This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X32, 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 SI50X32
The AirTAC Airtac SI50 Standard Cylinder SI50X32 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 32mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X32, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke32 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X32
- 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 SI50X32
The AirTAC SI50X32 is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 32 mm stroke, delivering a push force of 982 N at 0.5 MPa. It features a G1/4 air port, an M16x1.5 rod thread, and 30 mm adjustable air cushions at both ends. As this legacy unit is end-of-life, AirTAC mandates the SAI50X32 as the direct replacement. The SAI upgrade retains the same ISO 15552 mounting interface, bore, stroke, force, and port, fitting existing fixtures perfectly.
The SAI family introduces an upgraded piston seal utilizing two Y-shaped one-way elements for longer life and lower start-up pressure. For applications needing load holding on air loss, the SAI line adds the SAIL air-released lock and BSAI clamp-lock variants the SI lacked. Note this specific SKU lacks a magnet, so it cannot accept a CS1-B or DS1-B sensor.
Airtac SI50 Standard Cylinder SI50X32 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X32 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X32 |
| Bore size | Ø50 mm |
| Stroke | 32 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 SAI50X32 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 SAI50X32 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 SI50X32
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×32 | 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 SI50X32 Is Used
Short-Stroke Clamping
Ideal for holding workpieces in CNC machining fixtures, utilizing the 982 N push force across a precise 32 mm travel distance.
Package Diverting
Provides reliable actuation for sorting lanes in material handling lines, moving lightweight goods with rapid 30-800 mm/s speeds.
Component Ejection
Delivers quick ejection of molded parts from automated machinery, benefiting from the 30 mm adjustable air cushions at stroke ends.
Replacing the Airtac SI50 Standard Cylinder SI50X32 with the SAI50X32
To replace the discontinued SI50X32, order the SAI50X32 direct, verifying the ISO 15552 mounting interface, 50 mm bore, 32 mm stroke, G1/4 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, TC, etc.). This non-magnet SKU cannot take a sensor; if position detection is needed, select an SAI50X32S. Sizing both ways: the 50 mm bore yields 982 N push at 0.5 MPa, while the neighboring 40 mm bore offers 628 N and the 63 mm bore provides 1559 N. A plain cylinder drifts on air loss since cushions only decelerate; for held loads, use the SAIL lock variant or an external pilot check valve. The SAIF variant with a built-in 4M valve is also available for bores up to 100 mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X32
- ✓ 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 SI50X32 FAQ
Yes, the AirTAC SI50X32 is discontinued. The direct replacement is the SAI50X32. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 32 mm stroke, output force, G1/4 port, and mounting interface to fit existing fixtures.
This double-acting cylinder features a G1/4 air port and an M16x1.5 rod thread. It delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum force of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X32
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X32 replacement — usually within 7-8 hours.