The AirTAC Airtac SAI ISO Cylinders SAI40X100SG is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 100mm 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 SAI40X100SG is a double-acting ISO 15552 profile cylinder from AirTAC with G1/4 BSPP ports - a parallel thread that seals on a bonded face washer rather than on the thread flanks, the standard plumbing choice on European and Asian OEM lines. Its 40 mm bore delivers roughly 628 N pushing at 0.5 MPa, and the 100 mm stroke fits compact press, clamp and eject positions where the piston also needs to be position-sensed: this SKU carries the -S magnet, so AirTAC CMSE or DMSE reed/hall switches can clip directly into the grooves machined along both sides of the extruded barrel. Rod end is M12x1.25 with a 16 mm rod, and adjustable cushioning at both stroke ends absorbs deceleration over a 30 mm band. If your line runs hot washdown or elevated media temperature, order the cylinder with Viton (H suffix) seals instead of the standard TPU; the rod itself can be specified in carbon steel, SUS420J2 or SUS304 to suit the environment.
| Model | Airtac SAI ISO Cylinders SAI40X100SG |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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. |
| ×100 | 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.
A 100 mm stroke clears slugs and finished blanks out of a small press die between hits, with 879 N at 0.7 MPa enough to push parts off sticky stripper plates.
Pushes 3-5 kg cartons off a conveyor lane at up to 800 mm/s; the -S magnet and side-groove barrel let a CMSE switch confirm extend/retract for the PLC without external limit switches.
Clamps aluminium workpieces in a machining fixture at roughly 628 N with 0.5 MPa supply, freeing the spindle envelope compared with a bulkier 50 mm bore.
Size both directions before committing: dropping to the 32 mm bore saves space but leaves you with only about 402 N of push at 0.5 MPa, while stepping up to the 50 mm bore buys roughly 982 N at the same pressure - pick 40 mm when your breakaway and work loads fall comfortably between those figures. The 100 mm stroke is a catalogue standard for this bore (max 1200 mm), so no made-to-order lead time applies. This SG variant is supplied with G (BSPP) ports; if your existing manifold or fittings are tapered PT or NPT, order the plain PT version or the SAI40X100ST instead so the seals land correctly. Keep side loads off the rod or add external guiding, and note that a plain SAI cannot hold load on air loss - specify the SAIL locked variant or an external rod lock if that matters. For drop-in replacement, match bore, stroke, G1/4 port, mounting accessory and the -S magnet to your outgoing ISO 15552 cylinder.
Quick checklist
At 0.5 MPa it pushes with about 628 N and pulls with about 528 N. Raise the supply to 0.7 MPa and push rises to roughly 879 N, and at 0.9 MPa it reaches about 1130 N. The theoretical maximum at 1.0 MPa is around 128 kgf. Operating pressure spans 0.15-1.0 MPa with 1.5 MPa proof pressure, and speed runs 30-800 mm/s.
G means the 1/4 ports are G (BSPP) parallel thread, sealing on a bonded washer - match it to your existing BSPP fittings or manifold. For mounting geometry the cylinder follows the ISO 15552 standard interface, so it can serve as a dimensional replacement for other ISO 15552 profile cylinders in 40 mm bore, 100 mm stroke; just carry over the same mounting accessory (LB, FA, FB, CA, TC, etc.) and add -S equivalent sensing or reuse this magnet-ready piston.
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