This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X100TC, 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 SI50X100TC
The AirTAC Airtac SI50 Standard Cylinder SI50X100TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X100TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X100TC
- 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 SI50X100TC
The AirTAC SI50X100TC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 100mm stroke, delivering 982N push force at 0.5MPa via a G1/4 port. As an end-of-line unit, it is replaced by the SAI50X100TC direct, which shares the exact TC trunnion mounting, M16x1.5 rod thread, and 30mm cushions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. For sensing, note this specific SI SKU lacks a magnet and cannot accept CS1-B/DS1-B switches.
Airtac SI50 Standard Cylinder SI50X100TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X100TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X100TC |
| Bore size | Ø50 mm |
| Stroke | 100 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 SAI50X100TC 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 SAI50X100TC 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 SI50X100TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SI50X100TC Is Used
Package Diversion
Drives a 100mm stroke diverter arm on a packaging line, using the 982N push force to reliably redirect medium-weight cartons at speeds up to 800mm/s.
Clamp Actuation
Provides repeatable clamping pressure for CNC machining fixtures, utilizing the TC trunnion mount to accommodate pivoting alignment during the 100mm travel.
Replacing the Airtac SI50 Standard Cylinder SI50X100TC with the SAI50X100TC
To replace the SI50X100TC, order the SAI50X100TC and confirm the ISO 15552 TC trunnion mount, 50mm bore, 100mm stroke, and G1/4 port. Because this non-magnet SKU cannot support sensors, add the -S suffix if position detection is needed. Sizing both ways: a 63mm bore yields 1559N push at 0.5MPa, while a 40mm bore offers 628N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X100TC
- ✓ 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 SI50X100TC FAQ
Yes, the SI50X100TC is discontinued. The direct replacement is the SAI50X100TC. It shares the identical ISO 15552 TC mounting interface, 50mm bore, 100mm stroke, output force, and G1/4 port, fitting directly into existing fixtures.
The 50mm bore features a G1/4 air port and provides 982N push / 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa. It operates at 30-800mm/s with 30mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X100TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X100TC replacement — usually within 7-8 hours.