This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X175S, 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 SID50X175S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X175S 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 SAID50X175S, 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 → SAID50X175S
- 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 SID50X175S
The AirTAC SID50X175S is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding identical push and pull force (825 N at 0.5 MPa) via the equal rod-side areas. The direct replacement is the SAID50X175S, which retains the 50 mm bore, 175 mm stroke, G1/4 port, and mounting interface. The SAI family introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Because the second rod acts as an anti-rotation guide and can carry a sensor cam, this design suits symmetrical loading. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that air cushions only decelerate near stroke end; for load holding on air loss, use an external rod lock or the SAIL/BSAI lock variant.
Airtac SID Series Double-Rod Cylinder SID50X175S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X175S |
| 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 SAID50X175S 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 SAID50X175S 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 SID50X175S
| 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 SID Series Double-Rod Cylinder SID50X175S Is Used
Symmetrical Conveyor Transfer
Drives a dual-sided pusher off both rod ends to shift workpieces across parallel conveyor belts without rotational drift.
External Cam Actuation
Uses the rear rod extension to trigger mechanical limit switches or pilot valves independently of the primary front-rod tooling.
Balanced Gripper Slides
Powers opposing gripper jaws equally from a central piston, ensuring synchronized clamping force throughout the travel.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X175S with the SAID50X175S
To replace the SID50X175S, install the direct replacement SAID50X175S, which matches the ISO 15552 mounting dimensions, 175 mm stroke, and G1/4 port. Size both directions by checking the equal-both-ways force: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. If your application needs less force, step down to the 40 mm bore (528 N at 0.5 MPa); if more is required, step up to the 63 mm bore (1402 N at 0.5 MPa). Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Mounting options include Basic, FA, LB, and TC. Retain the -S magnet option for position sensing. For strokes of 300 mm or longer, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X175S
- ✓ 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 SID50X175S FAQ
Yes, the AirTAC SID50X175S is discontinued. The direct replacement is the SAID50X175S. It shares the exact ISO 15552 mounting interface, 50 mm bore, 175 mm stroke, G1/4 port, and equal-both-ways force, while adding an upgraded piston seal.
Because it is a double-rod cylinder, force is equal in both directions: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. It operates at speeds of 30-800 mm/s, has a 20 mm rod, M16x1.5 rod thread, and 30 mm adjustable cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X175S replacement — usually within 7-8 hours.