
The AirTAC Airtac MSG Stainless Steel Mini Air Cylinder MSG32X125S is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø32mm bore and 125mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
The AirTAC MSG32X125S is a single acting, push-type JIS round-body mini cylinder with a 32 mm bore and 125 mm stroke: compressed air extends the rod, and an internal return spring retracts it when air is released. Because air is only used on the work stroke, one air line and one valve port are enough, which saves air and simplifies the circuit for one-way clamping, ejecting or pressing. The 281.3 N push at 0.5 MPa is already net of the spring, so a realistic working load is about 168 N, roughly 17 kg, with a safe vertical lift figure near 14 kg. Operating pressure is 0.2 to 1.0 MPa (28 to 145 psi) and speed runs 50 to 800 mm/s.
Construction is a riveted round body in SUS304 stainless with a hard-chrome 20 um plated carbon-steel rod, so the cylinder resists damp and washdown environments, and the JIS footprint drops into standard JIS mini brackets and I/Y knuckles. The S in the model code means a magnet is fitted, so CMSG, DMSG or EMSG switches can be mounted for end-position sensing. A fixed anti-impact bumper pad softens the stroke end; it is not a lock or brake, and on air loss the spring simply returns the rod to its retracted rest position.
| Model | Airtac MSG Stainless Steel Mini Air Cylinder MSG32X125S |
|---|---|
| Series | MSG JIS mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 125 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 150 mm |
Specifications follow the official AirTAC MG-series (JIS standard) datasheet. Barrel: SUS304 stainless steel (round-body, riveted construction); piston rod: carbon steel with 20µm hard-chrome plating. Thread options: PT (blank) / G / NPT.
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 281.3 N |
| 0.7 MPa | 442.1 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
| MSG | JIS round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 32 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB / CB / SDB | Mounting: FA flange, LB foot, CB clevis, SDB pivot bracket (with CB). |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, CB clevis, SDB pivot block, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Clamps a fixture with about 281 N at 0.5 MPa; if air is lost, the return spring releases the clamp automatically instead of leaving it stuck closed.
Pushes finished parts off a conveyor stop or out of a nest at up to 125 mm of travel, with the spring retracting the rod for the next cycle.
Presses caps or lids onto containers with roughly 17 kg of realistic working force, then retracts without a second valve port or return line.
Choose the MSG32X125S when your one-way work stroke needs about 281 N (28.7 kgf) of push at 0.5 MPa and 125 mm of travel, with the spring handling the return. Bore 32 sits in the middle of the MSG range: bore 20 gives about 110 N and bore 25 about 172 N at 0.5 MPa for lighter clamps, while bore 40 reaches about 440 N for heavier presses. Note the spring sets a 0.2 MPa (28 psi) minimum working pressure, and spring-return travel caps the standard stroke at 150 mm for this bore; if you need a longer stroke or powered movement in both directions, step up to the double-acting MG. Mounting options are LB foot, FA flange, CB clevis and SDB pivot, plus I and Y rod knuckles, and the -S magnet already fitted here accepts CMSG/DMSG/EMSG switches. Ports are 1/8" on every MSG bore, threaded PT as standard (G or NPT on request).
Quick checklist
The 32 mm bore gives 281.3 N push at 0.5 MPa and 442.1 N at 0.7 MPa, already net of the return spring. Operating pressure is 0.2 to 1.0 MPa (28 to 145 psi) with a proof pressure of 1.5 MPa (215 psi), working temperature -20 to +70 C, and speed 50 to 800 mm/s. The fluid is air filtered to 40 um, supplied through a 1/8" port.
This is a single acting push cylinder: air extends the rod and an internal spring retracts it when air is released, so only one air line and one valve port are needed. On air loss the rod returns to its retracted rest position; the fixed bumper pad softens the stroke end but does not lock or hold a load. The S means a magnet is fitted, so CMSG, DMSG or EMSG switches can detect end positions. For powered return or longer strokes, use the double-acting MG instead.
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