This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X175TC, 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 SI50X175TC
The AirTAC SI50 Standard Cylinder SI50X175TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 175mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X175TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X175TC
- 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 SI50X175TC
The AirTAC SI50X175TC is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 175 mm stroke. It delivers a push force of 982 N at 0.5 MPa via a G1/4 port. The direct replacement is the SAI50X175TC, which shares the exact TC trunnion mounting, M16x1.5 rod thread, and output force.
This SKU lacks a magnet (-S), so it cannot accept legacy CS1-B/DS1-B sensors. The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life.
Airtac SI50 Standard Cylinder SI50X175TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X175TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X175TC |
| Bore size | Ø50 mm |
| Stroke | 175 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 SAI50X175TC 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 SAI50X175TC 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 SI50X175TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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 SI50X175TC Is Used
Package Diversion
Actuates routing gates on packaging lines using the 982 N push force to deflect cartons reliably at 0.5 MPa.
Clamp Actuation
Secures workpieces in machining fixtures via the TC trunnion mount, accommodating misalignment during the 175 mm stroke.
Replacing the Airtac SI50 Standard Cylinder SI50X175TC with the SAI50X175TC
To replace the SI50X175TC, order the SAI50X175TC. Verify the ISO 15552 TC trunnion mount, 50 mm bore, 175 mm stroke, G1/4 port, and M16x1.5 rod thread. Because this SKU has no magnet, it cannot support position sensing; order an SAI with the S suffix if you need current AirTAC switches. For sizing alternatives, a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore provides 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. Since the stroke is under 300 mm, rod-bending side loads are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X175TC
- ✓ 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 SI50X175TC FAQ
Yes, the AirTAC SI50X175TC is discontinued. The direct replacement is the SAI50X175TC. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 175 mm stroke, G1/4 port, TC mount, and output force.
This 50 mm bore double-acting cylinder uses a G1/4 air port. It generates a push force of 982 N and a pull force of 825 N at 0.5 MPa. At 0.7 MPa it pushes 1374 N, and the theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X175TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X175TC replacement — usually within 7-8 hours.