The AirTAC Airtac SAI ISO Cylinders SAI40BX200SG is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 200mm 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 SAI40BX200SG is a double-acting ISO 15552 profile cylinder with G1/4 BSPP parallel ports - the pipe thread that seals on a bonded face washer rather than on the thread flanks, the usual choice on European and Asian OEM manifolds. In this 40 mm bore the cylinder delivers roughly 628 N of push at 0.5 MPa, and the 200 mm stroke suits mid-travel tasks such as diverting product or extending a fixture clamp over a fixture rail. The B suffix means the piston rod is SUS304 stainless rather than the standard carbon steel, which pays off where washdown mist or condensation would pit a plain rod. Because this SKU ends in SG, the magnet for position sensing is already installed: pair it with AirTAC CMSE or DMSE reed/hall switches that clip into the sensor grooves on both sides of the extruded barrel, no disassembly needed.
| Model | Airtac SAI ISO Cylinders SAI40BX200SG |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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.
Pushing a stainless gate across a filler conveyor to reject misaligned bottles - the 628 N push at 0.5 MPa moves a light gate fast within the 30-800 mm/s band, while the SUS304 rod shrugs off daily caustic rinsing.
Actuating a sample-line flap valve on a treatment skid with a 200 mm opening throw. The stainless rod and the magnet-driven DMSE switch give closed-loop confirmation of the flap position to the PLC.
Extending a pusher plate that slides glassware racks into a washer tunnel. BSPP ports tie straight into the machine's existing G-thread valve manifold with bonded-washer fittings, and the 128 kgf class output handles stacked racks with reserve.
Size down to bore 32 (about 402 N at 0.5 MPa) if your load is light and cycle speed matters; step up to bore 50 (about 982 N at 0.5 MPa) when the load exceeds roughly 500 N or you want cushion margin. With 628 N of push at 0.5 MPa, keep the working load below about 40% of that so acceleration stays healthy. Note that a plain double-acting cylinder of this type will drift once air is removed - the end cushions only slow the piston near stroke end, so for positive holding use the SAIL lock version or an external rod lock. Because the SG variant uses G1/4 BSPP parallel ports, verify your plumbing first: order bonded-seal or O-ring-face fittings and check the manifold ports are parallel G thread, not tapered PT. If you are replacing another make of ISO 15552 cylinder, match bore, stroke, mounting accessory (LB foot, FA/FB flange, CA/CB clevis or TC trunnion) and confirm the incoming thread is G - the standard SAI is supplied with PT, which is the only difference in the basic version. The magnet is fitted on this SKU, so switching is plug-and-play.
Quick checklist
At 0.5 MPa supply it pushes with about 628 N and pulls with about 528 N (rod-side annulus loss). At 0.7 MPa push rises to roughly 879 N, and at 0.9 MPa it reaches about 1130 N. The theoretical ceiling at 1.0 MPa is around 128 kgf for this 40 mm bore. Cushioning at both ends is adjustable, and rated speed spans 30-800 mm/s.
Yes - the SAI follows the ISO 15552 mounting interface, so bore, stroke, rod thread (M12x1.25 on this 40 mm bore) and accessory dimensions line up with other ISO 15552 profiles; match your existing mounting accessory and confirm the port. The SG suffix is the port and rod code: G1/4 BSPP parallel ports (sealing on a bonded washer, a made-to-order option versus the standard tapered PT) plus SUS304 rod and a built-in magnet for CMSE/DMSE switches.
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