This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X885S, 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 SI50X885S
The AirTAC Airtac SI50 Standard Cylinder SI50X885S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 885mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X885S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke885 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X885S
- 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 SI50X885S
The AirTAC SI50X885S is a discontinued double-acting ISO 15552 profile cylinder with an 885 mm stroke, delivering a push force of 982 N at 0.5 MPa. It features a Ø20 mm rod, M16x1.5 thread, and a G1/4 air port. AirTAC replaced this legacy unit with the SAI50X885S, a direct upgrade retaining the exact same ISO 15552 mounting interface, bore, stroke, and port size.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SI50X885S variant includes a magnet for CS1-B/DS1-B sensors, and the SAI family expands capabilities with SAIL, SAIF, and BSAI lock variants.
Airtac SI50 Standard Cylinder SI50X885S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X885S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X885S |
| Bore size | Ø50 mm |
| Stroke | 885 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 SAI50X885S 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 SAI50X885S 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 SI50X885S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×885 | 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 SI50X885S Is Used
Long-Stroke Diversion
Drives large packages across wide conveyor belts using the full 885 mm travel distance.
Vertical Material Lift
Hoists components up to 50 kg in storage racks, relying on the 982 N push force at 0.5 MPa.
Automated Assembly Transfer
Shifts heavy pallets between workstations, utilizing the G1/4 port and ISO 15552 fixtures.
Replacing the Airtac SI50 Standard Cylinder SI50X885S with the SAI50X885S
To replace the discontinued SI50X885S, order the SAI50X885S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/4 port, and the -S magnet requirement. Because this is an 885 mm stroke, prevent rod bending by using external guides to manage side loads. If you need more force, the adjacent 63 mm bore provides 1559 N at 0.5 MPa; if less is needed, the 40 mm bore offers 628 N. Note that a standard cylinder drifts without live air; for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X885S
- ✓ 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 SI50X885S FAQ
Yes, the SI50X885S is discontinued. The direct replacement is the SAI50X885S. It is dimensionally interchangeable per ISO 15552, matching the 50 mm bore, 885 mm stroke, G1/4 port, and output force for a seamless fixture swap.
This double-acting cylinder operates at 30-800 mm/s. It delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa. At 0.7 MPa the push is 1374 N, and at 0.9 MPa it is 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X885S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X885S replacement — usually within 7-8 hours.