This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X75, 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 SID Series Double-Rod Cylinder SID50X75
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X75 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 SAID50X75, 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 → SAID50X75
- 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 SID Series Double-Rod Cylinder SID50X75
The AirTAC SID50X75 is a double-acting, double-rod ISO 15552 cylinder featuring a 50mm bore and 75mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, meaning push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This legacy model is discontinued and is replaced direct by the SAID50X75, which shares the exact G1/4 port, M16x1.5 rod thread, and ISO 15552 mounting interface.
The SAI upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For this SKU without a -S suffix, there is no magnet, so it cannot take a magnetic switch. Note that air cushions only decelerate near stroke end; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID50X75 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X75 |
| 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 SAID50X75 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 SAID50X75 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID50X75
| 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 SID Series Double-Rod Cylinder SID50X75 Is Used
Synchronized Tool Driving
Drives two separate work tools from opposite rod ends simultaneously, ensuring perfectly matched timing without requiring a second cylinder.
Anti-Rotation Vertical Lift
The dual-rod geometry prevents piston rotation during vertical lifts, maintaining precise orientation for material handling up to the 42 kg safe limit.
Equal-Force Transfer
Transfers workpieces on a conveyor line where identical push and pull forces (825 N @0.5 MPa) are required for symmetric damping in both directions.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X75 with the SAID50X75
To replace the discontinued SID50X75, swap directly to the SAID50X75, keeping the 50mm bore, 75mm stroke, and G1/4 port. When sizing both ways, verify the equal force fits your needs, or step to neighbouring bores like 40mm or 63mm. A double rod is right when you need anti-rotation stability or want to drive two tools simultaneously. Mounting options include FA, LB, and TC foot/tap interfaces. Because this is a no-S SKU, it cannot accept sensors. For stroke lengths of 300mm or greater, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X75
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID50X75 FAQ
Yes, the SID50X75 is discontinued. The direct replacement is the SAID50X75. It shares the same ISO 15552 interface, 50mm bore, 75mm stroke, G1/4 port, and equal both ways force. The SAI family also adds upgraded piston seals and SAIL/BSAI lock variants the SI line lacked.
The SID50X75 features a G1/4 air port and provides equal force both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It operates at 0.15-1.0 MPa with a 30mm adjustable cushion at each end and a speed range of 30-800 mm/s.
Request a Quote for the SAID50X75
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X75 replacement — usually within 7-8 hours.