
The AirTAC Airtac MTG Stainless Steel Mini Cylinder MTG25X150S is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø25mm bore and 150mm 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 MTG25X150S is a single acting, spring-return PULL cylinder built to the JIS mini-cylinder footprint: a 25 mm bore and 150 mm stroke in a riveted round body with a SUS304 stainless barrel and a hard-chrome-plated 10 mm rod. Because the internal spring extends the rod and compressed air retracts it, one air line is all you need, which simplifies plumbing on machines where the working motion is a one-way draw, close or tension stroke. With the magnet fitted as standard (-S code), CMSG, DMSG or EMSG switches can be clipped on for end-position sensing.
Net pull output, already after the spring, is about 132.6 N at 0.5 MPa and 215 N at 0.7 MPa. A practical working figure is roughly 80 N, or about 8 kg of sustained pull, which suits light clamping, pin retraction and web-tension duties. Operating pressure runs from 0.2 MPa (28 psi) up to 1.0 MPa (145 psi) with a 1.5 MPa (215 psi) proof rating, at 50-800 mm/s and -20 to +70 C. The fixed anti-impact bumper pad softens the stroke ends only; it is not a lock or brake, and on air loss the spring simply pushes the rod back out to its extended rest position.
| Model | Airtac MTG Stainless Steel Mini Cylinder MTG25X150S |
|---|---|
| Series | MTG JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 150 mm |
| Acting type | Single acting, pull (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 | Pull force (spring return) |
|---|---|
| 0.5 MPa | 132.6 N |
| 0.7 MPa | 215.0 N |
Single-acting pull: the spring extends the rod; air retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
| MTG | JIS round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 25 | Bore size in mm. |
| ×150 | 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.
Air pulls a locating or locking pin out of its detent; when pressure drops or venting occurs, the spring pushes the pin back out automatically, giving a fail-to-extended position with no second valve port.
With about 80 N of realistic working pull at 0.5 MPa, the cylinder draws a tape, film or belt against a roller to hold light, consistent tension on packaging and converting lines.
Retract a slide or flap on a chute, hopper or small enclosure on demand; the spring returns it open the moment air is removed, keeping the mechanism simple and one-directional.
Size the MTG family by net pull: bore 20 gives 84.8 N at 0.5 MPa, this 25 mm bore gives 132.6 N, bore 32 gives 224.8 N and bore 40 gives 339.1 N, all at the same 150 mm maximum standard stroke. If you need a two-way powered stroke or travel beyond 150 mm, the spring-return design will not suit it; step up to the double-acting MG series instead. Remember the direction of action: the spring extends the rod and air pulls it in, so the work must happen on the retract stroke, and the supply must reach at least 0.2 MPa (28 psi) to overcome the spring. Mounting choices are LB foot, FA flange, CB clevis and SDB pivot, with I and Y rod knuckles; the -S in this model means the magnet is fitted for CMSG/DMSG/EMSG switches. Ports are 1/8" on every MTG bore, with PT thread standard and G or NPT optional.
Quick checklist
Net pull, already after the spring, is 132.6 N at 0.5 MPa and 215 N at 0.7 MPa. Operating pressure is 0.2-1.0 MPa (28-145 psi) with a 1.5 MPa (215 psi) proof pressure, air filtered to 40 um, speed 50-800 mm/s and a temperature range of -20 to +70 C. The port is 1/8" and the rod thread is M10x1.25.
The internal spring extends the rod at rest; applying air retracts (pulls) it, so the work stroke is the inward one. On air loss the rod springs back out to extended, so the cylinder does not hold a load. The MSG series is the mirror image (air pushes, spring retracts), and the MG series is double acting with powered strokes both ways for longer travel or two-way force. This -S model carries a magnet for CMSG/DMSG/EMSG switches.
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