The AirTAC Airtac SAI ISO Cylinders SAI50X50SG is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 50mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
The AirTAC SAI50X50SG is a double-acting ISO 15552 profile cylinder with G1/4 BSPP parallel ports, which seal on a bonded face washer rather than on the thread itself. Its 50 mm bore delivers about 982 N of push force at 0.5 MPa, and the short 50 mm stroke makes it a compact choice for positioning, gating and clamping moves that need only a few centimetres of travel. A practical detail for high-temperature or washdown environments: the standard TPU seals can be swapped for Viton (suffix H) or NBR (suffix N) at order time, so the same barrel handles hotter or oilier air lines. Both sides of the extruded aluminium barrel carry a sensor switch groove, so reed or Hall sensors such as CMSE and DMSE can be clipped on either flank when the piston is ordered with the -S magnet option.
| Model | Airtac SAI ISO Cylinders SAI50X50SG |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 50 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 stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Raising or lowering a stop blade on a pallet conveyor needs roughly 50 mm of lift and modest force; 982 N at 0.5 MPa pushes a loaded gate up under a 30 kg pallet stream without drama, and the G1/4 BSPP ports mate directly with EU conveyor valve manifolds.
A short swing or push clamp on a drilling jig holds the workpiece through the cycle; the 50 mm stroke is enough for clearance over the bushing plate, and Viton H seals keep the cylinder alive on hot spindle-exhaust air lines.
Kicking off-spec bottles at a filler inspection station calls for a fast, short throw; this cylinder runs 30-800 mm/s, so the flap snaps across the lane between containers, and the dual sensor grooves let position be confirmed from either side of the barrel.
Size check both ways: the next bore down, the 40 mm SAI, gives 628 N at 0.5 MPa and may starve this application if the load approaches 60 kg equivalent; the next bore up, the 63 mm SAI, gives 1559 N at 0.5 MPa if you later add tooling weight or want a wider safety margin. Because this is the SG version, your air plumbing must match G-thread (BSPP) parallel fittings sealed with a bonded washer - common on European and Asian OEM manifolds. If your machine is piped for PT/Rc tapered ports, order the plain-thread sibling instead of adapting with reducers. Keep in mind that a plain SAI does not hold position when air is lost or the valve centres - the rod can drift under load; specify the SAIL lock variant or an external rod lock if the gate must stay put without live pressure. For a like-for-like ISO 15552 replacement, match bore 50, stroke 50, the G1/4 port standard, the mounting accessory (LB foot, FA/FB flange, CA/CB clevis or TC trunnion) and the -S magnet if sensors are fitted.
Quick checklist
At 0.5 MPa supply it pushes with 982 N and pulls with 825 N; at 0.7 MPa push force rises to 1374 N, and at 0.9 MPa it reaches 1767 N. The theoretical maximum at 1.0 MPa is 200 kgf. Operating pressure spans 0.15-1.0 MPa with a 1.5 MPa proof rating, and both ends carry an adjustable air cushion rated for this 50 mm bore.
Yes - the SAI follows the ISO 15552 (ex-VDMA 24562) mounting interface, so any other ISO 15552 cylinder of bore 50 and stroke 50 can be swapped for it using the same brackets and accessories. The SG suffix means the 1/4 ports are G (BSPP) parallel thread, which seals on a bonded washer and is standard on European and Asian OEM plumbing; if your existing fittings are PT/Rc tapered, the base-thread version is the drop-in choice.
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