-magnetic SKU cannot host a CS1-B or DS1-B switch, you must add the -S magnet suffix if position sensing is required. If you need to scale, the neighbouring 40mm bore yields 628N push at 0.5MPa, while the 63mm bore provides 1559N. For stroke lengths of 105mm, side-load risks are minimal, but always ensure rigid guidance. Remember that standard cylinders drift on air loss; for load holding, specify the SAIL lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X105
- ✓ 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 SI50X105 FAQ
Yes, the SI50X105 is discontinued. The direct replacement is the SAI50X105. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 105mm stroke, G1/4 port, and mounting footprint. You simply order the SAI equivalent for your existing fixtures.
This double-acting cylinder uses a G1/4 air port. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and 1767N push at 0.9MPa. The theoretical maximum force is 200kgf at 1.0MPa.
Request a Quote for the SAI50X105
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X105 replacement — usually within 7-8 hours.