This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X190S, 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 SI50X190S
The AirTAC Airtac SI50 Standard Cylinder SI50X190S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 190mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X190S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X190S
- 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 SI50X190S
The AirTAC SI50X190S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 190mm stroke. It delivers 982N push and 825N pull at 0.5MPa through a G1/4 port. The direct replacement is the SAI50X190S, matching the bore, stroke, force, port and mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI-S magnet supports CS1-B/DS1-B switches, while SAI adds SAIL, SAIF and BSAI variants.
Airtac SI50 Standard Cylinder SI50X190S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X190S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X190S |
| Bore size | Ø50 mm |
| Stroke | 190 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 SAI50X190S 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 SAI50X190S 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 SI50X190S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×190 | 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 SI50X190S Is Used
Package Diversion
Ideal for pushing 50kg cartons off a packaging line using the 982N push force at 0.5MPa with a 190mm stroke.
Clamp Actuation
Provides reliable holding pressure for mid-sized workpiece fixtures, utilising the 825N pull force at 0.5MPa.
Pallet Stops
Functions as a pneumatic stop gate for inbound pallets, benefiting from the 30mm adjustable air cushion at each end.
Replacing the Airtac SI50 Standard Cylinder SI50X190S with the SAI50X190S
To replace the SI50X190S, order the SAI50X190S to get the exact ISO 15552 mounting interface, 190mm stroke, M16x1.5 rod thread and G1/4 port. Confirm your mounting accessory (LB, FA, TC) and the magnet (-S). If sizing up or down, the 40mm bore yields 628N push while the 63mm bore yields 1559N at 0.5MPa. The 190mm stroke is under the 1200mm max standard, so no side-load guide is strictly required, but always prevent rod bending. A plain cylinder drifts on air loss; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. Rod options include carbon steel, SUS420J2 (A) or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X190S
- ✓ 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 SI50X190S FAQ
Yes, the SI50X190S is discontinued. The direct replacement is the SAI50X190S. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 190mm stroke, output force, G1/4 port and mounting accessories.
This double-acting cylinder has a G1/4 port and M16x1.5 rod thread. It delivers 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X190S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X190S replacement — usually within 7-8 hours.