This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X75CA, 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 SI50X75CA
The AirTAC SI50 Standard Cylinder SI50X75CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 75mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X75CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke75 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X75CA
- 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 SI50X75CA
The AirTAC SI50X75CA is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 75mm stroke. Delivering 982N push force at 0.5MPa, it uses a G1/4 port and M16x1.5 rod thread. The direct replacement is the SAI50X75CA, matching the interface, CA clevis mount, and output force exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot hold a sensor; legacy CS1-B/DS1-B switches require an -S variant. The cushion only decelerates; use SAIL or BSAI for load holding.
Airtac SI50 Standard Cylinder SI50X75CA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X75CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X75CA |
| Bore size | Ø50 mm |
| Stroke | 75 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 SAI50X75CA 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 SAI50X75CA 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 SI50X75CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×75 | 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 SI50X75CA Is Used
Package Diverting
Actuates a CA-mounted pivot arm to push parcels off a belt line, utilizing the 982N push force to handle moderate loads reliably.
Clamp Actuation
Provides 75mm of travel to position workholding clamps on a machining fixture, decelerating smoothly via the 30mm adjustable air cushions.
Pallet Stop Gate
Raises and lowers a physical stop gate on a gravity roller conveyor, controlling pallet flow with a 50kg safe vertical lift capacity.
Replacing the Airtac SI50 Standard Cylinder SI50X75CA with the SAI50X75CA
To replace the SI50X75CA, order the SAI50X75CA. It is dimensionally interchangeable per ISO 15552, retaining the 50mm bore, 75mm stroke, G1/4 port, and CA clevis mounting. When sizing, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. If you need position sensing, select an SAI50X75CAS instead, as this base unit lacks a magnet and cannot accept CS1-B/DS1-B switches. For load holding on air loss, the cushion only decelerates; specify an external pilot check valve or the SAIL/BSAI lock variant. At 75mm stroke, side-load risks are minimal, but ensure the CA clevis pin is aligned to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X75CA
- ✓ 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 SI50X75CA FAQ
Yes, the SI50X75CA is discontinued. The direct replacement is the SAI50X75CA. It shares the same ISO 15552 mounting interface, 50mm bore, 75mm stroke, G1/4 port, and CA clevis mount, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 port, M16x1.5 rod thread, and 30mm cushions. It delivers 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X75CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X75CA replacement — usually within 7-8 hours.